A hot air gun anti-scalding nozzle structure
Patent Information
- Application Number
- CN202522275978.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-28
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-10-28
AI Technical Summary
该结构在使用时，通过防烫开合式喷嘴支架方便快捷的支撑使用后的热风枪喷嘴，避免因热风枪喷嘴放置不当导致的烫伤工作人员或其它物品，但是风道设计单一，仅能沿固定路径输送热风，无法根据实际作业场景（如精细焊接需高风压、大面积加热需低风压）灵活调整热风输送压强；压强调节功能缺失导致适配性差，面对不同规格元件或作业需求时，需频繁更换整套风嘴，操作繁琐且降低作业效率
通过叶轮、增压轮、弧形增压叶片与倒锥形聚拢斗的协同设计，构建多级增压通道，可根据需求保留或拆卸增压轮和部分增压叶片，灵活切换高、中、低风压模式，适配精细焊接、大面积加热等不同作业场景，无需频繁更换风嘴；
Smart Images
Figure CN224837884U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hot air gun nozzle technology, and more specifically, to a hot air gun anti-scalding nozzle structure. Background Technology
[0002] A hot air gun is a tool that uses hot air blown from a heating element to solder and remove components. Based on its working principle, the main part of the hot air gun's control circuit should include a temperature signal amplification circuit, a comparator circuit, a thyristor control circuit, a sensor, and a fan control circuit. Before using the hot air gun, select a suitable nozzle according to the work requirements, attach the nozzle to the air outlet pipe, and use the pressure between the nozzle and the air outlet pipe to fix the nozzle in place.
[0003] Among them, patent CN218096621U discloses a hot air gun nozzle structure, including: a hot air gun nozzle body; and a scalding-proof opening and closing nozzle bracket, which is disposed on the hot air gun nozzle body to support the hot air gun nozzle body. The scalding-proof opening and closing nozzle bracket includes at least: a main mounting plate, one end of which is connected to the side surface of the hot air gun nozzle body and the other end of which extends away from the hot air gun nozzle body; a flip-type retractable bracket, which is disposed on the main mounting plate near the end of the hot air gun nozzle body; and a push-type flip-over drive mechanism, which is disposed between the main mounting plate and the flip-type retractable bracket to drive the flip-type retractable bracket to flip. When in use, this structure provides convenient and quick support for the hot air gun nozzle after use via a heat-resistant, openable nozzle bracket, preventing burns to workers or other items due to improper placement of the hot air gun nozzle. However, the air duct design is simple, only able to deliver hot air along a fixed path, and cannot flexibly adjust the hot air delivery pressure according to actual work scenarios (such as high air pressure required for precision welding and low air pressure required for large-area heating). The lack of pressure adjustment function results in poor adaptability, requiring frequent replacement of the entire set of nozzles when facing different specifications of components or work requirements, which is cumbersome and reduces work efficiency. Utility Model Content
[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a heat gun anti-scalding nozzle structure, which aims to solve the problems mentioned in the background art.
[0005] This utility model provides the following technical solution: a hot air gun anti-scalding nozzle structure, including a cylindrical body, wherein a connecting component is provided in the middle of the cylindrical body; The connecting assembly includes a mounting plate disposed in the middle of the cylinder, a central column disposed in the middle of the mounting plate, and an impeller disposed at the bottom of the central column; A booster wheel is provided at the bottom of the impeller, a gathering hopper is provided at the bottom of the booster wheel, and a number of booster blades are provided on the gathering hopper.
[0006] Optionally, in one possible implementation, a limiting shaft is fixedly provided in the middle of the gathering hopper. One end of the limiting shaft passes through the filter disc, the booster wheel and the impeller in sequence and extends to the middle of the central column. The central column is rotatably connected to the limiting shaft. The filter disc, the booster wheel and the impeller are all detachably connected to the limiting shaft by bolts. Optionally, in one possible implementation, a plurality of mounting brackets are provided on the outer side of the mounting plate, and each mounting bracket is detachably connected to the cylinder by bolts. A filter plate is provided on the top of each of the plurality of pressurizing blades, and the filter plate is sleeved on the outer side of the limiting shaft. The cross-sectional shape of each of the plurality of pressurizing blades is set to arc shape, and the pressurizing blades are welded to the gathering hopper. The technical effects and advantages of this utility model are as follows: Through the coordinated design of impeller, booster wheel, arc-shaped booster blades and inverted conical gathering bucket, a multi-stage booster channel is constructed. The booster wheel and some booster blades can be retained or removed as needed, and high, medium and low wind pressure modes can be flexibly switched to adapt to different operating scenarios such as fine welding and large-area heating, without the need for frequent replacement of air nozzles. The plate can filter welding residue, dust and other impurities in the hot air to prevent clogging of the air duct or damage to components; at the same time, the double fixing structure of the limit shaft and the mounting bracket ensures that the impeller, booster wheel and other components do not shift in the high temperature and high speed environment, and the hot air flow is uniform, which improves the accuracy of welding and component removal. Attached Figure Description
[0007] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.
[0008] Figure 1 This is a front view of the overall structure of this utility model.
[0009] Figure 2 This is a schematic diagram of the connecting component of this utility model.
[0010] Figure 3 This is a schematic diagram of the mounting plate, central column, mounting bracket, and impeller of this utility model.
[0011] Figure 4This is a schematic diagram of the booster wheel, filter disc, gathering hopper, booster blades, and limiting shaft of this utility model.
[0012] The attached diagram is labeled as follows: 1. Cylinder; 2. Mounting plate; 3. Central column; 4. Impeller; 5. Booster wheel; 6. Filter plate; 7. Gathering hopper; 8. Booster blades; 9. Limiting shaft; 10. Mounting frame. Detailed Implementation
[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0014] This embodiment discloses a hot air gun anti-scalding nozzle structure, which aims to solve the problem that the existing hot air gun anti-scalding nozzle structure can only realize a single air channel, making it difficult to increase or decrease the hot air delivery pressure according to actual use needs, and resulting in poor ease of use.
[0015] Specifically, such as Figure 1 As shown, the anti-scalding nozzle structure of this hot air gun includes a cylinder 1, which serves as the main supporting component of the nozzle. It is made of high-temperature resistant alloy material, with a smooth inner wall and anti-oxidation treatment. This effectively reduces resistance during hot air delivery and prevents deformation or corrosion under long-term high-temperature conditions, ensuring the nozzle's service life. A complete connecting assembly is fixedly installed in the middle of the cylinder 1; this assembly is the core component for achieving hot air pressurization adjustment and structural stability.
[0016] like Figure 2 As shown, the connecting assembly includes a mounting plate 2, a central column 3, an impeller 4, a booster wheel 5, a filter plate 6, a converging hopper 7, booster blades 8, a limiting shaft 9, and mounting brackets 10. The mounting plate 2 is a circular, plate-like structure, horizontally positioned inside the middle of the cylinder 1. The outer diameter of the mounting plate 2 matches the inner diameter of the cylinder 1, ensuring a tight fit with the inner wall of the cylinder 1 after installation, preventing hot air leakage from gaps. Four mounting brackets 10 are evenly distributed along the outer edge of the mounting plate 2. Each mounting bracket 10 has an "L"-shaped structure; one end is detachably connected to the outer wall of the mounting plate 2 by bolts, and the other end extends to the inner wall of the cylinder 1 and is fixed by bolts. These symmetrically distributed mounting brackets 10 securely fix the mounting plate 2 in the middle of the cylinder 1, preventing displacement or shaking of the mounting plate 2 during high-speed hot air flow or nozzle movement. Figure 3 As shown.
[0017] At the center of the mounting plate 2, a central column 3 is integrally formed vertically downwards. The central column 3 is a hollow cylindrical structure with a pre-drilled rotating hole adapted to the limiting shaft 9. The inner wall of the rotating hole is inlaid with a wear-resistant bearing, which can reduce the friction coefficient between the central column 3 and the limiting shaft 9 and ensure the smooth rotation of subsequent components. At the bottom of the central column 3, an impeller 4 is provided. The impeller 4 includes a circular hub and arc-shaped blades evenly distributed on the outer side of the hub. The blades are made of lightweight, high-strength plastic material, and their curvature has been optimized by fluid dynamics, enabling them to rotate efficiently under the drive of hot air, further accelerating the flow speed of the hot air.
[0018] A booster wheel 5 is located at the bottom of the impeller 4. The diameter of the booster wheel 5 is slightly smaller than that of the impeller 4. Its structure includes an annular disc and straight blades vertically fixed on the disc. The straight blades are evenly distributed along the circumference of the disc. When hot air is accelerated by the impeller 4, it enters the booster wheel 5 area. Through the blocking and guiding effect of the straight blades, the flow direction of the hot air is concentrated, and the radial pressure of the hot air is increased, achieving a preliminary pressurization effect. At the bottom of the booster wheel 5, a filter disc 6 is provided. The filter disc 6 is a circular mesh structure made of stainless steel. It can filter out small impurities carried by the hot air, such as welding residue and dust, to prevent impurities from clogging subsequent parts or affecting the accuracy of operation. It can also play a certain role in equalizing the flow of hot air without significantly hindering the flow of hot air, avoiding uneven local flow velocity.
[0019] A converging hopper 7 is located at the bottom of the filter disc 6. The converging hopper 7 has an inverted conical structure, with its top opening diameter matching that of the filter disc 6, while the bottom opening diameter is designed according to the common operational requirements of hot air guns. This inverted conical structure further concentrates the hot air passing through the filter disc 6, focusing it towards the central area and increasing the local pressure at the outlet. Several pressure-boosting blades 8 are evenly welded onto the inner wall of the converging hopper 7. Figure 4 As shown, the cross-sectional shape of each pressurizing blade 8 is arc-shaped, and the direction of the arc opening is consistent with the direction of hot air flow. The spacing between two adjacent pressurizing blades 8 is equal. The arc-shaped pressurizing blades 8 can guide and compress the hot air as it flows through, further increasing the flow rate and pressure of the hot air. At the same time, through the synergistic effect of each blade, the formation of eddies in the converging hopper 7 can be avoided, ensuring the stability of hot air delivery.
[0020] To achieve precise positioning and stable assembly of the aforementioned components, a limiting shaft 9 is vertically fixed at the center of the gathering hopper 7. The top of the limiting shaft 9 passes sequentially through the central hole of the filter disc 6, the hub center of the booster wheel 5, and the hub center of the impeller 4, ultimately extending into the rotating hole inside the central column 3. The central column 3 and the limiting shaft 9 are rotatably connected via bearings within the rotating hole, ensuring that the impeller 4 and booster wheel 5 can rotate smoothly around the limiting shaft 9 with the flow of hot air. Simultaneously, the filter disc 6, booster wheel 5, and impeller 4 are all detachably connected to the limiting shaft 9 via bolts. Specifically, threaded holes are provided at the corresponding positions of each component on the limiting shaft 9, and mounting holes matching the threaded holes are pre-drilled at the central holes of each component. By passing bolts through the mounting holes and engaging with the threaded holes, each component can be securely fixed to the limiting shaft 9. Furthermore, when a component experiences wear or malfunction, it can be easily disassembled and replaced, reducing maintenance costs.
[0021] The specific working principle is as follows: When the hot air gun is started, hot air enters the nozzle from the rear end of the cylinder 1 and first flows through the impeller 4 area below the mounting plate 2. Because the hot air has a certain flow rate and pressure, it drives the impeller 4 to rotate around the limiting shaft 9. During the rotation, the arc-shaped blades of the impeller 4 generate a forward thrust on the hot air, accelerating its flow speed. Subsequently, the accelerated hot air enters the area of the booster wheel 5. The straight blades of the booster wheel 5 initially compress and guide the hot air, making its flow direction more concentrated and increasing its radial pressure. Next, the hot air passes through the filter disc 6, which filters out tiny impurities and evens out the flow of the hot air, ensuring the uniformity of subsequent hot air delivery. After filtration and even flow, the hot air enters the gathering hopper 7. The inverted conical structure of the gathering hopper 7 gathers the hot air towards the center, while the arc-shaped booster blades 8 on the inner wall further compress and guide the hot air, increasing its flow rate and pressure again. Finally, the hot air is ejected at high speed from the opening at the bottom of the gathering hopper 7, meeting the hot air pressure requirements of different operating scenarios.
[0022] If it is necessary to reduce the hot air delivery pressure, the booster wheel 5 or some of the booster blades 8 can be removed by unscrewing the bolts, reducing the pressurization stage of the hot air during flow. If it is necessary to further increase the pressure, the installation status of the booster wheel 5 and booster blades 8 can be checked to ensure that all components are tightly assembled without loosening or damage. By flexibly adjusting the component assembly method, the hot air pressure can be adjusted as needed, solving the problem that a single air duct in the existing technology cannot adapt to different pressure requirements. At the same time, the double fixing structure of the mounting bracket 10 and the limiting shaft 9 ensures the stability of the nozzle as a whole in high temperature and high speed hot air environment, avoiding safety hazards caused by component displacement or detachment, and improving the safety and reliability of the nozzle.
[0023] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A heat gun anti-scalding nozzle structure, comprising a cylindrical body (1), characterized in that: A connecting component is provided in the middle of the cylinder (1); The connecting assembly includes a mounting plate (2) disposed in the middle of the cylinder (1), a central column (3) disposed in the middle of the mounting plate (2), and an impeller (4) disposed at the bottom of the central column (3). The bottom of the impeller (4) is provided with a booster wheel (5), the bottom of the booster wheel (5) is provided with a gathering bucket (7), and the gathering bucket (7) is provided with a number of booster blades (8).
2. The anti-scalding nozzle structure for a hot air gun according to claim 1, characterized in that: A limiting shaft (9) is fixedly installed in the middle of the gathering hopper (7). One end of the limiting shaft (9) passes through the filter disc (6), the booster wheel (5) and the impeller (4) in sequence and extends to the middle of the central column (3).
3. The anti-scalding nozzle structure for a hot air gun according to claim 2, characterized in that: The central column (3) is rotatably connected to the limiting shaft (9), and the filter disc (6), the booster wheel (5) and the impeller (4) are all detachably connected to the limiting shaft (9) by bolts.
4. The anti-scalding nozzle structure for a hot air gun according to claim 1, characterized in that: The outer side of the mounting plate (2) is provided with several mounting brackets (10), and each mounting bracket (10) is detachably connected to the cylinder (1) by bolts.
5. The anti-scalding nozzle structure for a hot air gun according to claim 2, characterized in that: Each of the multiple pressurizing blades (8) is provided with a filter disc (6) on its top, and the filter disc (6) is sleeved on the outside of the limiting shaft (9).
6. The anti-scalding nozzle structure for a hot air gun according to claim 1, characterized in that: The cross-sectional shape of each of the multiple pressurizing blades (8) is set to arc shape, and the pressurizing blades (8) are welded to the gathering bucket (7).