A wind shield for a carbon dioxide gas shielded welding torch

Abstract

The utility model discloses a kind of windshields of carbon dioxide gas shielded welding's welding gun, including outer cover body and inner cover body, the inner cover body is fixed in the inside of the outer cover body, an air storehouse is formed between the outer cover body and inner cover body, the right side of the air storehouse forms a circular ring-shaped gas outlet, the outside of the outer cover body is provided with the connecting pipe of the air storehouse, high-pressure hose is connected by connecting pipe, the right end of outer cover body is circular aperture, the aperture is coaxial with the gas outlet, the left end of the outer cover body is obliquely provided with a mounting pipe, mounting pipe and the right end surface of the outer cover body form an angle alpha, alpha is 65~75 °, the welding gun of two protective welding is inserted to the inside of the inner cover body after mounting pipe;The device is formed by inner, outer cover body cooperation active airflow protection structure, effectively offset external airflow interference, while guarantee welding gun installation stability, auxiliary weld positioning, improve welding quality and operating convenience.

Description

Technical Field

[0001] This utility model relates to a windproof cover for a welding torch used in carbon dioxide gas shielded welding. Background Technology

[0002] Carbon dioxide gas shielded welding is a welding method that uses carbon dioxide gas as a protective medium. It forms a protective gas curtain at the tip of the welding torch, isolating the molten pool from air and preventing oxidation, thus reducing welding defects. However, in adverse outdoor weather conditions, external airflow can easily disperse the carbon dioxide protective gas curtain around the welding torch, resulting in uneven gas distribution. This exposes the molten pool directly to the air, leading to defects such as porosity and slag inclusions, severely impacting welding quality. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a windproof cover for a welding torch of carbon dioxide gas shielded welding. The inner and outer covers work together to form an active airflow protection structure, which effectively counteracts external airflow interference, while ensuring stable installation of the welding torch, assisting in weld positioning, and improving welding quality and ease of operation.

[0004] To solve the above problems, the present invention adopts the following technical solution:

[0005] A gas shield for a CO2 gas shielded welding torch includes an outer cover and an inner cover. The inner cover is fixed inside the outer cover, and a gas chamber is formed between the outer cover and the inner cover. A circular air outlet is formed on the right side of the gas chamber. A connecting pipe is provided on the outside of the outer cover to connect to the gas chamber, and a high-pressure hose is connected through the connecting pipe. The right end of the outer cover has a circular opening, which is coaxial with the air outlet. An installation pipe is inclinedly provided on the left end of the outer cover, forming an angle α with the right end face of the outer cover, where α is 65~75°. The CO2 welding torch is inserted into the inner side of the inner cover through the installation pipe.

[0006] Preferably, the width of the air chamber gradually decreases towards the air outlet.

[0007] Preferably, an arc-shaped air guide surface is provided on the right side of the outer end face of the inner cover, and under the guidance of the air guide surface, the airflow is blown out at an angle away from the axis of the inner cover.

[0008] Preferably, an arrow is provided on the outer wall of the outer cover, which points to the weld during MIG welding.

[0009] Preferably, a positioning tube is provided inside the inner cover, which is coaxial with the mounting tube. The welding torch passes through the mounting tube and then through the positioning tube. A connecting rod is provided between the positioning tube and the inner cover to improve the stability of the inner cover when subjected to high-pressure gas impact.

[0010] Preferably, a plurality of spherical embedding holes are provided on the right end face of the inner cover, inside the air outlet, and ball bearings are embedded in the embedding holes. Part of the ball bearings protrudes outside the embedding holes. During plate welding, the ball bearings contact the plate being welded to improve the stability of the welding process.

[0011] The beneficial effects of this utility model are:

[0012] 1. Excellent windproof effect: The outer and inner covers work together to form an air chamber, and a high-pressure airflow is blown out through the annular air outlet. The airflow direction is away from the working position of the welding torch, which can directly counteract the external interference airflow, prevent the carbon dioxide protective air curtain from being blown away, effectively reduce the generation of welding porosity, and ensure welding quality.

[0013] 2. High airflow utilization: The structural design of the air chamber gradually narrows towards the air outlet, which allows the gas to be gradually compressed during the flow process. Combined with the guiding effect of the arc-shaped air guide surface, it can form a ring-shaped protective air curtain with stable pressure and controllable direction, thus improving the airflow protection efficiency.

[0014] 3. Stable installation of welding torch: The angle α between the mounting tube and the right end face of the outer cover is set to 65~75°, which is suitable for the optimal welding angle of about 70° for MIG welding; at the same time, the welding torch is double-positioned by the coaxial cooperation of the positioning tube and the mounting tube, which significantly improves the installation stability of the welding torch end and ensures welding accuracy.

[0015] 4. High ease of operation: The marking arrows on the outer wall of the outer casing can accurately guide the weld position even when the view is obstructed, reducing the difficulty of judgment for operators; when welding flat plates, the ball bearings contact and support the plate, allowing the welding torch to be stably suspended at the weld, eliminating the need to manually control the height of the welding torch, simplifying welding operations and lowering the technical threshold.

[0016] 5. Reliable and durable structure: The outer and inner housings are made of lightweight aluminum alloy, combining lightweight and structural strength. The welds are sealed with sealant to prevent air leakage from the air chamber. The ball bearings are installed using a frozen embedding method with a clearance fit design to ensure smooth rolling and secure installation, extending the service life of the device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional view of the device;

[0019] Figure 2 This is a schematic diagram of the air intake and exhaust of this device;

[0020] Figure 3 This is the right view of the device;

[0021] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0022] In the diagram: 1-outer cover, 11-connecting pipe, 12-opening, 121-marking arrow, 13-installation pipe, 2-inner cover, 221-air guide surface, 222-positioning pipe, 223-connecting rod, 224-ball bearing, 3-air chamber, 31-air outlet, 4-welding torch. Detailed Implementation

[0023] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0024] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0025] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, in the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] See Figures 1 to 4 The diagram shows a welding torch wind shield for carbon dioxide gas shielded welding, comprising an outer shield 1 and an inner shield 2. The inner shield 2 is fixed inside the outer shield 1. Both the outer shield 1 and the inner shield 2 are made of lightweight aluminum alloy and are fixed by welding. The weld seams are sealed with sealant to prevent air leakage. An air chamber 3 is formed between the outer shield 1 and the inner shield 2. A circular air outlet 31 is formed on the right side of the air chamber 3. A connecting pipe 11 is provided on the outside of the outer shield 1, connecting to the air chamber 31. A high-pressure hose is connected through the connecting pipe 11. The high-pressure hose is located away from... The end of the connecting pipe 11 is used to connect to high-pressure gas supply equipment, such as a gas pump with a gas storage cylinder. The right end of the outer cover 1 has a circular opening 12, which is coaxial with the gas outlet 31. The left end of the outer cover 1 is provided with an inclined mounting pipe 13, which forms an angle α with the right end face of the outer cover 1. α is 65~75°. When performing CO2 shielded welding, the optimal welding angle is about 70° inclined relative to the welding plane. The welding torch 4 of the CO2 shielded welding passes through the mounting pipe 13 and is inserted into the inner side of the inner cover 2. The mounting pipe 13 and the welding torch 4 are fixed with screws.

[0029] In the above technical solution, the annular air outlet 31 formed by the inner cover 2 and the outer cover 1 can be used with the high-pressure air supply equipment to blow out high-pressure air during welding. The airflow direction is away from the working position of the welding torch, so it can counteract the original external airflow and avoid welding porosity caused by the non-concentration of carbon dioxide.

[0030] See Figure 4 As shown, the width of the air chamber 3 gradually decreases towards the air outlet 31.

[0031] As the gas flows within the gas chamber 3, it is gradually compressed, increasing the outlet pressure. The arc-shaped air guide surface 221 on the right side of the outer end face of the inner cover 2 guides the airflow to tilt away from the axis of the inner cover and blow it out, forming an annular protective air curtain, which effectively counteracts external interference airflow and ensures the concentration of the carbon dioxide protective air curtain.

[0032] See Figure 4As shown, an arc-shaped air guide surface 221 is provided on the right side of the outer end face of the inner cover 2. Under the guidance of the air guide surface 221, the airflow is blown out at an angle away from the axis of the inner cover.

[0033] The air guide surface 221 serves a simple function of sorting and guiding airflow.

[0034] See Figure 3 As shown, an arrow 121 is provided on the outer wall of the outer cover 1. During MIG welding, the arrow points to the weld.

[0035] When this device protects the end of the welding torch, it also obstructs the welding view. Therefore, the aforementioned arrow 121 can guide the forward position of the welding torch.

[0036] See Figure 1 As shown, a positioning tube 222 is provided inside the inner cover 2. The positioning tube 222 is coaxial with the mounting tube 13. The welding torch passes through the mounting tube 13 and then through the positioning tube 222. A connecting rod 223 is provided between the positioning tube 222 and the inner cover 2 to improve the stability of the inner cover 223 when subjected to high-pressure gas impact.

[0037] In the above technical solution, the stability of the end of the welding torch 4 can be further improved by the positioning tube 222, and the end of the positioning tube 222 and the end of the welding torch 4 maintain a gap of about 1 cm.

[0038] See Figure 3 and Figure 4 As shown, a plurality of spherical embedding holes (not shown) are provided on the right end face of the inner cover 2, inside the air outlet 31. A ball bearing 224 is embedded in the embedding hole, and a portion of the ball bearing 224 protrudes to the outside of the embedding hole. During plate welding, the ball bearing 224 contacts the plate being welded to improve the stability of the welding process.

[0039] In the above technical solution, the ball bearing 224 is reduced in volume after freezing and then embedded in the embedding hole to complete the installation of the ball bearing 224. The ball bearing 224 and the embedding hole are fitted with a clearance to ensure that the ball bearing 224 can roll smoothly.

[0040] This technical solution mainly involves using multiple ball bearings 224 to contact the plate being welded during flat plate welding, allowing the welding torch to be stably suspended at the weld seam, simplifying the welding operation, eliminating the need for manual control of the welding torch height, and reducing the difficulty of welding.

[0041] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0042] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0043] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0044] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0046] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A windproof cover for a welding torch used in carbon dioxide gas shielded welding, characterized in that: The device includes an outer cover and an inner cover. The inner cover is fixed inside the outer cover, and an air chamber is formed between the outer cover and the inner cover. A circular air outlet is formed on the right side of the air chamber. A connecting pipe is provided on the outside of the outer cover to connect to the air chamber. A high-pressure hose is connected through the connecting pipe. The right end of the outer cover has a circular opening, which is coaxial with the air outlet. An installation pipe is inclinedly provided on the left end of the outer cover, forming an angle α with the right end face of the outer cover. α is 65~75°. The welding torch for MIG welding passes through the installation pipe and is inserted into the inner side of the inner cover.

2. The welding torch wind shield for carbon dioxide gas shielded welding according to claim 1, characterized in that: The width of the air chamber gradually decreases towards the air outlet.

3. The wind shield for the welding torch of carbon dioxide gas shielded welding according to claim 2, characterized in that: An arc-shaped air guide surface is provided on the right side of the outer end face of the inner cover. Under the guidance of this air guide surface, the airflow is blown out at an angle away from the axis of the inner cover.

4. The wind shield for the welding torch of carbon dioxide gas shielded welding according to claim 1, characterized in that: An arrow is provided on the outer wall of the outer cover, and during MIG welding, the arrow points to the weld.

5. The wind shield for the welding torch of carbon dioxide gas shielded welding according to claim 1, characterized in that: A positioning tube is provided inside the inner cover, which is coaxial with the mounting tube. The welding torch passes through the mounting tube and then through the positioning tube. A connecting rod is provided between the positioning tube and the inner cover to improve the stability of the inner cover when subjected to high-pressure gas impact.

6. The wind shield for the welding torch of carbon dioxide gas shielded welding according to claim 5, characterized in that: Multiple spherical embedding holes are provided on the right end face of the inner cover, inside the air outlet. Ball bearings are embedded in the embedding holes, and some of the ball bearings protrude to the outside of the embedding holes. During plate welding, the ball bearings contact the plate being welded to improve the stability of the welding process.

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