阅读说明：本技术 一种氩弧焊内部充氩保护装置及使用方法 (Argon arc welding internal argon filling protection device and using method ) 是由 白金元 赵飞 胡会丰 于 2019-10-10 设计创作，主要内容包括：本发明提供一种氩弧焊内部充氩保护装置,包括中空的支撑杆,所述支撑杆一端封堵,另一端连接氩气源,所述支撑杆上设置两个气囊,所述气囊充气状态时横截面积大于钢管的内径,所述支撑杆上两个气囊中间位置设有氩气出气口,所述支撑杆上设有伞形支架,所述伞形支架的收口端设置有活动套,所述活动套连接有弹簧,所述弹簧另一端设有固定环,所述固定环固定设置在所述支撑杆上,通过充气的两个气囊在钢管管道内焊口处形成一密闭空间,减少了氩气的使用量,提高了氩气的使用率,降低了施工成本,达到了节能减排的目的。(The invention provides an argon arc welding inner argon filling protection device which comprises a hollow supporting rod, wherein one end of the supporting rod is plugged, the other end of the supporting rod is connected with an argon source, two air bags are arranged on the supporting rod, the cross section area of the air bags in an inflated state is larger than the inner diameter of a steel pipe, an argon gas outlet is arranged in the middle of the two air bags on the supporting rod, an umbrella-shaped support is arranged on the supporting rod, a movable sleeve is arranged at the closing end of the umbrella-shaped support, the movable sleeve is connected with a spring, a fixing ring is arranged at the other end of the spring, the fixing ring is fixedly arranged on the supporting rod, and a closed space is formed at a welding port in the steel pipe pipeline through the two inflated air bags, so that the use amount of argon gas is reduced.)

1. The utility model provides an argon arc welds inside argon filling protection device, a serial communication port, including hollow bracing piece, bracing piece one end shutoff, the argon gas source is connected to the other end, set up two gasbags on the bracing piece, the cross-sectional area is greater than the internal diameter of steel pipe during gasbag inflation state, two gasbag intermediate positions are equipped with the argon gas outlet on the bracing piece.

2. the argon arc welding internal argon filling protection device according to claim 1, wherein a fixing device is arranged on the support rod, the fixing device comprises an umbrella-shaped support fixedly arranged on the support rod, a closing end of the umbrella-shaped support is provided with a movable sleeve, the movable sleeve is connected with a spring, the other end of the spring is provided with a fixing ring, and the fixing ring is fixedly arranged on the support rod.

3. The argon arc welding internal argon filling protection device according to claim 2, wherein the number of the fixing devices is 2, and the fixing devices are respectively arranged on the outer sides of the two air bags.

4. The argon arc welding internal argon filling protection device according to claim 3, wherein an air bag inflation tube is arranged on the inner side of the support rod, one end of the air bag inflation tube is connected with the air bag, and the other end of the air bag inflation tube is connected with a compressed gas source or an inflation device.

5. The argon arc welding internal argon filling protection device according to claim 4, wherein a camera is arranged at the middle position of the two air bags on the supporting rod.

6. the argon arc welds inside argon-filling protection device of claim 5, characterized in that, bracing piece open end connects the spring sleeve, be provided with gasbag gas tube, argon gas pipeline and camera wire in the spring sleeve, gasbag gas tube both ends intercommunication gasbag and compressed gas source or aerating device, argon gas pipeline connection argon gas source and argon gas outlet, the camera wire is connected to the camera.

7. The argon arc welding internal argon filling protection device according to claim 5, wherein a support wheel is arranged on the far end of the umbrella-shaped support and is used for being in rolling contact with the inner wall of the steel pipe.

8. a method for using the argon arc welding internal argon filling protection device in any claim 1 to 7, comprising the steps of,

S1: the two sections of steel pipes to be welded are coaxially abutted together, the umbrella-shaped support is folded and retracted, then the device is integrally placed in the steel pipe pipeline until the two air bags are positioned at two sides of a steel pipe welding opening, the umbrella-shaped support is released, and the umbrella-shaped support is expanded under the action of the spring until the support wheels are abutted against the inner wall of the steel pipe pipeline;

S2: and inflating the air bags through the air bag inflation pipes until the two air bags seal the steel pipe pipeline to form a closed space, inflating argon into the closed space through the argon outlet, and welding the steel pipe pipeline.

9. The use method of claim 8, wherein the center of the positioning device is located at the pipeline welding opening through camera observation, and the welding condition of the steel pipe pipeline welding opening is observed through the camera.

10. The use method of claim 9, further comprising a step S3, wherein after the welding of the pipe-steel tube craters is completed, the air in the air bags is vented, and after the umbrella-shaped support is folded and collected, the umbrella-shaped support is wholly moved out and collected or transported to the next working surface for continuous operation.

Technical Field

The invention belongs to the technical field of steel pipe welding, and particularly relates to an argon-filled protection device in argon arc welding and a using method thereof.

Background

In the process of welding steel pipes, pipelines with high requirements for internal welding quality (such as hydraulic pipelines, thin oil lubrication pipelines, oxygen pipelines and the like) need to be welded by argon arc welding or an electric welding cover surface welding method by argon arc welding, and the biggest defect of argon arc welding steel pipes is that the welding effect is very good in an argon-protected molten pool, on the contrary, black oxidized substances are generated in the argon-unprotected molten pool on the inner wall of the pipeline, the substances are oxides of metallic nickel, are attached to the inside of the pipeline and are difficult to remove by a conventional method, and slowly fall off along with the change of time, so that the cleanliness requirement of the inner wall of the pipeline is seriously influenced.

At present, the method is still a common construction method, but the cost of argon is high, and the waste of large diameter of the pipeline is very serious. Particularly for large-diameter pipeline welding, the argon filling protection cost is higher. Moreover, in the argon filling process, a large amount of argon is directly discharged to the atmosphere from the position of a welding opening, so that the waste is serious, and the argon filling method is not suitable for green construction.

disclosure of Invention

The invention aims at solving the problems in the prior art, namely the invention provides the argon-filled protection device in the argon arc welding and the use method thereof, which can improve the utilization rate of argon, greatly reduce the consumption of the argon in the dental period in the welding process, reduce the cost and realize the purposes of energy conservation and emission reduction.

In order to solve the technical problem, the invention provides an argon arc welding internal argon filling protection device which comprises a hollow support rod, wherein one end of the support rod is plugged, the other end of the support rod is connected with an argon source, two air bags are arranged on the support rod, the cross section area of each air bag is larger than the inner diameter of a steel pipe in an inflation state, and an argon outlet is formed in the middle of each air bag on the support rod.

Preferably, be equipped with fixing device on the bracing piece, fixing device is including fixed the setting umbrella-type support on the bracing piece, umbrella-type support's holding end is provided with the movable sleeve, the movable sleeve is connected with the spring, the spring other end is equipped with solid fixed ring, gu fixed ring is fixed to be set up on the bracing piece.

preferably, the number of the fixing devices is 2, and the fixing devices are respectively arranged at the outer sides of the two air bags.

Preferably, an air bag inflation tube is arranged on the inner side of the support rod, one end of the air bag inflation tube is connected with the air bag, and the other end of the air bag inflation tube is connected with a compressed gas source or an inflation device.

Preferably, a camera is arranged in the middle of the two airbags on the supporting rod.

Preferably, bracing piece open end connecting spring sleeve, be provided with gasbag gas tube, argon gas pipeline and camera wire in the spring sleeve, gasbag gas tube both ends intercommunication gasbag and compressed gas source or aerating device, argon gas source and argon gas outlet are connected to the argon gas pipeline, the camera is connected to the camera wire.

Preferably, the far end of the umbrella-shaped support is provided with a supporting wheel, and the supporting wheel is used for rolling contact with the inner wall of the steel pipe.

The invention also discloses a using method of the argon-filled protection device in the argon arc welding, which comprises the steps of,

S1: the two sections of steel pipes to be welded are coaxially abutted together, the umbrella-shaped support is folded and retracted, then the device is integrally placed in the steel pipe until the two air bags are positioned at two sides of a welded junction of the steel pipe, the umbrella-shaped support is released, and the umbrella-shaped support is expanded under the action of the spring until the support wheels are abutted against the inner wall of the steel pipe;

S2: and inflating the air bags through the air bag inflation pipes until the two air bags seal the steel pipe pipeline to form a closed space, inflating argon into the closed space through the argon outlet, and welding the steel pipe pipeline.

Preferably, the camera is used for observing the position of the center of the positioning device at the welding port of the pipeline, and the camera is used for observing the welding condition of the welding port of the steel pipeline.

Preferably, the method further comprises a step S3, after the welding of the steel pipe welding seam is completed, the air in the air bag is emptied, the umbrella-shaped support is folded and collected, and then the whole umbrella-shaped support is moved out and collected or transferred to the next working surface for continuous operation.

Through the technical scheme, the device forms a closed space in the steel pipe, reduces the using amount of argon, improves the using rate of the argon, reduces the construction cost and achieves the purposes of energy conservation and emission reduction.

drawings

FIG. 1 is a schematic structural diagram of an argon arc welding internal argon-filling protection device according to an embodiment of the present invention;

FIG. 2 is a schematic view of an argon arc welding internal argon-filling protection device according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

In the figure:

1. An air bag inflation tube 2, an argon gas pipeline 3 and a camera lead

4. Spring sleeve 5, camera 6, argon gas outlet

7. air bag 8, umbrella-shaped support 9 and steel pipe

10. Movable sleeve 11, spring 12 and fixing ring

13. Air bag air outlet 14, supporting wheel 15 and supporting rod

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Fig. 1 is a schematic structural diagram of an argon arc welding internal argon filling protection device according to an embodiment of the present invention, fig. 2 is a schematic working principle diagram of an argon arc welding internal argon filling protection device according to an embodiment of the present invention, a dotted line in an umbrella-shaped support 14 is a schematic structural diagram at a maximum opening position, a solid line is a schematic structural diagram at a minimum opening position, fig. 3 is a sectional view a-a in fig. 1, and specifically, as shown in fig. 1 to 3, the present invention discloses an argon arc welding internal argon filling protection device, which includes a hollow support rod 15, one end of the support rod 15 is sealed, the other end is connected with an argon gas source, two air bags 7 are arranged on the support rod 15, a cross-sectional area of the air bags 7 is larger than an inner diameter of a steel pipe 9 in an inflation state, and an argon gas outlet 6 is arranged. When the device is used, the whole device is inserted into a pipeline welding port inside a steel pipe 9 to be welded, the two air bags 7 are respectively positioned at two sides of the pipeline welding port, air is filled in the air bags 7, a small closed space is formed at the pipeline welding port of the steel pipe 9 to serve as a welding operation space, and argon is introduced through the argon outlet 6 on the support rod 15 to provide an argon protection operation environment for the welding operation. Preferably, the material of the air bag is plastic or rubber.

Preferably, a fixing device is arranged on the supporting rod 15, the fixing device comprises an umbrella-shaped support 8 fixedly arranged on the supporting rod 15, a movable sleeve 10 is arranged at the closing end of the umbrella-shaped support 8, the movable sleeve 10 is connected with a spring 11, a fixing ring 12 is arranged at the other end of the spring 11, and the fixing ring 12 is fixedly arranged on the supporting rod 15. It should be noted that the preferred umbrella-shaped support 8 is provided with a plurality of long rods, one end of each long rod is hinged on the support rod 15, the other end is in sliding contact with the inner wall of the steel pipe 9, the long rods are hinged with the short rods, the other ends of the short rods are hinged with the movable sleeves 10, the movable sleeves 10 are sleeved on the supporting rods 15 to slide, the movable sleeves 10 are connected with springs 11, the other ends of the springs 11 are provided with fixing rings 12, the fixing rings 12 are fixedly arranged on the supporting rods 15, the long rods are in the maximum opening angle under the action of the springs 11 in a normal state of the device, the umbrella-shaped support 8 can be folded under the action of external force, namely, the sliding compression spring 11 is arranged on the support rod 15 through the movable sleeve 10, so that the opening angle of the long rod is reduced, the long rod can enter the steel pipes 9 with different pipe diameters, external force is released, the spring 11 releases potential energy to push the long rod to the maximum opening angle and fix the long rod, and the fixation of the device in the steel pipes 9 is completed.

Preferably, the number of the fixing devices is 2, and the fixing devices are respectively arranged on the outer sides of the two airbags 7. According to a further preferred scheme, the terminating ends of the two umbrella-shaped supports 8 face the argon source direction, and after the operation of the welded junction of the steel pipe 9 pipeline is completed, the whole device can be directly dragged to be out of the inner space of the steel pipe 9 pipeline.

Preferably, the inner side of the support rod 15 is provided with an air bag inflation tube 1, one end of the air bag inflation tube 1 is connected with the air bag 7, and the other end is connected with a compressed gas source or an inflation device.

In a preferable scheme, a camera 5 is arranged at the middle position of the two air bags 7 on the support rod 15.

According to the preferable scheme, the opening end of the supporting rod 15 is connected with the spring sleeve 4, the air bag inflation tube 1, the argon gas pipeline 2 and the camera lead 3 are arranged in the spring sleeve 4, the two ends of the air bag inflation tube 1 are communicated with the air bag 7 and the compressed gas source or the inflation device, the argon gas pipeline 2 is connected with the argon gas source and the argon gas outlet 6, and the camera lead 3 is connected with the camera 5. Preferably, the material of the air bag inflation tube 1 and the argon gas pipeline 2 is plastic or rubber.

In a preferable scheme, the far end of the umbrella-shaped support 8 is provided with a supporting wheel 14, and the supporting wheel 14 is used for rolling contact with the inner wall of the steel pipe 9.

The invention also discloses a using method of the argon-filled protection device in the argon arc welding, which comprises the steps of,

S1: the two sections of steel pipes to be welded are coaxially abutted together, the umbrella-shaped support 8 is folded and retracted, then the whole device is placed into the pipeline of the steel pipe 9 until the two air bags 7 are positioned at two sides of the welded junction of the steel pipe 9, the umbrella-shaped support 8 is released, and the umbrella-shaped support 8 is expanded under the action of the spring 11 until the support wheel 14 is abutted against the inner wall of the pipeline of the steel pipe 9;

S2: and inflating the air bags through the air bag inflation pipes until the two air bags seal the steel pipe 9 pipeline to form a closed space, inflating argon into the closed space through the argon outlet, and welding the steel pipe 9 pipeline.

According to the preferable scheme, the center of the positioning device is located at the position of the welded opening of the steel pipe 9 pipeline through the camera, and the welding condition of the welded opening of the steel pipe 9 pipeline is observed through the camera.

Preferably, the method further comprises the step S3 of emptying the gas in the air bag after the welding of the pipeline welded junctions of the steel pipes 9 is finished, folding and retracting the umbrella-shaped support, and then integrally moving the umbrella-shaped support out and collecting or transferring the umbrella-shaped support to the next working surface for continuous operation.

According to the preferable scheme, after the operation of the welded junction of the steel pipe 9 pipeline is finished, the welding condition of the welded junction inside the steel pipe 9 pipeline can be observed through the camera 5, if the defects such as incomplete welding, air holes and the like exist, the welding can be continued after the back chipping by using an angle grinder, and the operation quality is improved.

Through the technical scheme, the working principle of the device is that two air bags are utilized to form a closed space in a pipeline to serve as a welding operation space of a pipeline welding port, the using amount of argon is reduced, the using rate of the argon is improved, the construction cost is reduced, the purposes of energy conservation and emission reduction are achieved, meanwhile, after the operation is completed, the device can be conveniently packed up or transferred to the next operation surface, the device is simple to operate, the applicability is high, the umbrella-shaped support can change the size of the support diameter through the pressure of the spring, the welding operation can be carried out on steel pipes with various pipe diameters, the working efficiency is high, and the operation intensity is reduced.

The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.