A cylindrical blind hole workpiece quenching device with a guide float and an umbrella-shaped porous nozzle

Abstract

The present application belongs to the technical field of cylindrical blind hole workpiece quenching, and in particular to a cylindrical blind hole workpiece quenching device with a guide float and an umbrella-shaped multi-hole nozzle, comprising a rack assembly, a plurality of steel cage quenching structures are fixedly installed inside the rack assembly, and a liquid supply structure is fixedly installed between the lower end surface of the steel cage quenching structure and the rack assembly. The present application adopts a fixed inner spray rod and a steel cage bearing unit which are double-rigidly connected to the rack, avoiding the cumulative error generated by the traditional movable parts during clamping and quenching, significantly improving the overall stability and repeat positioning accuracy of the equipment, and ensuring the consistency of the quenching process.

Description

Technical Field

[0001] This invention relates to the field of quenching technology for cylindrical blind hole workpieces, specifically to a quenching device for cylindrical blind hole workpieces with a guide float and an umbrella-shaped multi-hole nozzle. Background Technology

[0002] In the field of metal heat treatment, quenching of cylindrical workpieces with central blind holes (such as shafts and sleeves) is a key process for improving their performance. The uniformity of the quenching process directly determines the hardness distribution, microstructure, and final service life of the workpiece. However, existing technologies for quenching such complex workpieces have significant shortcomings and cannot meet the demands of modern industry for high precision and high reliability.

[0003] Specifically, existing quenching equipment and methods mainly face the following technical bottlenecks: First, due to the restricted flow of the medium within the blind hole cavity, conventional internal spraying devices struggle to achieve uniform circumferential and axial coverage of the quenching fluid, easily creating cooling dead zones and resulting in uneven hardness of the inner wall. Second, during clamping, the alignment of the internal spraying rod and the blind hole of the workpiece relies heavily on manual operation or simple fixtures, making it difficult to guarantee coaxiality and easily leading to insertion deviations, damaging the workpiece or the spraying rod. Third, the guiding mechanisms added to some equipment are exposed to high-temperature, impurity-containing quenching media for extended periods, making them highly susceptible to failure due to contamination and jamming, resulting in poor reliability. Furthermore, the problem of asynchronous internal and external cooling is also prevalent, easily increasing the risk of workpiece deformation and cracking.

[0004] In summary, existing technologies have significant shortcomings in terms of uniformity, alignment accuracy, environmental adaptability, and process synchronization when processing cylindrical workpieces with blind holes. Therefore, there is an urgent need for a new type of quenching device that can achieve automatic and precise alignment, ensure uniform internal and external cooling, and maintain long-term stable operation in harsh environments to overcome current technological bottlenecks. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a quenching device for cylindrical blind hole workpieces with a guide float and an umbrella-shaped multi-hole nozzle, solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a quenching device for cylindrical blind hole workpieces with guide float and umbrella-shaped multi-hole nozzle, comprising a frame assembly, wherein a plurality of steel cage quenching structures are fixedly installed inside the frame assembly, and a liquid supply structure is fixedly installed between the lower end face of the steel cage quenching structure and the frame assembly. The frame assembly includes a bottom frame, an upper platform fixedly mounted on the upper surface of the bottom frame, an upper platform cover plate fixedly mounted inside the upper platform, and a number of upper platform mounting positions corresponding to the steel cage quenching structure fixedly mounted inside the upper platform cover plate. A liquid delivery pipe A is also fixedly mounted inside the bottom frame, and several connection ports are fixedly mounted on one side of the liquid delivery pipe A. An inlet pipe B is also fixedly mounted on one side of the connection ports. The inlet pipe B is fixedly mounted on the upper platform of the frame through a pipe bracket.

[0007] As a preferred technical solution of the present invention, the steel cage quenching structure includes an installation sleeve fixedly installed inside the platform installation position on the frame, a steel cage device is fixedly installed inside the installation sleeve, a plurality of steel outer rings are sleeved on the outside of the steel cage device, a bottom liquid inlet device is fixedly installed on the lower end face of a plurality of steel cage devices, and a nozzle float device is also fixedly installed inside the steel cage quenching structure. The bottom liquid inlet device includes a bottom liquid inlet fixedly installed on the lower end face of the steel cage device. A liquid delivery chamber is fixedly installed on the upper end face of the bottom liquid inlet. A liquid delivery device is fixedly installed on the upper end face of the liquid delivery chamber. A nozzle float device is also fixedly installed on the upper end face of the liquid delivery device.

[0008] As a preferred embodiment of the present invention, the liquid delivery chamber includes a liquid delivery chamber shell fixedly installed on the upper end face of the bottom liquid inlet, an inner cavity fixedly installed inside the liquid delivery chamber shell, a plurality of external cleaning and conveying pipes fixedly installed on the inner cavity wall, and a plurality of peripheral stabilizing rods fixedly installed inside the inner cavity. The liquid conveying device includes an outer protective pipe fixedly installed on the upper end face of the liquid delivery chamber shell. Five pressurizing pipes are also fixedly installed on the upper end face of the liquid delivery chamber shell. All five pressurizing pipes are connected to the inner cavity. The upper end faces of the five pressurizing pipes are fixedly connected to a five-in-one connecting pipe. An internal quenching liquid conveying rod is fixedly installed on the upper end face of the five-in-one connecting pipe. The upper end face of the outer protective pipe is provided with an internal thread, and the upper end face of the inner quenching liquid conveying rod is provided with an external thread. Both the internal and external threads are fixedly installed with nozzle float devices.

[0009] As a preferred embodiment of the present invention, the nozzle float device includes a quenching nozzle fixedly installed on the internal thread and the external thread, and a guide float is movably installed above the quenching nozzle. The guide float includes a guide joint, a guide ring is fixedly installed around the guide joint, and a pressing rod reset device is fixedly installed inside the guide joint. The lower end face of the pressing rod reset device is fixedly installed inside the guide joint, and the pressing rod is fixedly installed inside the pressing rod reset device. The pressing rod reset device can undergo elastic deformation under the action of the pressing rod. The pressing rod moves inside the guide joint under the action of the pressing rod reset device, and the range of movement is the range of elastic deformation of the pressing rod reset device.

[0010] As a preferred embodiment of the present invention, the quenching nozzle includes a connecting pipe fixedly installed at the internal and external threads. A nozzle is fixedly installed on the upper end face of the connecting pipe. A through hole is provided inside the nozzle. One end of the through hole is provided with a stepped structure that cooperates with a sealing valve. A return spring structure is sleeved on the outside of the sealing valve. Both the sealing valve and the return spring structure are fixedly installed inside the mounting sleeve. A buffer platform is fixedly installed on the upper end face of the mounting sleeve. A shock-absorbing spring is sleeved on the buffer platform. A docking guide head is fixedly installed on the upper end face of the buffer platform. A connecting mounting ring is fixedly installed on the lower end face of the docking guide head. The lower end face of the connecting mounting ring is fixedly installed on the upper end face of the nozzle. The docking guide head can move up and down under the action of the buffer platform. The nozzle is provided with several quenching liquid spray nozzles around its periphery. The quenching liquid spray nozzles are provided with spray directions on the periphery and the top. The sealing valve cooperates with the stepped structure to realize the passage and interception of quenching liquid. The shock-absorbing spring sleeved on the buffer platform realizes shock absorption for the docking guide head.

[0011] As a preferred embodiment of the present invention, the steel cage device includes a plurality of external quenching nozzles, and a plurality of external quenching nozzle mounting positions are provided around the external quenching nozzles, and an external quenching nozzle is provided at each of the plurality of external quenching nozzle mounting positions.

[0012] As a preferred embodiment of the present invention, the external quenching nozzle includes a pair of connecting mounting plates fixedly installed at the external quenching nozzle installation position, and quenching liquid conveying plates are fixedly installed on both sides of the connecting mounting plates, and quenching liquid nozzles are fixedly installed on the quenching liquid conveying plates.

[0013] As a preferred embodiment of the present invention, the external dimensions of the guide joint at the bottom of the guide float are the same as the internal dimensions of the docking guide head on the upper side of the quenching nozzle.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention adopts a double rigid connection between a fixed inner spray bar and a steel cage support unit to the frame, which avoids the cumulative error generated by traditional movable parts during clamping and quenching, significantly improves the overall stability and repeatability of the equipment, and ensures the consistency of the quenching process.

[0015] 2. This invention uses the workpiece's own weight to drive the guide float to sink. Its bottom conical structure can automatically guide the nozzle of the fixed inner spray bar to accurately align with the blind hole of the workpiece, effectively solving the coaxiality deviation problem during manual or mechanical insertion and avoiding collision damage between the spray bar and the workpiece.

[0016] 3. In this invention, the end of the inner spray bar adopts an umbrella-shaped multi-hole nozzle, which diffuses the quenching medium to cover the inner wall of the blind hole through multiple layers of radially inclined spray holes, achieving full axial and circumferential coverage; combined with external surrounding spray, it achieves synchronous and uniform cooling of the inner and outer surfaces of the workpiece, thereby improving the metal structure and enhancing the overall mechanical properties and hardness uniformity of the workpiece.

[0017] 4. The guide float of this invention is made of lightweight media-resistant materials (such as oil-resistant engineering plastics or composite materials) and is designed as a floating structure. It floats on the liquid surface when not in operation, avoiding the problems of jamming and wear caused by the deposition of impurities in the quenching medium. It has a long service life and reduces the frequency and cost of maintenance.

[0018] 5. The invention allows the steel cage structure to be adapted to the outer diameter of the workpiece, taking into account both workpiece positioning and media flow requirements; the nozzle pressure and flow rate are adjustable, making it suitable for cylindrical blind hole workpieces of different specifications within the φ100-200mm range, and compatible with various media such as quenching oil or water-based quenching fluid, possessing good process compatibility and production flexibility. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the rack assembly; Figure 3 This is a schematic diagram of a steel reinforcement cage quenching structure. Figure 4 for Figure 3 Enlarged view of point A; Figure 5 This is a schematic diagram of the bottom liquid inlet device; Figure 6 for Figure 5 Enlarged view of point C; Figure 7 This is a schematic diagram of the bottom liquid inlet device; Figure 8 This is a schematic diagram of the nozzle float device; Figure 9 This is an explosion diagram of the quenching nozzle; Figure 10 A schematic diagram of the explosion guiding the float; Figure 11 Schematic diagram of external quenching nozzle; Figure 12 for Figure 11 Enlarged view of point B; Figure 13 This is a schematic diagram of an external quenching nozzle.

[0020] In the picture: 1. Rack assembly; 11. Upper platform of the rack; 12. Upper platform cover; 13. Installation position of the upper platform of the rack; 14. Bottom rack; 15. Liquid delivery pipe A; 16. Liquid inlet pipe B; 17. Pipe support; 18. Connection port; 2. Reinforcing cage quenching structure; 21. Installation sleeve; 23. Outer ring of reinforcing bars; 22. Reinforcing cage assembly; 221. External quenching nozzle; 2211 External quenching nozzle; 22111 Quenching fluid delivery plate; 22112 Connecting mounting plate; 22113 Quenching fluid nozzle; 24. Bottom liquid inlet device; 241. Bottom liquid inlet; 242. Liquid delivery chamber; 2421. Liquid delivery chamber outer shell; 2422. External cleaning and delivery pipeline; 2423. Inner cavity; 2424. Peripheral stabilizing bar; 243. Liquid conveying device; 2431. External protective pipe; 2432. Internal quenching liquid conveying rod; 2433. Pressurization pipe; 25. Nozzle float device; 251. Guide float; 2511. Pressing rod; 2512. Pressing rod reset device; 2513. Guide ring; 2514. Guide joint; 252. Quenching nozzle; 2521. Docking guide head; 2522. Connecting mounting ring; 2523. Buffer platform; 2524. Mounting sleeve; 2525. Return spring structure; 2526. Sealing valve; 2527. Nozzle; 2528. Connecting pipe; 3. Liquid supply structure. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example: Please see Figure 1-13The present invention provides the following technical solution: a quenching device for cylindrical blind hole workpieces with guide float and umbrella-shaped multi-hole nozzle, including frame assembly 1, a plurality of steel cage quenching structures 2 are fixedly installed inside the frame assembly 1, and a liquid supply structure 3 is fixedly installed between the lower end face of the steel cage quenching structure 2 and the frame assembly 1. The frame assembly 1 includes a bottom frame 14, with an upper frame platform 11 fixedly installed on the upper surface of the bottom frame 14. An upper platform cover plate 12 is fixedly installed inside the upper platform platform 11. The upper platform cover plate 12 has a number of upper frame platform installation positions 13 corresponding to the steel cage quenching structure 2. A liquid delivery pipe A15 is also fixedly installed inside the bottom frame 14. Several connection ports 18 are fixedly installed on one side of the liquid delivery pipe A15. An inlet pipe B16 is also fixedly installed on one side of the connection port 18. The inlet pipe B16 is fixedly installed on the upper frame platform 11 through a pipe bracket 17.

[0023] In this embodiment, the frame assembly 1 constitutes the rigid basic frame of the entire device. The bottom frame 14 is fixed to the quenching pool filled with quenching liquid by bolts. The upper platform 11 is welded to the bottom frame 14. The upper platform cover plate 12 installed on it and the upper platform installation position 13 are used to precisely fix the steel cage quenching structure 2 above. The liquid delivery pipe A15 and the liquid inlet pipe B16 together form the medium supply channel. They are fixedly connected to the bottom frame 14 and the upper platform 11 of the frame through the connection port 18 and the pipe support 17, respectively, to ensure the stability of the high-pressure quenching liquid delivery pipeline.

[0024] Specifically, the steel cage quenching structure 2 includes an installation sleeve 21 fixedly installed inside the platform installation position 13 on the frame. A steel cage device 22 is fixedly installed inside the installation sleeve 21. Several steel outer rings 23 are sleeved on the outside of the steel cage device 22. A bottom liquid inlet device 24 is fixedly installed on the lower end face of several steel cage devices 22. A nozzle float device 25 is also fixedly installed inside the steel cage quenching structure 2. The bottom liquid inlet device 24 includes a bottom liquid inlet 241 fixedly installed on the lower end face of the steel cage device 22, a liquid delivery chamber 242 fixedly installed on the upper end face of the bottom liquid inlet 241, a liquid conveying device 243 fixedly installed on the upper end face of the liquid delivery chamber 242, and a nozzle float device 25 fixedly installed on the upper end face of the liquid conveying device 243.

[0025] In this embodiment, the steel cage quenching structure 2 is the core unit that carries the workpiece and realizes internal spray quenching. The mounting sleeve 21 is fixed to the mounting position 13 on the platform of the frame through the flange to ensure vertical alignment. The steel cage device 22 is welded to the outer ring of the steel bars 23 to form a cage-like structure, which is fixed inside the mounting sleeve 21. Its internal space is used to place the cylindrical workpiece and at the same time ensure the flow of quenching medium. The bottom liquid inlet device 24 is connected to the lower end face of the steel cage device 22 through bolts, forming the bottom inlet and distribution hub of the quenching medium. The nozzle float device 25 is installed above it to complete the precise spraying of the inner cavity of the workpiece. This layered fixing structure realizes the integration of workpiece positioning, medium transportation and internal spray guidance functions.

[0026] Specifically, the liquid delivery chamber 242 includes a liquid delivery chamber outer shell 2421 fixedly installed on the upper end face of the bottom liquid inlet 241, an inner cavity 2423 fixedly installed inside the liquid delivery chamber outer shell 2421, a number of external cleaning and conveying pipes 2422 fixedly installed on the wall of the inner cavity 2423, and a number of peripheral stabilizing rods 2424 fixedly installed inside the inner cavity 2423. The liquid conveying device 243 includes an outer protective pipe 2431 fixedly installed on the upper end face of the liquid delivery chamber shell 2421. Five pressurizing pipes 2433 are also fixedly installed on the upper end face of the liquid delivery chamber shell 2421. All five pressurizing pipes 2433 are connected to the inner cavity 2423. The upper end faces of the five pressurizing pipes 2433 are fixedly connected to a five-in-one connecting pipe. An internal quenching liquid conveying rod 2432 is fixedly installed on the upper end face of the five-in-one connecting pipe. The upper end face of the outer protective pipe 2431 is provided with an internal thread, and the upper end face of the inner quenching liquid conveying rod 2432 is provided with an external thread. Both the internal and external threads are fixedly installed with a nozzle float device 25.

[0027] In this embodiment, the liquid delivery chamber 242 and the liquid conveying device 243 are responsible for pressurizing, distributing, and directional conveying of the quenching medium. The outer shell 2421 of the liquid delivery chamber is welded to the bottom inlet 241, and its inner cavity 2423 serves as a medium buffer and pressurization chamber. The external cleaning and conveying pipe 2422 is welded to the side wall of the inner cavity 2423, which can guide part of the medium to the outside of the workpiece for auxiliary cleaning. The peripheral stabilizing bar 2424 is welded into the inner cavity to enhance structural stability. In the liquid conveying device 243, the outer protective pipe 2431 is connected to... The flange is fixed to the upper end of the liquid delivery chamber shell 2421, serving as a seal and protection. Five pressurized pipes 2433 divert and pressurize the medium in the inner cavity 2423, which is then combined and vertically transported upward to the internal quenching liquid delivery rod 2432 through the five-in-one connecting pipe above. The internal quenching liquid delivery rod 2432 is connected to the outer protective pipe 2431 by threads. This connection method ensures both sealing and facilitates the installation and maintenance of the nozzle float device 25, ensuring a stable supply of high-pressure medium to the quenching nozzle.

[0028] Specifically, the nozzle float device 25 includes a quenching nozzle 252 fixedly installed on the internal and external threads, and a guide float 251 movably installed above the quenching nozzle 252; The guide float 251 includes a guide joint 2514, a guide ring 2513 fixedly installed around the guide joint 2514, a pressing rod reset device 2512 fixedly installed inside the guide joint 2514, the lower end face of the pressing rod reset device 2512 fixedly installed inside the guide joint 2514, and a pressing rod 2511 fixedly installed inside the pressing rod reset device 2512. The pressing rod reset device 2512 can undergo elastic deformation under the action of the pressing rod 2511. The pressing rod 2511 moves inside the guide joint 2514 under the action of the pressing rod reset device 2512, and the range of movement is the range of elastic deformation of the pressing rod reset device 2512.

[0029] In this embodiment, the nozzle float device 25 is a key component for achieving precise quenching and automatic centering of the blind hole cavity. The quenching nozzle 252 is threadedly fastened above the liquid delivery device 243, serving as a fixed medium spraying terminal. Its core function is as follows: when the workpiece is placed into the reinforcing cage, the blind hole end face of the workpiece presses down the pressing rod 2511, thereby compressing the pressing rod reset device 2512 and driving the entire guide float 251 to sink. During the sinking process, the tapered outer contour of the guide joint 2514 at its bottom aligns with the tapered inner hole of the docking guide head 2521 at the top of the quenching nozzle 252. The interaction automatically corrects the radial deviation between the workpiece and the nozzle, achieving precise alignment. This design utilizes the workpiece's own weight for guidance, requiring no additional power, making it simple and reliable. Simultaneously, after compressing the pressing rod reset device 2512, power is transmitted to the sealing valve 2526, causing the sealing valve 2526 to press down, thereby enabling the flow of quenching fluid through the sealing valve 2526. When the workpiece is removed, the pressure of the workpiece on the pressing rod reset device 2512 is released, causing the pressing rod 2511 to reset, and the nozzle float device 25 floats back to the surface of the liquid.

[0030] Specifically, the quenching nozzle 252 includes a connecting pipe 2528 fixedly installed at the internal and external threads. A nozzle 2527 is fixedly installed on the upper end face of the connecting pipe 2528. The nozzle 2527 has a through hole inside. One end of the through hole has a stepped structure that cooperates with the sealing valve 2526. A return spring structure 2525 is sleeved on the outside of the sealing valve 2526. Both the sealing valve 2526 and the return spring structure 2525 are fixedly installed inside the mounting sleeve 2524. A buffer platform 2523 is fixedly installed on the upper end face of the mounting sleeve 2524. A shock-absorbing spring is sleeved on the buffer platform 2523. A docking guide head 2521 is fixedly installed on the upper end face of the buffer platform 2523. A connecting mounting ring 2522 is fixedly installed on the lower end face of the docking guide head 2521. The lower end face of the connecting mounting ring 2522 is fixedly installed on the upper end face of the nozzle 2527. The docking guide head 2521 can move up and down under the action of the buffer platform 2523. The nozzle 2527 has several quenching liquid spray nozzles around its periphery. The quenching liquid spray nozzles are configured with spray directions on the periphery and top. The sealing valve 2526 cooperates with the stepped structure to realize the passage and interception of quenching liquid. The shock-absorbing spring sleeved on the buffer platform 2523 realizes shock absorption for docking guide head 2521.

[0031] In this embodiment, the quenching nozzle 252 is the core component for performing the internal cavity spraying function. The connecting pipe 2528 is responsible for receiving the high-pressure quenching liquid. The sealing valve 2526 inside the nozzle, under the action of the return spring structure 2525, usually closes the through hole to prevent medium leakage. When the guide joint 2514 of the guide float 251 presses down the docking guide head 2521, the force is transmitted through the connecting mounting ring 2522 and the buffer platform 2523 to overcome the elasticity of the return spring structure 2525, pushing the sealing valve 2526 down to open the channel, allowing the quenching liquid to pass through. The multi-layer spray nozzles of the nozzle 2527, which are circumferential and upward tilted, spray the medium out in an umbrella shape, covering the inner wall of the blind hole. The buffer platform 2523 and the shock-absorbing spring on it can absorb the impact when the workpiece is placed and allow the docking guide head 2521 to float to a certain extent, which not only protects the nozzle structure but also further assists the centering process. This structure realizes intelligent spraying control of "opening upon contact and closing upon separation".

[0032] Specifically, the steel cage device 22 includes several external quenching nozzles 221, and several external quenching nozzle installation positions are arranged around the external quenching nozzles 221. Each of the several external quenching nozzle installation positions is equipped with an external quenching nozzle 2211.

[0033] In this embodiment, the reinforcing cage device 22 not only supports and limits the workpiece, but its external quenching nozzles 221 also constitute the main body of the external spraying unit. These nozzles 221 are typically vertically welded or threaded onto the reinforcing cage frame, and their internal cavities are connected to the liquid supply structure 3. The installation positions of the external quenching nozzles arranged around the perimeter ensure that when the workpiece is placed in the cage, its outer surface can be uniformly surrounded and sprayed with quenching medium, thereby achieving synchronous cooling of the inner and outer surfaces of the workpiece and improving the uniformity of quenching.

[0034] Specifically, the external quenching nozzle 2211 includes a pair of connecting mounting plates 22112 fixedly installed at the external quenching nozzle installation position. Quenching liquid conveying plates 22111 are fixedly installed on both sides of the connecting mounting plates 22112, and quenching liquid nozzles 22113 are fixedly installed on the quenching liquid conveying plates 22111.

[0035] In this embodiment, the external quenching nozzle 2211 is the specific actuator for spraying the outer surface. A pair of connecting mounting plates 22112 are fastened to the mounting position of the external quenching nozzle 221 with bolts, achieving quick installation and fixation. The quenching fluid delivery plate 22111 is welded or pressed onto the connecting mounting plate 22112, guiding the quenching fluid from the nozzle 221 to the quenching fluid nozzle 22113 at the end. The quenching fluid nozzle 22113 is typically installed at a specific angle (e.g., towards the center of the workpiece) to ensure that the sprayed medium effectively covers the outer surface of the workpiece. This modular design facilitates adjustment of the number and angle of nozzles according to the workpiece size, enhancing the adaptability of the equipment.

[0036] Specifically, the external dimensions of the guide joint 2514 at the bottom of the guide float 251 are the same as the internal dimensions of the docking guide head 2521 on the upper side of the quenching nozzle 252.

[0037] In this embodiment, the size matching between the guide joint 2514 and the docking guide head 2521 is the key to achieving high-precision automatic alignment. The tapered or cylindrical outer surface of the guide joint 2514 is precisely matched with the corresponding inner tapered surface or inner hole of the docking guide head 2521 to form a "trumpet mouth" type guide structure. During the process of the workpiece pressing down the float, even if there is an initial position deviation, this mating surface can generate radial guiding force, forcing the workpiece (through the float) and the quenching nozzle 252 to automatically adjust to a coaxial state. This passive guiding mechanism based on geometry has a simple structure, does not require sensors or control systems, and can effectively solve the insertion deviation problem, with high reliability.

[0038] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A quenching device for cylindrical blind hole workpieces with guide float and umbrella-shaped multi-hole nozzle, comprising a frame assembly (1), characterized in that: The frame assembly (1) has several steel cage quenching structures (2) fixedly installed inside, and a liquid supply structure (3) is fixedly installed between the lower end face of the steel cage quenching structure (2) and the frame assembly (1). The frame assembly (1) includes a bottom frame (14), an upper frame platform (11) is fixedly installed on the upper surface of the bottom frame (14), an upper platform cover plate (12) is fixedly installed inside the upper platform platform (11), and an upper platform installation position (13) corresponding to the steel cage quenching structure (2) is fixedly installed inside the upper platform cover plate (12). A liquid delivery pipe A (15) is also fixedly installed inside the bottom frame (14), and a number of connection ports (18) are fixedly installed on one side of the liquid delivery pipe A (15). An inlet pipe B (16) is also fixedly installed on one side of the connection port (18). The inlet pipe B (16) is fixedly installed on the upper frame platform (11) by a pipe bracket (17).

2. The quenching device for cylindrical blind hole workpieces with guide float and umbrella-shaped multi-hole nozzle according to claim 1, characterized in that: The steel cage quenching structure (2) includes an installation sleeve (21) fixedly installed inside the platform installation position (13) on the frame. A steel cage device (22) is fixedly installed inside the installation sleeve (21). Several steel outer rings (23) are sleeved on the outside of the steel cage device (22). A bottom liquid inlet device (24) is fixedly installed on the lower end face of several steel cage devices (22). A nozzle float device (25) is also fixedly installed inside the steel cage quenching structure (2). The bottom liquid inlet device (24) includes a bottom liquid inlet (241) fixedly installed on the lower end face of the steel cage device (22), a liquid delivery chamber (242) fixedly installed on the upper end face of the bottom liquid inlet (241), a liquid delivery device (243) fixedly installed on the upper end face of the liquid delivery chamber (242), and a nozzle float device (25) fixedly installed on the upper end face of the liquid delivery device (243).

3. The quenching device for cylindrical blind hole workpieces with guide float and umbrella-shaped multi-hole nozzle according to claim 2, characterized in that: The liquid delivery chamber (242) includes a liquid delivery chamber shell (2421) fixedly installed on the upper end face of the bottom liquid inlet (241). An inner cavity (2423) is fixedly installed inside the liquid delivery chamber shell (2421). Several external cleaning and conveying pipes (2422) are also fixedly installed on the wall of the inner cavity (2423). Several peripheral stabilizing rods (2424) are fixedly installed inside the inner cavity (2423). The liquid conveying device (243) includes an outer protective pipe (2431) fixedly installed on the upper end face of the liquid delivery chamber shell (2421). Five pressurizing pipes (2433) are also fixedly installed on the upper end face of the liquid delivery chamber shell (2421). All five pressurizing pipes (2433) are connected to the inner cavity (2423). The upper end faces of the five pressurizing pipes (2433) are jointly connected to a five-in-one connecting pipe. An internal quenching liquid conveying rod (2432) is fixedly installed on the upper end face of the five-in-one connecting pipe. The outer protective pipe (2431) has an internal thread on its upper end face, and the inner quenching liquid conveying rod (2432) has an external thread on its upper end face. Both the internal and external threads are fixedly installed with a nozzle float device (25).

4. The quenching device for cylindrical blind hole workpieces with guide float and umbrella-shaped multi-hole nozzle according to claim 2, characterized in that: The nozzle float device (25) includes a quenching nozzle (252) fixedly installed on the internal and external threads, and a guide float (251) is movably installed above the quenching nozzle (252). The guide float (251) includes a guide joint (2514), a guide ring (2513) is fixedly installed on the periphery of the guide joint (2514), a pressing rod reset device (2512) is fixedly installed inside the guide joint (2514), the lower end face of the pressing rod reset device (2512) is fixedly installed inside the guide joint (2514), the pressing rod (2511) is fixedly installed inside the pressing rod reset device (2512), the pressing rod reset device (2512) can undergo elastic deformation under the action of the pressing rod (2511), the pressing rod (2511) moves inside the guide joint (2514) under the action of the pressing rod reset device (2512), and the range of movement is the range of elastic deformation of the pressing rod reset device (2512).

5. A quenching device for cylindrical blind hole workpieces with a guide float and an umbrella-shaped multi-hole nozzle according to claim 4, characterized in that: The quenching nozzle (252) includes a connecting pipe (2528) fixedly installed at the internal and external threads. A nozzle (2527) is fixedly installed on the upper end face of the connecting pipe (2528). A through hole is provided inside the nozzle (2527). One end of the through hole is provided with a stepped structure that cooperates with a sealing valve (2526). A return spring structure (2525) is sleeved on the outside of the sealing valve (2526). Both the sealing valve (2526) and the return spring structure (2525) are fixedly installed on the mounting sleeve (2524). Inside the nozzle (2527), a buffer platform (2523) is fixedly installed on the upper end face of the mounting sleeve (2524). A shock-absorbing spring is sleeved on the buffer platform (2523). A docking guide head (2521) is fixedly installed on the upper end face of the buffer platform (2523). A connecting mounting ring (2522) is fixedly installed on the lower end face of the docking guide head (2521). The lower end face of the connecting mounting ring (2522) is fixedly installed on the upper end face of the nozzle (2527). The docking guide head (2521) can move up and down under the action of the buffer platform (2523). The nozzle (2527) is provided with several quenching liquid spray nozzles around its periphery. The quenching liquid spray nozzles are provided with spray directions on the periphery and the top. The sealing valve (2526) cooperates with the stepped structure to realize the passage and interception of quenching liquid. The shock-absorbing spring sleeved on the buffer platform (2523) realizes shock absorption for docking guide head (2521).

6. The quenching device for cylindrical blind hole workpieces with guide float and umbrella-shaped multi-hole nozzle according to claim 2, characterized in that: The steel cage device (22) includes several external quenching nozzles (221), and several external quenching nozzle installation positions are provided around the external quenching nozzles (221). Each of the several external quenching nozzle installation positions is provided with an external quenching nozzle (2211).

7. A quenching device for cylindrical blind hole workpieces with a guide float and an umbrella-shaped multi-hole nozzle according to claim 6, characterized in that: The external quenching nozzle (2211) includes a pair of connecting mounting plates (22112) fixedly installed at the external quenching nozzle installation position. Quenching liquid conveying plates (22111) are fixedly installed on both sides of the connecting mounting plates (22112), and quenching liquid nozzles (22113) are fixedly installed on the quenching liquid conveying plates (22111).

8. A quenching device for cylindrical blind hole workpieces with guide float and umbrella-shaped multi-hole nozzle according to claims 1-7, characterized in that: The external dimensions of the guide joint (2514) at the bottom of the guide float (251) are the same as the internal dimensions of the docking guide head (2521) on the upper side of the quenching nozzle (252).

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