Cooling nozzle and welding gun

Abstract

The utility model discloses a cooling nozzle and a welding gun. The cooling nozzle comprises a connecting seat, a nozzle pipe body and a nozzle head, the connecting base is fixedly installed at the end of the welding gun neck, a water receiving pipe protrudes out of the front end of the connecting base and communicates with a water path of the welding gun neck, and a first water inlet hole and a first water outlet hole are formed in the water receiving pipe. The nozzle pipe body is connected to the connecting base in an inserted mode and comprises an inner pipe and an outer pipe, a water channel is formed between the inner pipe and the outer pipe, the water channel is communicated with the first water inlet hole and the first water outlet hole, and heat exchange cooling of the cooling nozzle is achieved. The nozzle head is detachably installed at the front end of the nozzle pipe body so that the nozzle head can be replaced conveniently.

Description

Technical Field

[0001] This utility model belongs to the field of welding torch technology, specifically relating to a cooling nozzle and a welding torch. Background Technology

[0002] In various welding operations, especially for high-melting-point materials or long-term continuous welding scenarios, welding torch nozzles face severe high-temperature challenges. Traditional air-cooling methods can no longer meet the requirements of modern welding processes and cannot effectively suppress the rapid rise in nozzle temperature. This leads to the deterioration of nozzle material properties, frequent deformation and burn-off, seriously affecting the stability of the welding arc and ultimately resulting in inconsistent weld quality.

[0003] In high-temperature environments, the thermal expansion and contraction cycles of nozzle materials accelerate fatigue damage and shorten their service life. Furthermore, high temperatures accelerate oxidation and corrosion on the nozzle surface, further reducing its performance and durability. These problems not only increase instability during the welding process but also significantly raise production costs and maintenance frequency.

[0004] On the other hand, the replacement structure of existing welding torch nozzles is complex, often relying on specialized tools or cumbersome procedures. This design not only increases equipment maintenance costs but also extends downtime. In a high-efficiency production environment, every minute of downtime can result in significant economic losses. The complex replacement process also increases the risk of operational errors, potentially leading to improper nozzle installation and consequently affecting welding quality.

[0005] Furthermore, traditional nozzle cooling systems are often simply designed and inefficient. Poorly designed cooling water flow channels can easily create localized hot spots, preventing uniform and effective cooling. This not only affects the nozzle's cooling performance but can also increase pressure loss in the cooling water system, thus increasing energy consumption.

[0006] In summary, existing welding torch nozzles perform poorly in high-temperature environments, are difficult to replace and maintain, and have low cooling efficiency, severely limiting the efficient operation of welding. These problems not only affect welding quality and production efficiency but also increase production costs and equipment maintenance difficulty. Therefore, developing a new type of cooling nozzle with high-efficiency cooling capacity, easy maintenance and replacement, and the ability to improve welding quality and efficiency is of great significance for improving welding technology and reducing production costs.

[0007] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0008] To address the problems and shortcomings of the existing technology, this utility model provides a cooling nozzle and welding torch, which have the advantages of efficient cooling, easy maintenance and replacement, and improved welding quality and efficiency.

[0009] This utility model is achieved through the following technical solution:

[0010] A cooling nozzle includes a connecting seat, a nozzle tube body, and a nozzle head. The connecting seat is fixedly installed to the end of the welding torch neck. A water inlet pipe protrudes from the front end of the connecting seat and communicates with the water passage of the welding torch neck. The water inlet pipe has a first water inlet and a first water outlet. The nozzle tube body is inserted into the connecting seat and includes an inner tube and an outer tube, forming a water passage between the inner and outer tubes. The water passage communicates with the first water inlet and the first water outlet, respectively, to achieve heat exchange and cooling of the cooling nozzle. The nozzle head is detachably installed to the front end of the nozzle tube body for easy replacement.

[0011] Furthermore, a U-shaped baffle is provided between the inner and outer pipes, which separates the water passage into an inlet channel and a return channel.

[0012] Furthermore, the inner tube has a second water inlet on the outside of the U-shaped rib and a second water outlet on the inside of the U-shaped rib. The water passage between the second water inlet and the first water inlet is connected, and the water passage between the second water outlet and the first water outlet is also connected.

[0013] Furthermore, there are multiple first water inlets and multiple first water outlets, which are evenly distributed along the circumferential direction of the water inlet pipe. The number of second water inlets is the same as the number of first water inlets, and the number of second water outlets is the same as the number of first water outlets.

[0014] Furthermore, a sealing reversing cylinder is provided between the inner pipe and the water inlet pipe. The sealing reversing cylinder has an inlet annular groove and an outlet annular groove. The sealing reversing cylinder has a third water inlet hole at the inlet annular groove and a third water outlet hole at the outlet annular groove. The third water inlet hole is aligned with the second water inlet hole, and the third water outlet hole is aligned with the second water outlet hole. This eliminates the need to align the nozzle tube and the water inlet pipe at different angles when installing the nozzle tube, thus improving the ease of installation of the nozzle tube.

[0015] Furthermore, a sealing gasket is provided between the sealing reversing cylinder and the inner tube.

[0016] Furthermore, multiple U-shaped ribs are provided, and the U-shaped ribs are evenly distributed along the circumferential direction of the inner tube.

[0017] Furthermore, the nozzle head and the nozzle tube body are connected by threads, and the outer wall of the nozzle head is provided with a twisting cut surface.

[0018] Furthermore, the connecting seat and the welding torch neck are connected by threads, and several anti-slip grooves are provided on the outer side of the connecting seat, which are evenly distributed along the circumferential direction of the connecting seat.

[0019] A welding torch includes a cooling nozzle and a torch neck. The torch neck is provided with an inlet water pipe and a return water pipe. The outlet of the inlet water pipe is a first inlet hole, and the inlet of the return water pipe is a first outlet hole.

[0020] The beneficial effects of this utility model are:

[0021] This application provides a cooling nozzle and its welding torch. The cooling nozzle includes a connecting seat, a nozzle tube body, and a nozzle head. High-efficiency cooling is achieved through a water passage designed between the inner and outer tubes, which connects to the water passage of the welding torch neck. The nozzle head is detachable for easy maintenance and replacement. The rear cooling nozzle can also be quickly replaced; generally, only the nozzle head needs to be replaced, and the cooling nozzle itself does not need to be replaced. This design not only solves the problem of poor performance of traditional nozzles in high-temperature environments but also simplifies the maintenance process, offering advantages such as high-efficiency cooling, easy maintenance and replacement, and improved welding quality and efficiency. Attached Figure Description

[0022] Figure 1 A connection diagram illustrating one embodiment of a cooling nozzle and welding torch in this utility model;

[0023] Figure 2 A cross-sectional view illustrating one embodiment of a cooling nozzle and welding torch in this utility model;

[0024] Figure 3 This is a schematic structural diagram illustrating one embodiment of the connecting seat for a cooling nozzle and a welding torch in this utility model.

[0025] Figure 4 This is a schematic structural diagram illustrating one embodiment of the connecting seat and sealing reversing cylinder of a cooling nozzle and welding torch in this utility model.

[0026] Figure 5 This is a schematic structural diagram illustrating a cross-sectional view of a cooling nozzle and welding torch according to the present invention.

[0027] List of components and reference numerals:

[0028] 1. Connecting seat; 11. Water inlet pipe; 111. First water inlet hole; 112. First water outlet hole; 12. Anti-slip groove; 2. Nozzle body; 21. Inner pipe; 211. Second water inlet hole; 212. Second water outlet hole; 22. Outer pipe; 23. Water passage; 231. Water inlet channel; 232. Water return channel; 24. U-shaped baffle; 3. Nozzle head; 31. Twisting surface; 4. Sealing reversing cylinder; 41. Water inlet annular groove; 42. Water outlet annular groove; 43. Third water inlet hole; 44. Third water outlet hole. Detailed Implementation

[0029] 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.

[0030] It should be noted that the directional terms such as left, right, up, down, front, and back in the embodiments of this utility model are only relative concepts or are based on the normal use state of the product, i.e., the direction of the product's movement, and should not be considered as limiting.

[0031] In addition, it should be noted that the dynamic terms such as "relative motion" mentioned in the embodiments of this utility model not only refer to changes in position, but also include movements such as rotation and rolling in which the position does not change relative to the position, but the state changes.

[0032] Finally, it should be noted that when a component is said to be "located on" or "set on" another component, it can be on the other component or may have an intervening component at the same time. When a component is said to be "connected to" another component, it can be directly connected to the other component or may have an intervening component at the same time.

[0033] In various welding operations, especially for high-melting-point materials or long-term continuous welding scenarios, welding torch nozzles face severe high-temperature challenges. Traditional air-cooling methods have significant limitations and cannot effectively suppress the rapid rise in nozzle temperature. This leads to the degradation of nozzle material performance, frequent deformation and burn-off, severely affecting the stability of the welding arc and ultimately resulting in inconsistent weld quality. Furthermore, the replacement structure of existing welding torch nozzle heads is complex, usually requiring specialized tools or cumbersome procedures. This not only increases equipment maintenance costs but also prolongs downtime, significantly limiting welding efficiency.

[0034] Specifically, these technical problems are particularly prominent in the continuous welding of high-strength steel plates. For example, on an automated welding production line, high-strength steel plates need to be welded continuously for 8 hours. In this high-temperature, high-load working environment, the temperature of a traditional air-cooled nozzle can exceed 600°C in a short time. Due to poor cooling, the nozzle material begins to soften and deform, resulting in uneven wire feeding and an unstable arc. Even a slight change in the nozzle's inner diameter can cause arc deviation, leading to a decline in weld quality. Furthermore, nozzle burnout due to high temperatures may necessitate nozzle replacement every 2-3 hours. However, existing nozzle replacement mechanisms are complex, and each replacement may require 5-10 minutes of downtime, which not only reduces production efficiency but also increases the workload of operators.

[0035] Therefore, the failure to effectively address nozzle cooling and establish a rapid replacement mechanism will severely negatively impact the entire welding process. Firstly, frequent nozzle deformation and burn-out directly lead to unstable weld quality and increased product defect rates. Secondly, frequent nozzle replacements significantly reduce overall production line efficiency and increase production costs. More importantly, these issues limit the application of welding technology in demanding scenarios such as aerospace and high-end equipment manufacturing. Therefore, developing a novel cooling nozzle system that effectively solves the problems of nozzle cooling and rapid replacement is of significant technical importance for improving weld quality, increasing production efficiency, and expanding the application scope of welding technology.

[0036] In welding operations, especially with high-melting-point materials or in prolonged welding scenarios, welding torch nozzles face severe high-temperature challenges. Traditional air-cooling methods cannot effectively suppress the rapid rise in nozzle temperature, leading to degradation of nozzle material properties and frequent problems such as deformation and burn-off, affecting the stability of the welding arc and welding quality. Furthermore, the existing welding torch nozzle head replacement structure is complex, relying on specialized tools or cumbersome operating procedures, increasing equipment maintenance costs and downtime, and limiting welding efficiency.

[0037] To address these issues, this application first considered how to effectively reduce nozzle temperature. Traditional air cooling methods have limited effectiveness, therefore, the focus shifted to exploring water cooling solutions. Water has a much higher specific heat capacity than air, theoretically providing better cooling. However, designing an efficient water cooling system within a limited space remains a key challenge.

[0038] like Figures 1 to 5This application presents an innovative water-cooling structural design. Specifically, a cooling nozzle is designed, comprising a connecting seat 1, a nozzle tube 2, and a nozzle head 3. The connecting seat 1 is fixedly installed to the end of the welding torch neck, with a water inlet pipe 11 protruding from the front end, communicating with the water passage of the welding torch neck. This design ensures that cooling water can directly enter the nozzle system from the welding torch neck, maximizing the utilization of the existing water passage.

[0039] Next, this application considers how to achieve efficient cooling inside the nozzle. To this end, a unique dual-tube nozzle body 2 is designed, including an inner tube 21 and an outer tube 22, with a water channel 23 formed between them. This design not only increases the contact area between the cooling water and the nozzle, but also forms a surrounding cooling system, improving cooling efficiency.

[0040] To further optimize the water flow path, a first inlet hole 111 and a first outlet hole 112 are made on the water inlet pipe 11, and the water passage 23 is connected to these two holes respectively. This design enables rapid water circulation, continuously removes heat, and effectively reduces the nozzle temperature.

[0041] To address the ease of nozzle replacement, this application designs a detachable nozzle head 3. The nozzle head 3 can be easily installed at the front end of the nozzle tube 2, greatly simplifying the replacement process and reducing downtime.

[0042] Therefore, this application proposes a cooling nozzle, including a connecting seat 1, a nozzle tube body 2, and a nozzle head 3. The connecting seat 1 is fixedly installed to the end of the welding torch neck. A water inlet pipe 11 protrudes from the front end of the connecting seat 1, communicating with the water passage of the welding torch neck. The water inlet pipe 11 has a first water inlet hole 111 and a first water outlet hole 112. The nozzle tube body 2 is inserted into the connecting seat 1. The nozzle tube body 2 includes an inner tube 21 and an outer tube 22, forming a water passage 23 between the inner tube 21 and the outer tube 22. The water passage 23 communicates with the first water inlet hole 111 and the first water outlet hole 112, respectively. The nozzle head 3 is detachably installed to the front end of the nozzle tube body 2.

[0043] The connecting seat 1 is a component that is fixedly installed to the end of the welding torch neck, which can be achieved using a threaded connection or a snap-fit ​​connection. The nozzle body 2 is a component that is inserted into the connecting seat 1, which can be achieved using a double-layer structure of an inner tube 21 and an outer tube 22. The nozzle head 3 is a component that can be detachably installed to the front end of the nozzle body 2, which can be achieved using a threaded connection or a quick-release snap-fit ​​connection.

[0044] The core innovation of this application lies in the design of a highly efficient water-cooling structure. Through the combination of the connecting seat 1, nozzle tube 2, and nozzle head 3, rapid circulation of cooling water and effective heat dissipation are achieved. In particular, the double-tube structure of the nozzle tube 2 increases the contact area between the cooling water and the nozzle, forming a surrounding cooling effect and significantly improving cooling efficiency. Simultaneously, the detachable nozzle head 3 simplifies the replacement process and improves maintenance efficiency. Generally, only the replaceable nozzle head 3 needs to be replaced. If the nozzle tube 2 needs to be replaced, simply loosen the cooling nozzle locking nut and directly plug and pull it in for replacement. Compared to traditional cooling nozzles (which generally have inlet / outlet water pipes or positioning devices), this design offers the following advantages: plug-and-play type, no positioning required, simply tighten the locking nut to support the sealing ring, making replacement convenient; no inlet / outlet water pipes, and the water path is integrated with the conductive pipe inside the welding torch neck, reducing the need for a separate water chiller, resulting in a more integrated design and smaller size.

[0045] The working principle of the cooling nozzle is as follows: The connecting seat 1 is fixedly installed at the end of the welding torch neck, and the protruding water inlet pipe 11 at its front end is connected to the water passage of the welding torch neck. The water inlet pipe 11 has a first water inlet hole 111 and a first water outlet hole 112 for the entry and exit of cooling water. The nozzle body 2 is inserted into the connecting seat 1 and consists of an inner tube 21 and an outer tube 22. A water passage 23 is formed between the inner tube 21 and the outer tube 22, which is connected to the first water inlet hole 111 and the first water outlet hole 112 respectively.

[0046] When cooling water flows in from the welding torch neck, it first enters the water inlet pipe 11, and then enters the water passage 23 through the first inlet hole 111. The cooling water flows in the space between the inner pipe 21 and the outer pipe 22, absorbing the heat generated by the nozzle. Afterward, the hot water flows back to the return water pipe of the welding torch neck through the first outlet hole 112. This design allows the cooling water to fully contact most of the nozzle surface, achieving efficient heat dissipation.

[0047] The nozzle head 3 is detachably installed at the front end of the nozzle tube 2 for easy replacement and maintenance. When the nozzle head 3 needs to be replaced, it can be directly removed and replaced with a new nozzle head 3 without replacing the entire nozzle tube 2, thereby reducing maintenance time and costs.

[0048] The nozzle body 2 with a dual-tube structure is chosen to increase the contact area between the cooling water and the nozzle, thereby improving heat exchange efficiency. The water passage 23 between the inner tube 21 and the outer tube 22 forms a closed circulation system, ensuring that the cooling water can be evenly distributed around the nozzle and avoiding local overheating.

[0049] As a preferred embodiment, this application provides a specific example: the connecting seat 1 is made of copper alloy material, with an outer diameter of 30mm and a length of 40mm. The rear end of the connecting seat 1 is provided with an M16×1.5 external thread for connection with the neck of the welding torch. The water inlet pipe 11 protruding from the front end of the connecting seat 1 has a length of 15mm and a diameter of 20mm. Four first water inlet holes 111 and four first water outlet holes 112 are evenly distributed on the water inlet pipe 11, each with a diameter of 2mm.

[0050] The nozzle body 2 consists of an inner tube 21 and an outer tube 22, both made of copper alloy. The inner tube 21 has an outer diameter of 10 mm, an inner diameter of 8 mm, and a length of 80 mm. The outer tube 22 has an inner diameter of 14 mm, an outer diameter of 16 mm, and a length of 75 mm. The water channel 23 formed between the inner tube 21 and the outer tube 22 has a width of 2 mm.

[0051] The nozzle head 3 is made of copper alloy, with a length of 25mm, an outer diameter of 18mm, and an inner diameter of 10mm. The nozzle head 3 is connected to the nozzle tube body 2 via an M18×1 thread.

[0052] During use, cooling water flows through water passage 23 at a flow rate of 4 L / min. Experiments show that after continuous operation for 2 hours at a welding current of 800 A, the surface temperature of the nozzle head 3 remains below 200℃, effectively preventing nozzle deformation and burn-out. Simultaneously, the replacement time for the nozzle head 3 is reduced from 5-10 minutes to less than 1 minute, significantly improving maintenance efficiency.

[0053] This application further proposes a technical solution in which a U-shaped baffle 24 is provided between the inner pipe 21 and the outer pipe 22, and the U-shaped baffle 24 divides the water channel 23 to form an inlet channel 231 and an outlet channel 232.

[0054] This design effectively divides the water channel 23 into an inlet channel 231 and a return channel 232 by setting a U-shaped baffle 24 between the inner pipe 21 and the outer pipe 22. This structural design can significantly improve the flow path of the cooling water and ensure that the cooling water forms a more uniform and efficient circulation inside the nozzle.

[0055] Specifically, the U-shaped baffle 24 causes the cooling water to flow forward through the inlet channel 231 when it enters the nozzle, then turn at the nozzle tip and return through the return channel 232. This design has several key advantages:

[0056] First, the presence of the U-shaped baffle 24 ensures that the inlet and outlet water do not mix directly, thus maintaining the temperature gradient of the cooling water. The cold water can reach the nozzle tip more effectively, absorb heat, and then return through the independent return water channel 232, which greatly improves heat exchange efficiency. It can also force the nozzle inlet water to flow through the very tip of the nozzle before exiting through the return water hole, enhancing the cooling effect on the nozzle.

[0057] Secondly, the U-shaped structure creates a longer water flow path, increasing the contact time and area between the cooling water and the inner wall of the nozzle. This not only improves heat transfer efficiency but also ensures that all parts of the nozzle are adequately cooled, avoiding localized overheating.

[0058] Furthermore, this design optimizes hydrodynamic characteristics while ensuring cooling performance. The U-shaped structure helps reduce water turbulence and pressure loss, allowing cooling water to circulate more smoothly, thereby improving the overall efficiency of the cooling system.

[0059] As a preferred embodiment, the U-shaped baffle 24 can extend axially along the inner tube 21 and fit tightly against the inner tube 21 and the outer tube 22. This design can not only effectively separate water flow, but also enhance the structural strength of the nozzle to a certain extent.

[0060] By adopting this design, the cooling nozzle of this application can maintain more stable performance in high-temperature welding environments. Compared with the traditional straight-through cooling structure, the U-shaped ribs 24 significantly improve cooling efficiency, extend nozzle life, and help maintain a more stable welding arc, thereby improving welding quality.

[0061] The cooling nozzle of this application includes a connecting seat 1, a nozzle tube 2, and a nozzle head 3. The connecting seat 1 is fixedly installed to the end of the welding torch neck. A water inlet pipe 11 protrudes from the front end of the connecting seat 1, communicating with the water passage of the welding torch neck. The water inlet pipe 11 has a first water inlet hole 111 and a first water outlet hole 112. The nozzle tube 2 is inserted into the connecting seat 1. The nozzle tube 2 includes an inner tube 21 and an outer tube 22, forming a water passage 23 between the inner tube 21 and the outer tube 22. The water passage 23 communicates with the first water inlet hole 111 and the first water outlet hole 112, respectively. The nozzle head 3 is detachably installed to the front end of the nozzle tube 2. A U-shaped baffle 24 is provided between the inner tube 21 and the outer tube 22, which divides the water passage 23 into an inlet channel 231 and a return channel 232.

[0062] Specifically, the second water inlet 211 and the second water outlet 212 can be implemented in various ways. For example, the second water inlet 211 can be circular, elliptical, or polygonal, and its diameter or side length can be adjusted according to actual needs, typically between 0.5mm and 5mm. The shape and size of the second water outlet 212 can be the same as or different from the second water inlet 211 to meet different flow rate requirements.

[0063] The positional relationship of these holes is also crucial. The second inlet hole 211 is located on the outside of the U-shaped baffle 24, while the second outlet hole 212 is located on the inside of the U-shaped baffle 24. This arrangement ensures effective separation of cooling water between the inlet channel 231 and the return channel 232. The thickness of the U-shaped baffle 24 can be adjusted as needed, typically between 0.5 mm and 3 mm, to provide sufficient strength and isolation.

[0064] Furthermore, the number and distribution of the second water inlet 211 and the second water outlet 212 are also important considerations. Based on cooling requirements and fluid dynamics principles, multiple second water inlets 211 and second water outlets 212 can be evenly distributed on the inner tube 21 to achieve a more uniform cooling effect. For example, one hole can be provided every 45° or 60° around the circumference of the inner tube 21, with a total of 4, 6, or 8 holes.

[0065] This application further proposes a technical solution in which multiple first water inlets 111 and multiple first water outlets 112 are provided, and they are evenly distributed along the circumferential direction of the water inlet pipe 11. The number of second water inlets 211 is the same as the number of first water inlets 111, and the number of second water outlets 212 is the same as the number of first water outlets 112.

[0066] This technical solution achieves uniform distribution of cooling water within the nozzle tube 2 by setting multiple evenly distributed first water inlet holes 111 and first water outlet holes 112 on the water inlet pipe 11, and setting a corresponding number of second water inlet holes 211 and second water outlet holes 212 on the inner tube 21. This design helps improve the uniformity of the cooling effect, thereby better controlling the temperature distribution of the nozzle.

[0067] Specifically, the first inlet hole 111 and the first outlet hole 112 are evenly distributed along the circumferential direction of the water inlet pipe 11, ensuring uniform flow of cooling water as it enters and exits the nozzle body 2. The number of the second inlet hole 211 and the second outlet hole 212 is the same as the number of the first inlet hole 111 and the first outlet hole 112, further ensuring uniform flow of cooling water inside the nozzle body 2. This design allows the cooling water to be evenly distributed throughout the entire circumference of the nozzle body 2, effectively avoiding problems such as localized overheating or insufficient cooling.

[0068] In practical applications, the number and distribution of inlet and outlet water holes can be adjusted according to the nozzle size and the expected heat load. For example, for larger diameter nozzles, increasing to 6 or 8 inlet and outlet water holes can further improve the uniformity of cooling. For smaller nozzles, 3 inlet and outlet water holes may be sufficient to meet the cooling requirements.

[0069] Compared with existing technologies, the uniformly distributed cooling structure of this application has significant advantages. Traditional cooling nozzles typically have only one or a few inlet and outlet ports, which can easily lead to uneven cooling effects, especially in high-intensity welding operations, potentially causing localized overheating. This application, however, significantly improves this problem through multiple uniformly distributed inlet and outlet ports, enhancing the consistency and reliability of the cooling effect. This not only helps maintain stability during the welding process but also extends the nozzle's lifespan and reduces deformation or damage caused by uneven temperature distribution.

[0070] This application further proposes a technical solution of setting a sealing reversing cylinder 4 between the inner pipe 21 and the water inlet pipe 11. The sealing reversing cylinder 4 has an inlet annular groove 41 and an outlet annular groove 42. The sealing reversing cylinder 4 has a third inlet hole 43 at the inlet annular groove 41 and a third outlet hole 44 at the outlet annular groove 42. The third inlet hole 43 is aligned with the second inlet hole 211, and the third outlet hole 44 is aligned with the second outlet hole 212, so that it is not necessary to align the nozzle tube body 2 with the water inlet pipe 11 at an angle when installing the nozzle tube body 2.

[0071] This design cleverly solves the problem of angular alignment between the nozzle tube 2 and the water inlet pipe 11 by introducing a sealing reversing cylinder 4. The sealing reversing cylinder 4, acting as an intermediate connector, features an annular groove and corresponding inlet / outlet holes, ensuring normal water flow regardless of how the nozzle tube 2 rotates. This structural design greatly simplifies the installation process and improves installation efficiency.

[0072] Specifically, the inlet annular groove 41 and outlet annular groove 42 on the sealing reversing cylinder 4 are connected to the first inlet hole 111 and the first outlet hole 112 of the water receiving pipe 11, respectively. Due to the design of the annular grooves, the water circuit can be kept open regardless of how the sealing reversing cylinder 4 rotates. The third inlet hole 43 and the third outlet hole 44 on the sealing reversing cylinder 4 are aligned with the second inlet hole 211 and the second outlet hole 212 on the inner pipe 21, respectively. This design allows the nozzle tube 2 to be installed at any angle without having to consider the angle alignment with the water receiving pipe 11.

[0073] Furthermore, the design of the sealing reversing cylinder 4 can also improve the sealing performance of the entire cooling system. For example, sealing gaskets can be installed between the sealing reversing cylinder 4 and the inner tube 21, and between the sealing reversing cylinder 4 and the water inlet pipe 11. These sealing gaskets can effectively prevent cooling water leakage and improve cooling efficiency.

[0074] The cooling nozzle proposed in this application effectively improves the sealing effect and prevents cooling water leakage by setting a sealing gasket between the sealing reversing cylinder 4 and the inner tube 21. This design not only enhances the stability of the overall structure but also extends the service life of the nozzle and improves welding efficiency.

[0075] The technical solution of this application, by setting multiple U-shaped baffles 24 between the inner pipe 21 and the outer pipe 22, and ensuring that these U-shaped baffles 24 are evenly distributed along the circumferential direction of the inner pipe 21, can effectively improve the problem of uneven water flow distribution within the water channel 23. Specifically, the arrangement of multiple U-shaped baffles 24 can divide the water channel 23 into multiple independent inlet channels 231 and return channels 232. This structural design has the following advantages:

[0076] First, the uniform distribution of multiple U-shaped baffles 24 ensures the even distribution of water flow inside the nozzle tube 2. Each U-shaped baffle 24 forms a pair of inlet channels 231 and return channels 232, which are evenly distributed around the circumference of the tube, thereby enabling the cooling water to more evenly cover the entire inner wall of the nozzle tube 2.

[0077] Secondly, the arrangement of multiple U-shaped baffles 24 increases the contact area between the water flow and the pipe wall. Since the U-shaped baffles 24 divide the water channel 23 into multiple smaller flow channels, the water flow is forced to flow along these narrow channels, which not only increases the water flow velocity, but also improves the heat exchange efficiency between the water flow and the pipe wall.

[0078] Furthermore, the evenly distributed U-shaped baffles 24 can effectively prevent water flow from stagnating or short-circuiting in certain areas. In a traditional single water channel 23, water flow may tend to follow the path of least resistance, resulting in poor cooling in certain areas. However, multiple evenly distributed U-shaped baffles 24 can force water flow evenly throughout the entire pipe, avoiding this situation.

[0079] Furthermore, this design improves the stability of the entire cooling system. Even if one flow channel becomes blocked or experiences reduced flow, other flow channels can still operate normally, ensuring the continuity and reliability of the cooling effect.

[0080] Furthermore, the nozzle head 3 is connected to the nozzle tube body 2 by a thread, and the outer wall of the nozzle head 3 is provided with a screw-on facet 31. This design makes the installation and disassembly of the nozzle head 3 easier. The threaded connection ensures a secure connection between the nozzle head 3 and the nozzle tube body 2, while also facilitating disassembly. The screw-on facet 31 on the outer wall further improves the ease of operation, allowing operators to more easily hold and rotate the nozzle head 3.

[0081] The connecting seat 1 is threadedly connected to the welding torch neck. Several anti-slip grooves 12 are evenly distributed along the circumferential direction of the connecting seat 1 on its outer side. This improved connecting seat 1 structure, through the threaded connection and the anti-slip grooves 12, effectively solves the problem of unstable connection between the connecting seat 1 and the welding torch neck. The threaded connection provides a reliable fixing method, while the anti-slip grooves 12 further enhance the stability of the connection.

[0082] This application further discloses a welding torch, which includes a cooling nozzle and a torch neck. The torch neck is provided with a water inlet pipe and a water return pipe, the water inlet of which is a first water inlet hole 111, and the water inlet of the water return pipe is a first water outlet hole 112.

[0083] The welding torch proposed in this application forms a closed-loop cooling system by incorporating an inlet and outlet water pipe within the torch neck and connecting them to the water system of the cooling nozzle. This design not only effectively improves the heat dissipation of the welding torch nozzle but also simplifies the replacement process of the nozzle head 3.

[0084] Specifically, the welding torch of this application includes the following main features:

[0085] First, the welding torch neck is equipped with an inlet water pipe and a return water pipe. These two pipes form the backbone of the internal cooling circulation system of the welding torch. The inlet water pipe is responsible for delivering coolant to the nozzle, while the return water pipe is responsible for carrying the coolant that has absorbed heat back to the cooling system for further cooling.

[0086] Secondly, the outlet of the water inlet pipe is designed as a first water inlet 111, and the inlet of the return water pipe is designed as a first water outlet 112. This design makes the connection between the welding torch neck and the cooling nozzle simple and direct. The first water inlet 111 and the first water outlet 112 are respectively connected to the corresponding components of the cooling nozzle, ensuring that the coolant can flow smoothly into and out of the nozzle.

[0087] The nozzle head 3 is detachably mounted on the front end of the nozzle tube 2. This detachable design greatly simplifies the replacement process of the nozzle head 3, eliminating the need to replace the entire nozzle assembly, thereby reducing maintenance costs and downtime.

[0088] The synergy between these features gives the welding torch of this application significant advantages. Coolant enters the cooling nozzle through the inlet pipe, circulates within the nozzle to absorb heat, and then returns to the cooling system through the return pipe. This closed-loop design not only improves cooling efficiency but also avoids coolant waste. Simultaneously, the detachable nozzle head 3 design greatly enhances maintenance convenience.

[0089] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A cooling nozzle, characterized in that, include: A connecting seat is fixedly installed to the end of the welding torch neck. A water inlet pipe protrudes from the front end of the connecting seat and is connected to the water passage of the welding torch neck. A first water inlet hole and a first water outlet hole are provided on the water inlet pipe. The nozzle tube body is inserted into the connector. The nozzle tube body includes an inner tube and an outer tube. A water passage is formed between the inner tube and the outer tube. The water passage is connected to the first water inlet and the first water outlet, respectively. The nozzle head is detachably installed to the front end of the nozzle tube body.

2. A cooling nozzle according to claim 1, characterized in that, A U-shaped baffle is provided between the inner pipe and the outer pipe, and the U-shaped baffle separates the water passage into an inlet channel and an outlet channel.

3. A cooling nozzle according to claim 2, characterized in that, The inner tube has a second water inlet hole on the outside of the U-shaped rib, and a second water outlet hole on the inside of the U-shaped rib. The water passage between the second water inlet hole and the first water inlet hole is connected, and the water passage between the second water outlet hole and the first water outlet hole is also connected.

4. A cooling nozzle according to claim 3, characterized in that, The first water inlet and the first water outlet are provided in multiples, and are evenly distributed along the circumferential direction of the water receiving pipe. The number of the second water inlet is the same as the number of the first water inlet, and the number of the second water outlet is the same as the number of the first water outlet.

5. A cooling nozzle according to claim 3, characterized in that, A sealing reversing cylinder is provided between the inner pipe and the water inlet pipe. The sealing reversing cylinder has an inlet annular groove and an outlet annular groove. The sealing reversing cylinder has a third inlet hole at the inlet annular groove and a third outlet hole at the outlet annular groove. The third inlet hole is aligned with the second inlet hole and the third outlet hole is aligned with the second outlet hole.

6. A cooling nozzle according to claim 5, characterized in that, A sealing gasket is provided between the sealing reversing cylinder and the inner tube.

7. A cooling nozzle according to claim 2, characterized in that, The U-shaped ribs are provided in multiple ways, and the U-shaped ribs are evenly distributed along the circumferential direction of the inner tube.

8. A cooling nozzle according to claim 1, characterized in that, The nozzle head is connected to the nozzle tube body by a thread, and the outer wall of the nozzle head is provided with a twisting cut surface.

9. A cooling nozzle according to claim 1, characterized in that, The connecting seat is connected to the welding torch neck by a thread. Several anti-slip grooves are provided on the outer side of the connecting seat, and the anti-slip grooves are evenly distributed along the circumferential direction of the connecting seat.

10. A welding torch, characterized in that, The welding torch includes a cooling nozzle as described in any one of claims 1 to 9, and the welding torch also includes a welding torch neck, wherein a water inlet pipe and a water return pipe are provided in the welding torch neck, the water outlet of the water inlet pipe is a first water inlet hole, and the water inlet of the water return pipe is a first water outlet hole.

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