Inflation protection device for rotary welding

Abstract

The utility model provides a rotary welding inflation protection device, and relates to the technical field of welding auxiliary equipment. The rotary welding inflation protection device comprises a first sealing assembly and a second sealing assembly, and the first sealing assembly is used for being installed in a first pipe body and is in sealing fit with the first pipe body; the second sealing assembly comprises an inflation pipeline and a sealing piece, the sealing piece is used for being installed in the second pipe body, the periphery of the sealing piece is used for being in sealing fit with the second pipe body, and therefore a sealed space can be formed at the welding position. One end of the inflation pipeline is provided with an air outlet, and the air outlet is used for inflating shielding gas into the sealed space, so that welding protection is carried out. And meanwhile, the sealing piece is rotationally mounted on the inflation pipeline, so that the sealing piece can rotate relative to the inflation pipeline under the conditions that rotary welding is carried out and the first pipe body and the second pipe body rotate, the problems that sealing fails or an air bag is wound when the inflation pipeline rotates are solved, and therefore it is guaranteed that rotary welding is carried out smoothly.

Description

Technical Field

[0001] The utility model relates to the technical field of welding auxiliary equipment, in particular to a rotary welding gas-filled protective device. Background Art

[0002] When welding medium and high alloy steel (including austenitic steel and duplex stainless steel) pipes and fittings, the inner wall (back) should be filled with argon or mixed gas for protection, and the protective gas can be stopped only when the weld thickness is not less than 5mm. The existing inflatable protection device is mainly made of water-soluble paper or steel plate, plastic plate, etc.

[0003] At present, automatic welding is more and more widely used, and stainless steel and alloy steel automatic welding processes are also widely used. Submerged arc automatic welding is a rotary welding process, and the pipe will rotate during the welding process. After the existing fixed inflatable tooling is connected, the air bag will be entangled during the rotation of the pipe, and it is difficult to meet the inflatable protection needs during the rotary welding process. Utility Model Content

[0004] The purpose of the utility model is to provide a rotary welding gas filling protection device, which can perform gas filling protection during the rotary welding process and meet the rotary welding gas filling requirements.

[0005] The embodiments of the present invention can be implemented in the following ways:

[0006] A rotary welding gas-filled protective device is used to assist in the rotary welding of a first tube body and a second tube body; the rotary welding gas-filled protective device comprises:

[0007] a first sealing assembly, the first sealing assembly being used to be installed in the first tube body and to seal with the first tube body; and

[0008] The second sealing component comprises an inflation pipe and a sealing member, wherein the sealing member is rotatably mounted on the inflation pipe and one end of the inflation pipe has an air outlet; the sealing member is used to be mounted in the second tube body, and the outer periphery of the sealing member is used to seal with the second tube body, a sealed space is formed at the welding point between the first tube body and the second tube body by the first sealing component and the sealing member, and the air outlet is used to fill the sealed space with protective gas.

[0009] Optionally, the inflation pipe includes a hollow bolt, a distributor and a rotating connector; the rotating connector is installed on the hollow bolt so that the seal is rotatably connected to the hollow bolt through the rotating connector; the distributor is fixedly connected to one end of the hollow bolt, and the distributor forms the air outlet; the other end of the hollow bolt is used to communicate with an external air source so that the external air source is connected to the distributor through the hollow bolt.

[0010] Optionally, the rotating connecting member includes a bearing member and a limiting nut, the inner ring of the bearing member is fixedly connected to the hollow bolt, the limiting nut is threadedly connected to the hollow bolt, and the sealing member is limited between the limiting nut and the outer ring of the bearing member.

[0011] Optionally, the bearing member is located on a side of the limiting nut away from the distributor.

[0012] Optionally, the sealing member includes a sealing plate, a first rigid plate and a second rigid plate, and the first rigid plate and the second rigid plate are clamped and fixed on both sides of the sealing plate; the radial outer end of the sealing plate is located radially outside the first rigid plate and the second rigid plate, and the radial outer end of the sealing plate is used to seal with the second tube body.

[0013] Optionally, the sealing plate is made of high temperature resistant fluororubber.

[0014] Optionally, the radial outer end of the sealing plate extends obliquely relative to the radial direction of the sealing plate toward a side where the second sealing assembly is located.

[0015] Optionally, the rotary welding inflatable protection device further includes a flexible connector, and two ends of the flexible connector are respectively connected to the first sealing assembly and the second sealing assembly.

[0016] Optionally, the flexible connector is a chain.

[0017] Optionally, the first sealing assembly includes a locking connector, a third rigid plate, a fourth rigid plate and a sealing plate, the third rigid plate and the fourth rigid plate are clamped on both sides of the sealing plate, and the locking connector locks the third rigid plate and the fourth rigid plate together; the radial outer end of the sealing plate is used to seal with the first tube body.

[0018] The beneficial effects of the rotary welding inflatable protection device provided by the embodiment of the utility model include:

[0019] The embodiment of the utility model provides a rotary welding gas-filled protective device, which includes a first sealing component and a second sealing component. The first sealing component is used to be installed in a first tube body and to be sealed with the first tube body; the second sealing component includes an inflation pipe and a seal. The seal is used to be installed in the second tube body, and the outer periphery of the seal is used to be sealed with the second tube body, so that when welding is performed at the joint of the first tube body and the second tube body, a sealed space can be formed at the welding point. One end of the inflation pipe has an air outlet, and the air outlet is used to fill the sealed space with protective gas, so as to perform welding protection. At the same time, the seal is rotatably installed on the inflation pipe, so that when rotary welding is performed and the first tube body and the second tube body are rotated, the seal can rotate relative to the inflation pipe, thereby avoiding problems such as sealing failure or air bag entanglement caused by the rotation of the inflation pipe, thereby ensuring the smooth progress of rotary welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above features and advantages of the present invention can be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or features may have the same or similar reference numerals.

[0021] Figure 1 The overall structural schematic diagram of the rotary welding inflatable protection device provided according to one aspect of the utility model is shown;

[0022] Figure 2 A schematic cross-sectional structure diagram of a second sealing assembly in a rotary welding inflatable protection device provided according to one aspect of the utility model is shown.

[0023] Reference numerals:

[0024] 100-rotation welding inflatable protection device; 110-first sealing assembly; 111-locking nut; 112-locking bolt; 114-fourth rigid plate; 115-second sealing plate; 120-second sealing assembly; 121-inflating pipe; 122-hollow bolt; 123-bearing member; 124-limiting nut; 125-first rigid plate; 126-second rigid plate; 127-first sealing plate; 128-distributor; 130-flexible connector;

[0025] 21-first pipe body; 22-second pipe body; 23-sealed space. DETAILED DESCRIPTION

[0026] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention.

[0027] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", "vertical" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0028] At the same time, it should be noted that the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified or limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, an integral connection, or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or the internal communication of two components, etc. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Figure 1 The overall structural diagram of the rotary welding inflatable protection device 100 provided in this embodiment is as follows: Figure 2 This is a cross-sectional structural diagram of the second sealing component 120 in the rotary welding inflatable protection device 100 provided in this embodiment. Figure 1 and Figure 2 The embodiment of the utility model provides a rotary welding gas-filled protection device 100 , through which the rotary welding gas-filled protection device 100 performs gas-filled protection on the welding point when the first tube body 21 and the second tube body 22 are rotary welded.

[0031] The rotary welding inflatable protection device 100 includes a first sealing component 110 and a second sealing component 120. The first sealing component 110 is used to be installed in the first tube body 21 and is sealed with the first tube body 21. The second sealing component 120 includes an inflatable pipe 121 and a seal. The seal is used to be installed in the second tube body 22, and the outer periphery of the seal is used to be sealed with the second tube body 22. In this way, when welding the joint of the first tube body 21 and the second tube body 22, a sealed space 23 can be formed at the welding point. One end of the inflatable pipe 121 has an outlet, and the outlet is used to fill the protective gas into the sealed space 23, so as to perform welding protection. At the same time, the seal is rotatably installed on the inflatable pipe 121. In this way, when the rotary welding is performed and the first tube body 21 and the second tube body 22 are rotated, the seal can rotate relative to the inflatable pipe 121, thereby avoiding the problems of sealing failure or air bag entanglement caused by the rotation of the inflatable pipe 121, thereby ensuring the smooth progress of the rotary welding.

[0032] Optionally, the protective gas filled through the gas filling pipe 121 may be an inert gas such as argon or a mixed gas.

[0033] The rotary welding gas-filled protective device 100 provided in this embodiment is further described below:

[0034] Please continue to refer to Figure 1 and Figure 2 In this embodiment, the gas charging pipe 121 includes a hollow bolt 122, a distributor 128 and a rotating connector. The distributor 128 is fixedly connected to one end of the hollow bolt 122, and an air outlet is formed on the distributor 128. The other end of the hollow bolt 122 is used to communicate with an external gas source, so that the protective gas in the external gas source can enter the distributor 128 through the internal through hole of the hollow bolt 122, and inflate the sealed space 23 through the air outlet formed by the distributor 128, thereby protecting the welding position. The rotating connector is installed on the hollow bolt 122, so that the seal is rotatably connected to the hollow bolt 122 through the rotating connector, so that when performing rotary welding, the seal can rotate with the pipe to ensure the sealing performance, and the hollow bolt 122 will not rotate with the seal to ensure the stability of the gas charging.

[0035] Specifically, a quick connector is installed at one end of the hollow bolt 122 for communicating with an external gas source, and quick disassembly and assembly with the external gas source is achieved through the quick connector. The distributor 128 is fixed to one end of the hollow bolt 122 by welding, and is communicated with the internal through hole of the hollow bolt 122, and the distributor 128 has uniform dense holes, which form air outlet holes. It can be understood that in some other embodiments, the connection method between the distributor 128 and the hollow bolt 122 can also be specifically set, such as using a screw connection method.

[0036] Furthermore, the rotating connecting member includes a bearing member 123 and a limiting nut 124. The inner ring of the bearing member 123 is connected to the hollow bolt 122. The limiting nut 124 is screwed to the hollow bolt 122, and the sealing member is limited between the limiting nut 124 and the outer ring of the bearing member 123. The outer ring of the bearing member 123 can realize the rotational coordination between the sealing member and the hollow bolt 122 when the sealing member is limited axially (axially of the hollow bolt 122).

[0037] Specifically, the inner ring of the bearing member 123 is rotatably matched with the outer ring, and the inner ring of the bearing member 123 is fixedly connected to the hollow bolt 122 by welding. In order to ensure that the hollow bolt 122 can remain stationary when the seal rotates with the pipe, or in other words, in order to ensure that the seal can smoothly rotate with the pipe when the hollow bolt 122 remains stationary, during installation, the limit nut 124 does not need to press the seal against the bearing member 123, and can only limit the axial position of the seal.

[0038] It should be noted that the structure of the rotational connection is not limited here. It can be understood that in some other embodiments, the rotational connection structure between the seal and the hollow bolt 122 can be specifically set according to needs. For example, the seal is directly fixedly connected to the outer ring of the bearing 123.

[0039] Optionally, the bearing member 123 is located on the side of the limiting nut 124 away from the distributor 128. In this way, during installation, the bearing member 123 is first welded and fixed on the hollow bolt 122, then the sealing member is sleeved on the hollow bolt 122, and the upper limit nut 124 is installed to limit the sealing member, and finally the distributor 128 is welded and fixed on the other end of the hollow bolt 122.

[0040] In this embodiment, the sealing member includes a sealing plate, a first rigid plate 125 and a second rigid plate 126, and the sealing plate is a first sealing plate 127. The first rigid plate 125 and the second rigid plate 126 are clamped and fixed on both sides of the first sealing plate 127. The radial outer end of the first sealing plate 127 is located radially outside the first rigid plate 125 and the second rigid plate 126, and the radial outer end of the sealing end is used to seal with the second tube body 22.

[0041] Specifically, the first sealing plate 127, the first rigid plate 125 and the second rigid plate 126 are all annular, and the radial dimension of the first sealing plate 127 is greater than the radial dimension of the first rigid plate 125 and the second rigid plate 126. In this way, when the first rigid plate 125 and the second rigid plate 126 are clamped on both sides of the first sealing plate 127, the radial outer end of the first sealing plate 127 protrudes relative to the first rigid plate 125 and the second rigid plate 126. In other words, the radial outer end of the first sealing plate 127 is not clamped by the first rigid plate 125 and the second rigid plate 126.

[0042] Optionally, the first sealing plate 127, the first rigid plate 125 and the second rigid plate 126 are fixed together by a locking member. Optionally, the locking member may be a bolt or the like.

[0043] Optionally, the first rigid plate 125 and the second rigid plate 126 are stainless steel thin plates. It is understandable that in some other embodiments, the first rigid plate 125 and the second rigid plate 126 can also be made of other materials as required, such as aluminum plates, etc. Optionally, the material of the first sealing plate 127 is high-temperature resistant fluororubber, which can withstand high temperatures of 150°C to 200°C, so that when the weld that needs to be preheated is inflated for protection, it can also ensure effective protection in a high temperature environment. It is understandable that in some other embodiments, the first sealing plate 127 can also be made of other materials such as rubber as required. For example, when welding does not require preheating, ordinary rubber can also be used to make the first sealing plate 127 for sealing.

[0044] Furthermore, the radial outer end of the first sealing plate 127 extends obliquely toward the side of the second sealing assembly 120 relative to the radial direction of the first sealing plate 127. The radial outer end of the first sealing plate 127 extends obliquely outward, so that the first sealing plate 127 is in a bowl shape, which helps to ensure the sealing effect of the first sealing plate 127.

[0045] In this embodiment, the first sealing assembly 110 includes a locking connector, a third rigid plate (not shown), a fourth rigid plate 114 and a second sealing plate 115. The third rigid plate and the fourth rigid plate 114 are clamped on both sides of the second sealing plate 115, that is, the third rigid plate, the fourth rigid plate 114 and the second sealing plate 115 form a seal structure. The radial outer end of the second sealing plate 115 is used to seal with the first tube 21.

[0046] Optionally, the third rigid plate and the fourth rigid plate 114 are stainless steel thin plates. It is understandable that in some other embodiments, the third rigid plate and the fourth rigid plate 114 can also be made of thin plates of other materials, such as aluminum plates, etc., as required. Optionally, the second sealing plate 115 is a high-temperature resistant fluororubber plate, that is, the material of the second sealing plate 115 is high-temperature resistant fluororubber, so that the second sealing plate 115 can withstand high temperatures of 150°C to 200°C, so that when the weld that needs to be preheated is inflated for protection, it can also ensure effective protection in a high temperature environment. It is understandable that in some other embodiments, the second sealing plate 115 can also be made of other materials such as rubber as required. For example, when welding does not require preheating, the second sealing plate 115 can also be made of ordinary rubber to perform sealing.

[0047] Optionally, the locking connector can be configured to include a locking bolt 112 and a locking nut 111, and the third rigid plate, the second sealing plate 115 and the fourth rigid plate 114 are sleeved on the locking bolt 112, and then the third rigid plate, the second sealing plate 115 and the fourth rigid plate 114 are locked into one by the locking nut 111.

[0048] In this embodiment, the rotary welding inflatable protection device 100 also includes a flexible connector 130, and the two ends of the flexible connector 130 are respectively connected to the first sealing component 110 and the second sealing component 120. In this way, after welding is completed, when the second sealing component 120 is removed from the second tube body 22 by pulling the inflation pipe 121, the first sealing component 110 can be driven out by the flexible connector 130, and the disassembly of the rotary welding inflatable protection device 100 is more convenient.

[0049] Optionally, the flexible connection member 130 is a chain. Before welding, the first sealing component 110 and the second sealing component 120 are respectively installed in the first tube body 21 and the second tube body 22, and then the first tube body 21 and the second tube body 22 are docked. During the docking process, the distance between the first tube body 21 and the second tube body 22 is reduced, and accordingly, the distance between the first sealing component 110 and the second sealing component 120 is reduced. The arrangement of the chain ensures that the distance between the first sealing component 110 and the second sealing component 120 is not affected while ensuring the connection between the first sealing component 110 and the second sealing component 120. When the welding is completed, the second sealing component 120 is removed from the second pipe by pulling the inflation pipe 121. As the second sealing component 120 moves, the distance between the second sealing component 120 and the first sealing component 110 increases until the chain is tightened, thereby applying tension to the first sealing component 110 through the chain, thereby driving the first sealing component 110 to disengage from the first tube body 21 and the second tube body 22, and completing the removal of the rotary welding inflation protection device 100.

[0050] Moreover, through the flexible connector 130, when the first sealing assembly 110 rotates with the first tube body 21, a certain pulling force can be applied to the sealing assembly, further ensuring that the sealing plate rotates with the second tube body 22. At the same time, when the first tube body 21 and the second tube body 22 are arc-shaped, the flexible connector 130 can also well adapt to the position change between the first sealing assembly 110 and the second sealing assembly 120.

[0051] It is understandable that in some other embodiments, other materials may be used to support the flexible connector 130 according to needs, such as rubber material with greater elasticity.

[0052] Specifically, in this embodiment, both ends of the flexible connector 130 are fixedly connected to the second rigid plate 126 and the third rigid plate. Optionally, there are multiple flexible connectors 130, which are evenly distributed around the circumference of the first sealing assembly 110 and the second sealing assembly 120.

[0053] The rotary welding gas-filled protective device 100 provided by the embodiment of the utility model, when in use, firstly install the first sealing component 110 in the first tube body 21, after installation, the first sealing component 110 is coaxially distributed with the first tube body 21, and the radial outer periphery of the second sealing plate 115 is sealed with the inner peripheral wall of the first tube body 21; at the same time, install the second sealing component 120 in the second tube body 22, after installation, the second sealing component 120 is coaxially distributed with the second tube body 22, and the radial outer periphery of the first sealing plate 127 is sealed with the inner peripheral wall of the second tube body 22. Then, the first tube body 21 and the second tube body 22 are butt-jointed, and after butt-jointing, the first sealing component 110 and the second sealing component 120 are located on both sides of the butt joint, and a sealed space 23 is formed at the butt joint by the first sealing component 110 and the second sealing component 120. Then, the shielding gas is filled into the sealed space 23 through the distributor 128, so as to protect the back side during the welding process. During the welding process, the first sealing assembly 110 and the sealing member rotate with the rotation of the first tube body 21 and the second tube body 22, and the charging pipe remains stationary, thereby ensuring the sealing effect and inflation stability, meeting the inflation protection requirements of rotary welding, and ensuring the welding quality. In this way, during the welding process, there is no need for a dedicated person to watch the air bag to prevent entanglement or falling off, which can effectively save labor costs; and the rotary welding inflation protection device 100 has a simple structure and low cost.

[0054] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technology in this field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary welding gas-filled protective device for assisting the rotary welding of a first tube body and a second tube body; characterized in that: The rotary welding gas-filled protective device comprises: a first sealing assembly, the first sealing assembly being used to be installed in the first tube body and to seal with the first tube body; and The second sealing component comprises an inflation pipe and a sealing member, wherein the sealing member is rotatably mounted on the inflation pipe and one end of the inflation pipe has an air outlet; the sealing member is used to be mounted in the second tube body, and the outer periphery of the sealing member is used to seal with the second tube body, a sealed space is formed at the welding point between the first tube body and the second tube body by the first sealing component and the sealing member, and the air outlet is used to fill the sealed space with protective gas.

2. The rotary welding inflatable protection device according to claim 1, characterized in that: The inflation pipe includes a hollow bolt, a distributor and a rotating connector; the rotating connector is installed on the hollow bolt so that the seal is rotatably connected to the hollow bolt through the rotating connector; the distributor is fixedly connected to one end of the hollow bolt, and the distributor forms the air outlet; the other end of the hollow bolt is used to communicate with an external air source so that the external air source is connected to the distributor through the hollow bolt.

3. The rotary welding inflatable protection device according to claim 2, characterized in that: The rotating connecting member includes a bearing member and a limiting nut, the inner ring of the bearing member is fixedly connected to the hollow bolt, the limiting nut is threadedly connected to the hollow bolt, and the sealing member is limited between the limiting nut and the outer ring of the bearing member.

4. The rotary welding gas-filled protective device according to claim 3, characterized in that: The bearing member is located at a side of the limiting nut away from the distributor.

5. The rotary welding inflatable protection device according to claim 1, characterized in that: The sealing member includes a sealing plate, a first rigid plate and a second rigid plate, wherein the first rigid plate and the second rigid plate are clamped and fixed on both sides of the sealing plate; the radial outer end of the sealing plate is located radially outside the first rigid plate and the second rigid plate, and the radial outer end of the sealing plate is used for sealing cooperation with the second tube body.

6. The rotary welding gas-filled protective device according to claim 5, characterized in that: The sealing plate is made of high temperature resistant fluororubber.

7. The rotary welding inflatable protection device according to claim 5, characterized in that: The radial outer end of the sealing plate extends obliquely relative to the radial direction of the sealing plate toward the side where the second sealing assembly is located.

8. The rotary welding inflatable protection device according to claim 1, characterized in that: The rotary welding inflatable protection device also includes a flexible connector, and two ends of the flexible connector are respectively connected to the first sealing component and the second sealing component.

9. The rotary welding inflatable protection device according to claim 8, characterized in that: The flexible connecting piece is a chain.

10. The rotary welding inflatable protection device according to claim 1, characterized in that: The first sealing assembly includes a locking connector, a third rigid plate, a fourth rigid plate and a sealing plate. The third rigid plate and the fourth rigid plate are clamped on both sides of the sealing plate, and the locking connector locks the third rigid plate and the fourth rigid plate together. The radial outer end of the sealing plate is used to seal with the first tube body.

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