P91 pipeline welding inner wall argon filling device

Abstract

The utility model relates to the field of argon filling devices, and discloses a P91 pipeline welding inner wall argon filling device which comprises a welding pipe, abutting plates are arranged at the two ends of the outer side of the welding pipe, a pull rod is slidably connected into the abutting plates, an air pipe is fixedly connected into the pull rod, and a three-way valve is fixedly connected to one end of the air pipe. An argon pipe is fixedly connected to the left end of the three-way valve, an argon tank is fixedly connected to the end, away from the three-way valve, of the argon pipe, a waste gas pipe is fixedly connected to the right end of the three-way valve, an extrusion plate is fixedly connected to the outer side of the pull rod, and silica gel is arranged on the outer side of the pull rod. According to the utility model, the pull rod, the extrusion plate, the silica gel, the baffle plate, the handle, the connecting rod and other structures are matched with one another, so that the argon in the welding pipe is prevented from leaking due to untight sealing in the subsequent welding process, the waste of the argon is effectively avoided, and meanwhile, the subsequent disassembly is convenient.

Description

Technical Field

[0001] The utility model relates to the field of argon filling devices, in particular to an argon filling device for the inner wall of P91 pipeline welding. Background Technique

[0002] In petrochemical engineering, the welding of pipelines made of stainless steel and specific special materials is crucial, and the welding quality directly affects the safe operation of the system. To ensure the welding quality and prevent root oxidation during welding, the method of filling the inert gas argon is usually adopted to isolate the air. Argon is an ideal choice because of its stable properties, non-reactivity with metals, which can effectively prevent oxygen from entering the welding area, protect the molten pool, reduce the generation of oxides, and thus improve the performance and reliability of the welded joint.

[0003] In the prior art, during the argon welding of the inner wall of P91 pipeline, the traditional method is to block both ends of the pipeline with sponges and wrap the weld with adhesive tapes to construct a closed space for continuous argon filling. However, when dealing with the welding of branch pipe platforms, it is difficult to remove the blocking materials, the sealing effect is poor, and gas mixing is likely to occur, thus affecting the stability and controllability of the welding quality.

[0004] In view of the above problems, an argon filling device for the inner wall of P91 pipeline welding is proposed to solve the above problems. Content of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides an argon filling device for the inner wall of P91 pipeline welding, aiming to improve the traditional method in the prior art of blocking both ends of the pipeline with sponges and wrapping the weld with adhesive tapes to construct a closed space for continuous argon filling during the argon welding of the inner wall of P91 pipeline. However, when dealing with the welding of branch pipe platforms, it is difficult to remove the blocking materials, the sealing effect is poor, and gas mixing is likely to occur, thus affecting the stability and controllability of the welding quality.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: An argon filling device for the inner wall of P pipeline welding, including a welding pipe, both ends of the outer side of the welding pipe are provided with abutting plates, a pull rod is slidably connected inside the abutting plates, an air pipe is fixedly connected inside the pull rod, one end of the air pipe is fixedly connected with a three-way valve, the other end of the air pipe is fixedly connected with a joint, the left end of the three-way valve is fixedly connected with an argon pipe, the end of the argon pipe far away from the three-way valve is fixedly connected with an argon gas tank, the right end of the three-way valve is fixedly connected with an exhaust pipe, the end of the exhaust pipe far away from the three-way valve is fixedly connected with an exhaust gas tank, an air pump is arranged on the outer side of the air pipe, an extrusion plate is fixedly connected on the outer side of the pull rod, silica gel is arranged on the outer side of the pull rod, and a locking assembly is arranged on the outer side of the abutting plate, and the locking assembly is used for locking the position of the extrusion plate.

[0007] As a further description of the above technical solution:

[0008] The locking assembly includes a fixed block, the outside of the fixed block is fixedly connected to the outside of the abutting plate, two connecting rods are slidably connected inside the fixed block, a baffle is fixedly connected to one side of the connecting rod, a spring is sleeved on the other side of the connecting rod, a trapezoidal block is fixedly connected to the outside of the baffle, and a handle is fixedly connected to the end of the connecting rod away from the baffle.

[0009] As a further description of the above technical solution:

[0010] A handle is fixedly connected to the outside of the pull rod, and a plurality of jet heads are fixedly connected to one side of the joint.

[0011] As a further description of the above technical solution:

[0012] A joint is fixedly connected to the pull rod near the silica gel end.

[0013] As a further description of the above technical solution:

[0014] The silica gel is located between the abutting plate and the pressing plate, and the outside of the pressing plate is slidably connected inside the welding pipe.

[0015] As a further description of the above technical solution:

[0016] The outside of the baffle is slidably connected inside the fixed block, and the outside of the trapezoidal block is slidably connected inside the fixed block.

[0017] As a further description of the above technical solution:

[0018] One end of the spring is fixedly connected to one side of the baffle, and the other end of the spring is fixedly connected to the inner top wall of the fixed block.

[0019] As a further description of the above technical solution:

[0020] A trapezoidal groove is formed inside the pull rod, and the trapezoidal block is inserted into one of the trapezoidal grooves.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the present utility model, by pulling the handle to move outwards, the pull rod is driven to slide inside, and then the extrusion plate is driven to move, thereby extruding the silica gel to make it closely adhere to the outside. As the pull rod moves, the trapezoidal block moves upwards, driving the baffle, handle and connecting rod to move upwards, compressing the spring until the silica gel is extruded to closely adhere to the outside of the abutting plate. At this time, the trapezoidal block is inserted into one of the trapezoidal grooves for locking, ensuring that during the subsequent welding process, the argon gas inside the welding pipe will not leak due to poor sealing, effectively avoiding the waste of argon gas, and at the same time ensuring convenient disassembly later.

[0023] 2. In the present utility model, by opening the three-way valve, the waste gas pipe is connected to the air pipe. At this time, the air pump is driven to transport the argon gas inside the welding pipe and the harmful gases generated during the welding operation through the jet head, connector, air pipe and waste gas pipe into the waste gas tank, ensuring that the harmful gases generated during the welding process are effectively collected and treated, and avoiding environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional view of an argon filling device for the inner wall of P91 pipeline welding proposed by the present utility model;

[0025] Figure 2 is a schematic structural diagram of the silica gel of an argon filling device for the inner wall of P91 pipeline welding proposed by the present utility model;

[0026] Figure 3 is Figure 2 an enlarged view of part A in

[0027] Legend:

[0028] 1. Welding pipe; 2. Baffle; 3. Pull rod; 4. Handle; 5. Air pipe; 6. Air pump; 7. Waste gas pipe; 8. Argon pipe; 9. Argon gas tank; 10. Waste gas tank; 11. Three-way valve; 12. Silica gel; 13. Extrusion plate; 14. Connector; 15. Jet head; 16. Fixed block; 17. Trapezoidal block; 18. Baffle; 19. Spring; 20. Connecting rod; 21. Handle; 22. Trapezoidal groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0030] Refer to Figure 1 - Figure 3, An embodiment provided by the present utility model: A P91 pipeline welding inner wall argon filling device, including a welding pipe 1, both ends of the outer side of the welding pipe 1 are provided with abutting plates 2, a pull rod 3 is slidably connected inside the abutting plate 2, an air pipe 5 is fixedly connected inside the pull rod 3, one end of the air pipe 5 is fixedly connected with a three-way valve 11, the other end of the air pipe 5 is fixedly connected with a joint 14, the left end of the three-way valve 11 is fixedly connected with an argon pipe 8, one end of the argon pipe 8 away from the three-way valve 11 is fixedly connected with an argon gas tank 9, the right end of the three-way valve 11 is fixedly connected with a waste gas pipe 7, one end of the waste gas pipe 7 away from the three-way valve 11 is fixedly connected with a waste gas tank 10, an air pump 6 is arranged on the outer side of the air pipe 5, an extrusion plate 13 is fixedly connected on the outer side of the pull rod 3, silica gel 12 is arranged on the outer side of the pull rod 3, and a locking assembly is arranged on the outer side of the abutting plate 2, and the locking assembly is used for locking the position of the extrusion plate 13.

[0031] Specifically, when in use, one abutting plate 2 abuts against one end of the welding pipe 1. At this time, pull the handle 4 to move outward, drive the pull rod 3 to slide inside the abutting plate 2, and then drive the extrusion plate 13 to move, and then squeeze the silica gel 12 to make it closely adhere to the outer side of the abutting plate 2. At the same time, lock it through the locking mechanism. Then, in the same way, abut against the other end of the welding pipe 1. At this time, open the three-way valve 11 to connect the argon pipe 8 with the air pipe 5, drive the air pump 6, and spray the argon gas inside the argon gas tank 9 from the argon pipe 8, the air pipe 5 and the joint 14 from the jet head 15, so that the inside of the welding pipe 1 is filled with argon gas. At this time, carry out the welding work on the welding pipe 1. After the work is completed, open the three-way valve 11 to connect the waste gas pipe 7 with the air pipe 5. At this time, drive the air pump 6, and send the argon gas inside the welding pipe 1 and the harmful gases generated by the welding work into the waste gas tank 10 through the jet head 15, the joint 14, the air pipe 5 and the waste gas pipe 7, so as to avoid the harmful gases generated by the welding work from affecting the environment.

[0032] Refer to Figure 1 - Figure 3 , The locking assembly includes a fixed block 16, the outer side of the fixed block 16 is fixedly connected to the outer side of the abutting plate 2, two connecting rods 20 are slidably connected inside the fixed block 16, a baffle 18 is fixedly connected to one side of the connecting rod 20, a spring 19 is sleeved on the other side of the connecting rod 20, a trapezoidal clamping block 17 is fixedly connected to the outer side of the baffle 18, and a handle 21 is fixedly connected to the end of the connecting rod 20 away from the baffle 18.

[0033] Specifically, the pull rod 3 moves, and then the trapezoidal clamping block 17 moves upward, and then drives the baffle 18, the handle 21 and the connecting rod 20 to move upward, and then compresses the spring 19 until the silica gel 12 is squeezed and closely adheres to the outer side of the abutting plate 2. At this time, the trapezoidal clamping block 17 is inserted into one of the trapezoidal grooves 22 for locking.

[0034] Refer to Figure 1 - Figure 3, a handle 4 is fixedly connected to the outside of the pull rod 3, a plurality of jet nozzles 15 are fixedly connected to one side of the joint 14, the joint 14 is fixedly connected to the end of the pull rod 3 close to the silica gel 12, the silica gel 12 is located between the abutting plate 2 and the pressing plate 13, the outside of the pressing plate 13 is slidably connected inside the welding pipe 1, the outside of the baffle 18 is slidably connected inside the fixing block 16, and the outside of the trapezoidal block 17 is slidably connected inside the fixing block 16. One end of the spring 19 is fixedly connected to one side of the baffle 18, and the other end of the spring 19 is fixedly connected to the inner top wall of the fixing block 16. A trapezoidal groove 22 is formed inside the pull rod 3, and the trapezoidal block 17 is inserted into one of the trapezoidal grooves 22.

[0035] Specifically, in the device, the pull rod 3 is controlled by the operator through the handle 4 on the outside to perform a series of actions. The joint 14, arranged at the end of the pull rod 3 close to the silica gel 12, is used to connect the jet nozzles 15, and these jet nozzles 15 are distributed on one side of the joint 14 to provide argon for the welding process. The silica gel 12, as a key sealing material, is located between the abutting plate 2 and the pressing plate 13. When the device operates, the pressing plate 13 slides inside the welding pipe 1 and applies pressure to the silica gel 12 through cooperation with the abutting plate 2 to ensure that it closely adheres to the outside of the welding pipe 1, thereby forming a good seal. The sliding connection between the baffle 18 and the fixing block 16, and the sliding of the trapezoidal block 17 inside the fixing block 16 together form the locking mechanism in the device. When the pull rod 3 is pulled outwards, the trapezoidal block 17 rises and is inserted into the trapezoidal groove 22 to achieve stable locking of the overall device. The role of the spring 19 is to provide the necessary elastic force to ensure that while squeezing the silica gel 12, the baffle 18 can move stably and at the same time maintain the locking state between the trapezoidal block 17 and the trapezoidal groove 22.

[0036] The cooperation between the trapezoidal groove 22 and the trapezoidal block 17 is the key to realizing the locking function of the device. When the trapezoidal block 17 is inserted into the trapezoidal groove 22, it not only fixes the device but also ensures that during the welding process, the sealing effect of the silica gel 12 will not fail due to external force interference.

[0037] Working principle: During the operation, first, a butting plate 2 gently abuts one end of the welding pipe 1 against a specific part of the equipment. Subsequently, the operator pulls the handle 4 located on one side of the equipment outwards, and this action drives the internal pull rod 3 to slide inside the pipe of the butting plate 2. As the pull rod 3 moves, the extrusion plate 13 advances forward, applying pressure to the silica gel 12 attached to the outer part of the pipe of the butting plate 2. At this time, the silica gel 12 expands and tightly adheres to the inner wall of the extrusion plate 13 and the side wall of the baffle 2, ensuring its close fit to the outer side of the pipe body. To achieve precise control of this action, the pull rod 3 is designed with a trapezoidal groove 22, and a trapezoidal block 17 is embedded inside the trapezoidal groove 22. When the pull rod 3 moves, the trapezoidal block 17 also rises, further pushing the baffle 18, the handle 21, and the connecting rod 20 upwards. During this process, the spring 19 is compressed to provide the necessary force to ensure that the silica gel 12 can fully adhere to the outer wall of the pipe of the butting plate 2. After completing the above preparatory steps, the operator needs to repeat the above butting and extrusion processes for the other end of the welding pipe 1. Next, by operating the three-way valve 11, the argon gas pipe 8 is connected to an external gas source, namely the argon gas tank 9. The air pump 6 is started, and through the air pipe 5 and the joint 14, argon gas is ejected from the jet head 15 and filled into the welding pipe 1 to create ideal environmental conditions for the subsequent welding work. After the welding is completed, the operator opens the three-way valve 11 again to make the waste gas pipe 7 communicate with the air pipe 5. Using the air pump 6, the argon gas generated during the welding process and the possible harmful gases are finally introduced into the waste gas tank 10 through the jet head 15, the joint 14, and the air pipe 5, effectively preventing environmental pollution caused by harmful gases.

[0038] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An argon filling device for the inner wall of P91 pipeline welding, comprising a welding pipe (1), characterized in that: Both ends of the outer side of the welded pipe (1) are provided with abutting plates (2). A pull rod (3) is slidably connected inside the abutting plate (2). An air pipe (5) is fixedly connected inside the pull rod (3). One end of the air pipe (5) is fixedly connected with a three-way valve (11). The other end of the air pipe (5) is fixedly connected with a connector (14). The left end of the three-way valve (11) is fixedly connected with an argon pipe (8). One end of the argon pipe (8) far away from the three-way valve (11) is fixedly connected with an argon gas tank (9). The right end of the three-way valve (11) is fixedly connected with a waste gas pipe (7). One end of the waste gas pipe (7) far away from the three-way valve (11) is fixedly connected with a waste gas tank (10). An air pump (6) is arranged outside the air pipe (5). An extrusion plate (13) is fixedly connected outside the pull rod (3). A silica gel (12) is arranged outside the pull rod (3). A locking assembly is arranged outside the abutting plate (2), and the locking assembly is used for locking the position of the extrusion plate (13).

2. The argon filling device for the inner wall of P91 pipeline welding according to claim 1, characterized in that: The locking assembly includes a fixed block (16). The outer side of the fixed block (16) is fixedly connected to the outer side of the abutting plate (2). Two connecting rods (20) are slidably connected inside the fixed block (16). A baffle (18) is fixedly connected to one side of the connecting rod (20). A spring (19) is sleeved on the other side of the connecting rod (20). A trapezoidal block (17) is fixedly connected to the outer side of the baffle (18). A handle (21) is fixedly connected to one end of the connecting rod (20) far away from the baffle (18).

3. The argon filling device for the inner wall of P91 pipeline welding according to claim 1, wherein: A handle (4) is fixedly connected to the outer side of the pull rod (3). A plurality of jet heads (15) are fixedly connected to one side of the connector (14).

4. A P91 pipeline welding inner wall argon filling device according to claim 1, characterized in that: A connector (14) is fixedly connected to one end of the pull rod (3) close to the silica gel (12).

5. The argon filling device for the inner wall of P91 pipeline welding according to claim 1, characterized in that: The silica gel (12) is located between the abutting plate (2) and the extrusion plate (13). The outer side of the extrusion plate (13) is slidably connected inside the welded pipe (1).

6. The argon filling device for the inner wall of P91 pipeline welding according to claim 2, wherein: The outer side of the baffle (18) is slidably connected inside the fixed block (16). The outer side of the trapezoidal block (17) is slidably connected inside the fixed block (16).

7. A P91 pipeline welding inner wall argon filling device according to claim 2, characterized in that: One end of the spring (19) is fixedly connected to one side of the baffle (18), and the other end of the spring (19) is fixedly connected to the inner top wall of the fixed block (16).

8. The argon filling device for the inner wall of P91 pipeline welding according to claim 2, characterized in that: A trapezoidal groove (22) is formed inside the pull rod (3), and the trapezoidal block (17) is inserted into one of the trapezoidal grooves (22).

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