Argon filling protection device for metal pipe fitting welding

Abstract

The utility model discloses an argon filling protection device for welding metal pipe fittings, which comprises a hollow cylinder and a limiting piece, the limiting piece comprises a plurality of circular plates with different diameters, threads are distributed on the outer surface of the hollow cylinder, an internal thread hole is formed in the center of each circular plate, each circular plate is respectively matched with the threads of the hollow cylinder, and the hollow cylinder is provided with an internal thread hole. And all the parts can spirally move along the length direction of the hollow cylinder. According to the utility model, the axial distance of each circular plate on the hollow cylinder can be flexibly adjusted according to the size and length of the pipe diameter of the metal pipe fitting to be welded, the connection firmness between the argon filling device and the metal pipe fitting to be welded is improved, the structure is simple, the operation is easy, and the practicability is high. The problems that argon filling is not tight, and an argon filling pipe is not stably placed during argon filling protection welding work are effectively solved, so that the argon filling effect in the welding work is guaranteed, and then the welding quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of argon filling, in particular to an argon filling protection device for metal pipe welding. Background Art

[0002] When performing argon shielded welding operations at the work site, especially when welding metal pipes of various specifications, it is necessary to constantly change the argon filling position and arrange the argon filling starting point, which can easily cause the argon filling device to fall off or burn at high temperature, affecting the welding quality. Utility Model Content

[0003] The utility model provides an argon filling protection device for metal pipe welding which is simple, easy to operate and has greater applicability, and can solve at least one of the above technical problems.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solution: an argon-filled protection device for welding metal pipes, comprising a hollow cylinder and a limiter, wherein the limiter comprises a plurality of circular plates with different diameters, the surface of the hollow cylinder is distributed with threads, and each of the circular plates is provided with an internal thread hole in the center, and each of the circular plates is matched with the thread of the hollow cylinder respectively, and can move spirally along the length direction of the hollow cylinder.

[0005] Furthermore, one end of the hollow cylinder is a free end, the limit piece is sleeved or removed from the free end, and the circular plate whose outer diameter is close to the inner diameter of the metal pipe to be welded follows the free end and extends into the metal pipe to be welded, and the remaining circular plates are spirally moved in turn to the outside of the metal pipe to be welded, and the axial distance between two adjacent circular plates is adjustable.

[0006] Furthermore, the outer diameter of the circular plate inserted into the metal pipe to be welded is smaller than the inner diameter of the metal pipe to be welded.

[0007] Furthermore, the other end of the hollow cylinder is a connecting end, the outside of the connecting end is wrapped with an airtight ring, the connecting end is inserted into the pipe head of the argon filling hose, the airtight ring is clamped between the inner wall of the argon filling hose and the outer wall of the connecting end, and the argon filling hose is connected to the argon storage equipment.

[0008] Furthermore, the hollow cylinder and the limiting member are both made of stainless steel, and the airtight ring is made of rubber.

[0009] Furthermore, the outer diameter of the circular plate can be customized and adjusted according to the inner diameter of the metal pipe to be welded.

[0010] Furthermore, the metal pipe fittings to be welded include at least a metal straight pipe, a metal elbow, a metal tee pipe and a metal pipe seat.

[0011] The beneficial effects of the present invention are as follows:

[0012] 1. The utility model can flexibly adjust the axial distance between each circular plate and the hollow cylinder according to the diameter and length of the metal pipe to be welded, thereby improving the firmness of the connection between the argon filling device and the metal pipe to be welded. It has a simple structure and is easy to operate. It effectively solves the problems of loose argon filling and unstable placement of the argon filling tube during argon shielded welding, thereby ensuring the argon filling effect during welding and thus ensuring the welding quality.

[0013] 2. In the present invention, since the circular plates have a simple structure and low cost, the specific number and outer diameter of each circular plate can be customized and adjusted according to the actual pipe length and inner diameter of the metal pipe to be welded, so as to improve the adaptability of the welding operation and the scope of application of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0015] Figure 1 It is a cross-sectional view of the overall structure of the argon-filled protection device according to an embodiment of the present utility model.

[0016] Figure 2 It is a schematic diagram of the assembly of the argon-filled protection device and the metal straight tube according to an embodiment of the present utility model.

[0017] Figure 3 It is a schematic diagram of the assembly of the argon-filled protection device and the metal elbow according to an embodiment of the present utility model.

[0018] The components in the accompanying drawings are marked as follows: 1. hollow cylinder; 2. limiter; 3. circular plate; 4. airtight ring; 5. argon-filled hose; 6. metal straight pipe; 7. metal elbow. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] It should be noted that the meaning of "and / or" appearing throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or solutions where both A and B are satisfied. In addition, "plurality" means more than two.

[0021] See also Figure 1 An embodiment of the utility model provides an argon-filled protection device for welding metal pipes, comprising a hollow cylinder 1 and a limiter 2, wherein the limiter 2 comprises a plurality of circular plates 3 of different diameters, the outer surface of the hollow cylinder 1 is provided with threads, and each of the circular plates 3 is centrally provided with an internal threaded hole, and each of the circular plates 3 is respectively matched with the thread of the hollow cylinder 1 and can be spirally moved along the length direction of the hollow cylinder 1.

[0022] The utility model can flexibly adjust the axial distance between each circular plate and the hollow cylinder according to the size and length of the metal pipe to be welded, thereby improving the firmness of the connection between the argon filling device and the metal pipe to be welded. It has a simple structure and is easy to operate, and effectively solves the problems of loose argon filling and unstable placement of the argon filling tube during argon shielded welding work, thereby ensuring the argon filling effect during welding work and further ensuring the welding quality.

[0023] See also Figure 1 and Figure 2 In this embodiment, one end of the hollow cylinder 1 is a free end, and the stopper 2 is sleeved or removed from the free end. The circular plate 3, whose outer diameter is close to the inner diameter of the metal pipe to be welded, follows the free end and extends into the metal pipe to be welded. The remaining circular plates 3 are sequentially spirally moved to the outside of the metal pipe to be welded, and the axial distance between two adjacent circular plates 3 is adjustable. With this design, the axial distance between the circular plates 3 located outside the metal pipe to be welded and the circular plates 3 extending into the metal pipe to be welded can be freely adjusted according to the diameter of the metal pipe to be welded. The circular plates 3 act as guides and supports in turn, thereby improving the stability of the fixation between the device and the metal pipe to be welded.

[0024] See also Figure 2 and Figure 3 In this embodiment, the outer diameter of the circular plate 3 inserted into the metal pipe to be welded is smaller than the inner diameter of the pipe. This design prevents welding defects and other problems caused by excessive argon pressure in the later stages of welding, especially when the weld bead reaches the end. For example, using argon filling equipment for national standard pipes with an inner diameter range of 8-50 mm, the difference between the inner and outer diameters is generally set to 3-4 mm.

[0025] See also Figure 1-Figure 3In this embodiment, the other end of the hollow cylinder 1 is a connecting end. The connecting end is wrapped with an airtight ring 4. The connecting end is inserted into the head of the argon-filling hose 5. The airtight ring 4 is sandwiched between the inner wall of the argon-filling hose 5 and the outer wall of the connecting end. The argon-filling hose 5 is connected to the argon storage device. This design not only improves the connection strength between the connecting end and the argon-filling hose 5, but also prevents argon leakage. During actual operation, a stirrup can be added to the outside of the head of the argon-filling hose 5 to further enhance the connection.

[0026] It should be noted that, during the operation of continuous charging of shielding gas for metal pipe welding, in addition to the argon gas described in this embodiment, the present device is also applicable to other shielding gases, which are not listed here one by one.

[0027] See also Figure 1 In this embodiment, the hollow cylinder 1 and the stopper 2 are both made of stainless steel, and the airtight ring 4 is made of rubber. This design is preferably 304 stainless steel to prevent rust from affecting the welded pipes and thus the welding quality, while also ensuring the aesthetics of the device. The rubber is preferably made of a corrosion-resistant material that is both flexible and durable.

[0028] See also Figure 1 In this embodiment, the outer diameter of the circular plate 3 can be customized and adjusted according to the inner diameter of the metal pipe to be welded. This embodiment takes the argon filling work of the national standard pipe with an inner diameter within the range of 10-50mm as an example to illustrate as follows:

[0029] The hollow cylinder 1 has a total length of 130 mm, an inner diameter of φ6 mm, an outer diameter of M8 mm, and a full-length threaded cylinder, with a 30 mm length at the connection end not provided with a thread;

[0030] The plurality of circular plates 3 are respectively composed of circular plates with outer diameters of 10mm, 20mm, 35mm, 50mm, thickness of 4mm, and inner screw holes of M8mm;

[0031] When welding a pipe / pipe fitting with an inner diameter of 20 mm, the distance between the circular plate 3 inserted into the pipe / pipe fitting and the circular plate 3 located outside the pipe / pipe fitting can be adjusted to 30-50 mm, thereby improving the stability of the device when fixed on the pipe fitting to be welded.

[0032] By drawing on the idea of the argon filling device, the outer diameter of the plurality of circular plates 3 can be enlarged to make an argon filling device for national standard pipes within the range of 50-100mm. This device provides a new idea for argon filling of pipes larger than 50mm, with a wider range of applications and greater operational flexibility.

[0033] See also Figure 2 and Figure 3In this embodiment, the metal pipe to be welded includes at least a straight metal pipe 6, a metal elbow 7, a metal tee, and a metal pipe socket. This design selects a circular plate 3 slightly smaller than the inner diameter of the metal pipe to be welded, inserting it into the pipe along with the free end of the hollow cylinder 1. The remaining circular plates 3 rotate along the hollow cylinder 1 and can be tightened against the pipe, ensuring stability during the welding operation.

[0034] In summary, the utility model can flexibly adjust the axial distance between each circular plate and the hollow cylinder according to the diameter and length of the metal pipe to be welded, thereby improving the firmness of the connection between the argon filling device and the metal pipe to be welded. It has a simple structure and is easy to operate, and effectively solves the problems of loose argon filling and unstable placement of the argon filling tube during argon shielded welding, thereby ensuring the argon filling effect during welding and thus ensuring the welding quality.

[0035] At the same time, due to the simple structure and low cost of the circular plates, the specific number and outer diameter of each circular plate can be customized and adjusted according to the actual pipe length and inner diameter of the metal pipe to be welded, so as to improve the adaptability of the welding operation and the applicability of the device.

[0036] It should be understood that the examples and implementation methods described herein are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art may make various modifications or changes based on them. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An argon-filled protective device for metal pipe welding, characterized in that: The invention comprises a hollow cylinder (1) and a limiting member (2), wherein the limiting member (2) comprises a plurality of circular plates (3) with different diameters. The outer surface of the hollow cylinder (1) is provided with threads, and each of the circular plates (3) is provided with an internal thread hole in the center. Each of the circular plates (3) is matched with the thread of the hollow cylinder (1) and can move spirally along the length direction of the hollow cylinder (1).

2. The argon-filled protective device for metal pipe welding according to claim 1, characterized in that: One end of the hollow cylinder (1) is a free end, the limiting member (2) is sleeved or removed from the free end, the circular plate (3) having an outer diameter close to the inner diameter of the metal pipe to be welded follows the free end and extends into the metal pipe to be welded, and the remaining circular plates (3) are spirally moved in sequence to the outside of the metal pipe to be welded, and the axial distance between two adjacent circular plates (3) is adjustable.

3. The argon-filled protective device for metal pipe welding according to claim 2, characterized in that: The outer diameter of the circular plate (3) inserted into the metal pipe to be welded is smaller than the inner diameter of the metal pipe to be welded.

4. The argon-filled protective device for metal pipe welding according to claim 1, characterized in that: The other end of the hollow cylinder (1) is a connecting end, the outside of which is wrapped with an airtight ring (4), and the connecting end is inserted into the pipe head of the argon filling hose (5). The airtight ring (4) is clamped between the inner wall of the argon filling hose (5) and the outer wall of the connecting end, and the argon filling hose (5) is connected to the argon storage device.

5. The argon-filled protective device for metal pipe welding according to claim 4, characterized in that: The hollow cylinder (1) and the limiting member (2) are both made of stainless steel, and the airtight ring (4) is made of rubber.

6. The argon-filled protective device for metal pipe welding according to claim 1, characterized in that: The outer diameter of the circular plate (3) can be customized and adjusted according to the inner diameter of the metal pipe to be welded.

7. The argon-filled protective device for metal pipe welding according to claim 1, characterized in that: The metal pipe fittings to be welded at least include a metal straight pipe (6), a metal elbow (7), a metal tee pipe and a metal pipe seat.

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