Chemical pressure pipeline argon arc welding argon atmosphere forming device

Abstract

The utility model discloses a chemical pressure pipeline argon arc welding argon atmosphere formation device, including walking mechanism that can walk in the pipeline, and walking mechanism includes argon exhaust pipe, a plurality of argon exhaust structures are connected with on the argon exhaust pipe, the gas inlet end and the gas outlet end position of argon exhaust pipe are connected with first plugging air bag and second plugging air bag respectively, and the driving gyro wheel structure is assembled to be connected with on the argon exhaust pipe. The above structure realizes the movement in the pipeline to the welding area in the walking mode, forms the high argon atmosphere after forming the local sealed environment, and the method not only saves argon, and its welding construction difficulty is reduced greatly.

Description

Technical Field

[0001] This utility model belongs to the field of argon arc welding technology for chemical pressure pipelines, and particularly relates to an argon atmosphere forming device for argon arc welding of chemical pressure pipelines. Background Technology

[0002] Pressure pipelines are widely used in chemical equipment. Unlike conventional pipelines, pressure pipelines can pump materials at a certain pressure, including fluids and gases. During the on-site installation of chemical equipment, pressure pipelines often need to be welded on-site as required.

[0003] Argon arc welding (argon arc welding) is a welding method performed in an argon atmosphere. It is widely used in practice because welding in an argon atmosphere not only results in high-strength welded structures and excellent weld quality, but also allows for its application in welding pressure equipment. During argon arc welding, operators typically need to introduce argon gas into the pipe being welded to expel any air inside, thus achieving welding operations in an argon atmosphere.

[0004] However, in actual work, when dealing with pipelines that are long and have large diameters, the amount of argon gas consumed during welding is very large in order to fill the pipeline with argon gas. Since pipeline welding is usually only carried out at a certain point or within a certain distance of the pipeline, it is not necessary to completely fill the entire pipeline with argon gas during actual welding operations.

[0005] However, in actual operation, especially for long pipelines, the welding position is far from the end of the pipeline. Therefore, the only way to operate is to completely fill the pipeline with argon gas (block both ends of the pipeline). This is because it is not easy to create a local argon atmosphere in a local location in the pipeline, especially in the deep part of the pipeline cavity.

[0006] Therefore, it is not convenient to deform the local argon atmosphere. In the actual argon arc welding process, the pipe can only be completely filled with argon, which leads to a very large amount of argon and a very high cost of argon arc welding. Utility Model Content

[0007] Based on the above background, the purpose of this utility model is to provide an argon atmosphere forming device for argon arc welding of chemical pressure pipelines.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A device for forming an argon atmosphere for argon arc welding of a chemical pressure pipeline includes a traveling mechanism capable of moving inside the pipeline. The traveling mechanism includes an argon exhaust pipe, and several argon exhaust structures are connected to the argon exhaust pipe.

[0010] The inlet and outlet of the argon gas exhaust pipe are respectively connected to a first sealing gasbag and a second sealing gasbag.

[0011] The argon exhaust pipe is equipped with a drive roller structure.

[0012] Preferably, the inlet end of the argon exhaust pipe is connected to the first sealing gas bag via a first connecting pipe, and the inlet end of the first sealing gas bag is connected to an external argon gas source via a flexible hose.

[0013] Preferably, the outlet end of the argon exhaust pipe is connected to the inlet end of the second sealing gas bag via a second connecting pipe.

[0014] The second sealing airbag has an outlet end connected to a vent pipe, and the vent pipe is connected to a first solenoid valve.

[0015] Preferably, the top and bottom of the argon exhaust pipe are respectively connected to a plurality of argon exhaust structures;

[0016] The argon gas exhaust structure includes a gas outlet pipe that is detachably connected to and installed on the argon gas exhaust pipe, and the gas outlet end of the gas outlet pipe is connected to a gas outlet nozzle pipe.

[0017] Preferably, the vent pipe is T-shaped and has two vent ends;

[0018] A second solenoid valve is installed and connected to the air outlet pipe.

[0019] Preferably, the drive roller structure includes an angle-adjustable walking bracket, and driven rollers are rotatably connected to both sides of the upper end of the walking bracket;

[0020] The lower ends of the walking support are respectively rotatably connected to active rollers on both sides;

[0021] The drive roller is driven by a transmission structure.

[0022] Preferably, a drive shaft is fixedly connected between the active rollers, and the drive shaft is rotatably connected to the walking bracket;

[0023] The transmission structure includes a driven pulley fixedly mounted on the drive shaft, a pulley motor fixedly connected inside the walking bracket, and a driving pulley fixedly connected to the output shaft of the pulley motor;

[0024] The driven pulley and the driving pulley are connected by a transmission belt.

[0025] Preferably, the walking support is locked after the angle of the locking structure is adjusted.

[0026] Preferably, the locking structure includes bushings that are fixedly connected to both sides of the walking bracket;

[0027] The argon exhaust pipe is fixedly connected to a rotating shaft that is rotatably connected inside a bushing;

[0028] The bushing is threaded with several locking screws that lock the rotating shaft.

[0029] This utility model has the following beneficial effects:

[0030] 1. During the operation, when the entire device moves to the position where welding is required deep in the pipeline, the third solenoid valve is closed, the argon gas source (cylinder) is opened, and argon gas is introduced. The first sealing gasbag gradually expands and then contracts, sealing one side of the pipeline. Argon gas is then introduced and discharged from the argon gas exhaust structure and fills the pipeline, thus purging air from the argon atmosphere area.

[0031] As the first and second sealing gasbags fully expand and block the pipeline, a sealed area is formed between them. After the argon gas venting structure continues to release argon gas for a period of time, a high-concentration argon atmosphere is formed locally in the pipeline, preparing for argon arc welding.

[0032] The above structure enables the creation of a localized argon atmosphere within the pipe in a very ingenious way.

[0033] 2. The above structure creates a localized sealed environment inside the pipe, especially deep inside the pipe, and fills it with argon gas to form a localized high-concentration argon atmosphere. This method not only saves argon gas consumption and reduces welding costs, but also improves the argon gas filling efficiency of argon arc welding and increases the efficiency of argon arc welding.

[0034] 3. By using a drive roller structure, the entire device can roll inside the pipe to the welding position. This allows for autonomous movement to the corresponding position, especially in areas with long pipe lengths or deep within the pipe cavity. This method offers high mobility and flexibility, effectively reducing the difficulty of argon gas operations during argon arc welding.

[0035] 4. The machine adopts a rotating walking frame structure design, which can be rotated according to the pipe diameter so that the roller structure can be pressed against the inner wall of the pipe, enabling the processing of pipes of various diameters. Attached Figure Description

[0036] 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 the structures shown in these drawings without creative effort.

[0037] Figure 1This is a schematic diagram of the overall structure in an embodiment of the present utility model;

[0038] Figure 2 This is a schematic diagram of the structure of the second sealing airbag in an embodiment of this utility model;

[0039] Figure 3 This is a schematic diagram of the venting tube on the second sealing airbag in this embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of the drive roller structure in an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the walking mechanism in an embodiment of the present utility model;

[0042] Figure 6 This is an embodiment of the present utility model. Figure 1 The top view in the image.

[0043] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] 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.

[0045] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0046] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0047] Example 1

[0048] like Figure 1-6 As shown, an argon atmosphere forming device for argon arc welding of chemical pressure pipelines includes a walking mechanism that can move inside the pipeline. The walking mechanism enables the entire device to move deep inside the pipeline to near the argon arc welding area and form a local argon atmosphere inside the pipeline.

[0049] Specifically, the walking mechanism includes an argon exhaust pipe 1, which is connected to several argon exhaust structures 3. Specifically, the top and bottom of the argon exhaust pipe 1 are connected to several argon exhaust structures 3 respectively.

[0050] The argon gas venting structure 3 includes a detachable outlet pipe 31 connected to the argon gas venting pipe 1 (specifically, according to existing methods, a threaded pipe seat is welded to the argon gas venting pipe 1, and the outlet pipe 31 is fastened to the argon gas venting pipe 1 via a threaded connection). The outlet end of the outlet pipe is connected to an outlet nozzle pipe 32. The outlet pipe is T-shaped and has two outlet ends. A second solenoid valve 311 is also mounted and connected to the outlet pipe. The second solenoid valve 311 is a conventional solenoid valve disclosed in the prior art. Preferably, a wirelessly controlled solenoid valve is used.

[0051] Meanwhile, the inlet and outlet ends of the argon gas exhaust pipe 1 are respectively connected to a first sealing gasbag 21 and a second sealing gasbag 22. The first sealing gasbag 21 and the second sealing gasbag 22 are existing rubber gasbags. When argon gas fills the first sealing gasbag 21 and the second sealing gasbag 22, they expand and press against the inner wall of the pipe, forming a locally sealed environment.

[0052] Specifically, the inlet end of the argon gas tube is connected to the first sealing gas bag 21 via a first connecting pipe (specifically, it is connected to the outlet pipe installed on the outlet end of the first sealing gas bag 21 via the first connecting pipe). The inlet end of the first sealing gas bag 21 is connected to an external argon gas source via a flexible hose 4. That is, in the existing method, the inlet end of the first sealing gas bag 21 is connected to an inlet pipe 211, and the flexible hose 4 and the inlet pipe are connected by a detachable connector. For example, in the existing connection method, a connector cap 41 is connected to the flexible hose 4, and the connector cap 41 is threaded to the inlet pipe 211.

[0053] The inlet end of hose 4 is connected to an argon gas source, such as the exhaust pipe of an argon cylinder.

[0054] Similarly, the outlet end of the argon venting pipe 1 is connected to the inlet end of the second sealing gas bag 22 via the second connecting pipe (the connection method is the same as that of the first sealing gas bag 21 mentioned above; specifically, the second connecting pipe is connected to the argon inlet pipe 221 installed at the inlet end of the second sealing gas bag 22); the outlet end of the second sealing gas bag 22 is connected to the vent pipe 222, and the vent pipe 222 is connected to the first solenoid valve 2221.

[0055] Meanwhile, in accordance with the existing method, a third solenoid valve 2211 is connected and installed on the argon gas inlet pipe 221.

[0056] During operation, when the entire device moves to the location requiring welding deep within the pipeline, the third solenoid valve 2211 is closed, and the argon gas source (cylinder) is opened to introduce argon gas. As the argon gas flow increases, the first sealing gasbag 21 gradually expands, sealing one side of the pipeline. At this point, the second solenoid valve 311 is opened, and argon gas continues to flow in. The argon gas is discharged from the argon venting structure 3 and fills the pipeline, gradually purging the air between the first sealing gasbag 21 and the second sealing gasbag 22 (at this time, the second sealing gasbag 22 is not blocked from the pipeline due to the closure of the third solenoid valve 2211). After the air-purged end is filled with argon gas for a period of time, the third solenoid valve 2211 is opened (the first solenoid valve 2221 is closed). With the continuous flow of argon gas, the second sealing gasbag 22 gradually expands and blocks the pipeline. At this time, the first sealing airbag 21 and the second sealing airbag 22 are fully inflated and block the pipeline. Therefore, a sealed area is formed between the first sealing airbag 21 and the second sealing airbag 22. After the argon gas exhaust structure 3 continues to exhaust argon gas for a period of time, a high-concentration argon gas atmosphere is formed locally in the pipeline to prepare for argon arc welding.

[0057] The above structure enables the creation of a localized argon atmosphere within the pipe in a very ingenious way.

[0058] Example 2

[0059] like Figure 1-6 As shown, in this embodiment, based on the structure of Embodiment 1, the first sealing airbag 21 and the second sealing airbag 22 are conventional rubber airbags used in existing argon arc welding. Their air inlet and outlet ends are located at the center of the airbag body and are integrally formed on the airbag body. When air is inflated into the airbag body, the airbag body expands into a disc-shaped sealing structure.

[0060] Meanwhile, the aforementioned first connecting pipe and second connecting pipe are conventional pipes disclosed in the prior art for connecting and connecting pipes on both sides. They adopt a threaded connection method to connect the pipes on the first sealing airbag 21 and the second sealing airbag 22 to the argon exhaust pipe 1.

[0061] In actual operation, the first solenoid valve 2221, the second solenoid valve 311, and the third solenoid valve 2211 mentioned above are conventional wireless remote control valves disclosed in the prior art, which enable operators to open and close the valves wirelessly from outside the pipeline.

[0062] Example 3

[0063] like Figure 1-6 As shown, in this embodiment, based on the structure of embodiment 2, a drive roller structure 5 is assembled and connected to the aforementioned argon exhaust pipe 1. The drive roller structure 5 enables the entire device to roll within the pipe to the welding position.

[0064] Specifically, the drive roller structure 5 includes an angle-adjustable walking bracket 51 (the walking bracket 51 includes bracket parts arranged symmetrically on the left and right sides). According to the existing method, driven rollers 511 are rotatably connected to both sides of the upper end of the walking bracket 51 (specifically, each bracket part is rotatably connected to a driven roller 511).

[0065] Meanwhile, drive rollers 52 are rotatably connected to both sides of the lower end of the walking support 51; the drive rollers 52 are driven by a transmission structure.

[0066] Specifically, according to the existing roller drive method, the aforementioned active rollers 52 are fixedly connected to a drive shaft, which is rotatably connected to the traveling bracket 51 (in the existing method, a matching bearing is installed on the bracket, and the drive shaft is rotatably connected to the bearing).

[0067] The aforementioned transmission structure includes a driven pulley 521 fixedly mounted on a drive shaft, a pulley motor 53 fixedly connected inside the walking bracket 51, and a driving pulley 531 fixedly connected to the output shaft of the pulley motor 53; the driven pulley 521 and the driving pulley 531 are connected by a transmission belt.

[0068] A crossbeam is fixedly connected between the support sections. The crossbeam serves to integrate the two support sections and to fix the pulley motor 53 at the bottom of the crossbeam, thus securing the motor. The pulley motor 53 described above is a conventional small motor disclosed in the prior art.

[0069] In the current method, the motor is powered by a mobile power supply, which can also be fixedly mounted on the crossbeam. During operation, the entire device moves inside the pipe using the above structure. Specifically, the driving roller 52 at the lower end rotates actively, while the driven roller 511 at the upper end rotates in coordination.

[0070] Example 4

[0071] like Figure 1-6As shown, in this embodiment, based on the structure of embodiment 3, the traveling bracket 51 is locked after the angle of the locking structure is adjusted. Specifically, during operation, since the traveling bracket 51 can be flipped, before being placed into the pipe, the traveling bracket 51 is flipped until the driving roller 52 and the driven roller 511 can press against the inner wall of the pipe. After flipping, the traveling bracket 51 is locked and fixed.

[0072] Specifically, the locking structure 54 includes bushings 541 fixedly connected to both sides of the traveling bracket 51 (the traveling bracket 5 has through holes that cooperate with the rotating shaft, the bushings 541 are fixed on the traveling bracket, and the bushing holes coincide with the through holes); a rotating shaft 543 is fixedly connected to the argon exhaust pipe 1 and rotatably connected to the bushings 541; and several locking screws 542 for locking the rotating shafts are threadedly connected to the bushings 541.

[0073] During the flipping process, loosen the locking screw 542 until it no longer presses against the rotating shaft 543. At this point, the operator flips the traveling bracket 51 until the rollers are pressed against the inner wall of the pipe. Then, tighten the locking screw to press it against the rotating shaft.

[0074] In actual operation, each shaft is tightened by three locking screws, so the traveling bracket 51 is not easy to loosen after being locked, and the whole device can travel stably in the pipeline.

[0075] The above structure allows the walking support 51 to be adjusted by rotating it according to the pipe diameter. During the adjustment process, the roller structure at the upper and lower ends of the walking support 51 presses against the inner wall of the pipe. This method can not only be used with pipes of various diameters, but also ensure that the walking structure can move stably inside the pipe.

[0076] Example 5

[0077] like Figure 1-6 As shown, in this embodiment, based on the structure of embodiment 4, the drive roller structure 5 is installed at the center of the entire device during actual operation. Therefore, it will not be unbalanced when moving in the pipe and can move stably in the pipe. The reason is that the active roller 52 and the driven roller 511 are offset, so they can maintain smooth rolling movement.

[0078] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. An argon atmosphere forming device for argon arc welding of chemical pressure pipelines, characterized in that, It includes a walking mechanism that can move inside the pipeline, the walking mechanism including an argon exhaust pipe, and several argon exhaust structures are connected to the argon exhaust pipe; The inlet and outlet of the argon gas exhaust pipe are respectively connected to a first sealing gasbag and a second sealing gasbag. The argon exhaust pipe is equipped with a drive roller structure.

2. The argon atmosphere forming device for argon arc welding of chemical pressure pipelines according to claim 1, characterized in that, The inlet end of the argon exhaust pipe is connected to the first sealing gas bag via a first connecting pipe, and the inlet end of the first sealing gas bag is connected to an external argon gas source via a flexible hose.

3. The argon atmosphere forming device for argon arc welding of chemical pressure pipelines according to claim 1, characterized in that, The outlet end of the argon exhaust pipe is connected to the inlet end of the second sealing gas bag via a second connecting pipe. The second sealing airbag has an outlet end connected to a vent pipe, and the vent pipe is connected to a first solenoid valve.

4. The argon atmosphere forming device for argon arc welding of chemical pressure pipelines according to claim 1, characterized in that, The top and bottom of the argon exhaust pipe are respectively connected to several argon exhaust structures; The argon gas exhaust structure includes a gas outlet pipe that is detachably connected to and installed on the argon gas exhaust pipe, and the gas outlet end of the gas outlet pipe is connected to a gas outlet nozzle pipe.

5. The argon atmosphere forming device for argon arc welding of chemical pressure pipelines according to claim 4, characterized in that, The air outlet pipe is T-shaped and has two air outlet ends. A second solenoid valve is installed and connected to the air outlet pipe.

6. The argon atmosphere forming device for argon arc welding of chemical pressure pipelines according to claim 1, characterized in that, The drive roller structure includes an adjustable walking bracket, with driven rollers rotatably connected to both sides of the upper end of the walking bracket. The lower ends of the walking support are respectively rotatably connected to active rollers on both sides; The drive roller is driven by a transmission structure.

7. The argon atmosphere forming device for argon arc welding of chemical pressure pipelines according to claim 6, characterized in that, A drive shaft is fixedly connected between the active rollers, and the drive shaft is rotatably connected to the walking bracket; The transmission structure includes a driven pulley fixedly mounted on the drive shaft, a pulley motor fixedly connected inside the walking bracket, and a driving pulley fixedly connected to the output shaft of the pulley motor; The driven pulley and the driving pulley are connected by a transmission belt.

8. The argon atmosphere forming device for argon arc welding of chemical pressure pipelines according to claim 7, characterized in that, The walking support is locked after the angle of the locking structure is adjusted.

9. The argon atmosphere forming device for argon arc welding of chemical pressure pipelines according to claim 8, characterized in that, The locking structure includes bushings that are fixedly connected to both sides of the walking bracket. The argon exhaust pipe is fixedly connected to a rotating shaft that is rotatably connected inside a bushing; The bushing is threaded with several locking screws that lock the rotating shaft.

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