A welding positioning gas-filled protection device

Abstract

This invention discloses a welding positioning gas-filled protective device for positioning a filler ring on a pressure-resistant shell. The pressure-resistant shell is a hollow cylinder, and the filler ring is disposed at one axial end of the hollow cylinder. The welding positioning gas-filled protective device includes: a positioning ring disposed at the end of the pressure-resistant shell, for abutting against the axial upper end face of the filler ring and against the inner circumferential surface of the filler ring; and a gas-filled assembly sleeved on the pressure-resistant shell, for abutting against the axial upper end face of the positioning ring to press the positioning ring tightly onto the filler ring, and against the outer circumferential surface of the filler ring; wherein, the positioning ring, the gas-filled assembly, and the pressure-resistant shell form a gas-filled cavity, the filler ring is disposed within the gas-filled cavity, and the gas-filled assembly is provided with a gas-filled channel connecting an external gas source and the gas-filled cavity. By implementing the technical solution of this invention, the welding filler ring is positioned by the positioning ring and the gas-filled assembly, which improves the installation efficiency of the filler ring. At the same time, the gas-filled cavity provides sufficient protective gas during welding.

Description

Technical Field

[0001] This invention relates to the field of welding equipment, and more particularly to a welding positioning gas-filled protection device. Background Technology

[0002] During use, the pressure housing of the control rod drive mechanism needs to be replaced according to the on-site conditions. Before installing the new pressure housing, the spare parts and the filler ring need to be positioned and spot-welded to fix them, and then assembled and autofusion welded. To ensure the autofusion welding effect after the components are assembled, the concentricity and flatness of the filler ring and the pressure housing are required, and the spot welding points must be of good quality to avoid affecting the final weld quality. This requires positioning the filler ring during the welding process to ensure a good fit between the filler ring and the pressure housing. In the existing technology, there is no positioning structure between the filler ring and the pressure housing, which easily leads to filler ring misalignment during welding, resulting in low installation efficiency. At the same time, the open argon filling method cannot provide sufficient welding shielding gas for welding. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a welding positioning gas-filled protection device.

[0004] The technical solution adopted by the present invention to solve its technical problem is as follows: a welding positioning and inflation protection device is provided for positioning a filling ring on a pressure-resistant shell, wherein the pressure-resistant shell is a hollow cylinder, and the filling ring is disposed at one axial end of the hollow cylinder; the welding positioning and inflation protection device includes: a positioning ring disposed at the end of the pressure-resistant shell for abutting against the axial upper end face of the filling ring and against the inner circumferential surface of the filling ring; and an inflation assembly sleeved on the pressure-resistant shell, wherein the inflation assembly abuts against the axial upper end face of the positioning ring to press the positioning ring tightly onto the filling ring and abuts against the outer circumferential surface of the filling ring; wherein the positioning ring, the inflation assembly, and the pressure-resistant shell form an inflation cavity, the filling ring is disposed within the inflation cavity, and the inflation assembly is provided with an inflation channel connecting an external air source and the inflation cavity.

[0005] Preferably, the positioning ring includes: a positioning centering section inserted into the pressure-resistant shell; a connecting section extending from the side of the positioning centering section in a direction away from the pressure-resistant shell, the connecting section being used to abut against the outer peripheral surface of the filling ring; and a clamping section disposed on the side of the connecting section away from the positioning centering section, for abutting against the axial upper end face of the positioning ring, the clamping section having welding holes corresponding to the welding positions of the filling ring and the end of the pressure-resistant shell.

[0006] Preferably, the connecting segment includes a plurality of spaced connecting posts, and a welding hole is formed between two adjacent connecting posts, wherein the welding hole is a gate-shaped hole.

[0007] Preferably, the inflation assembly includes: an inflation cover, which is detachably installed at the end of the pressure-resistant shell and positions the positioning ring at the end of the pressure-resistant shell; the inflation cover has an air outlet at a position corresponding to the welding hole; an inflation channel is formed inside the inflation cover; and the air outlet communicates with the inflation cavity and the inflation channel respectively.

[0008] Preferably, the inflatable outer cover includes: a sleeve section fitted around the periphery of the pressure-resistant shell end; an inflatable section disposed near the filling ring and connected to the sleeve section, wherein an air outlet is provided on the inner wall of the inflatable section, an inflation interface is provided on the outer wall of the inflatable section, and an inflation channel is formed within the inflatable section that communicates with the air outlet and the inflation interface respectively; and a pressing section connected to one end of the inflatable section opposite to the sleeve section, wherein the pressing section is used to abut against the axial upper end face of the positioning ring and the outer peripheral surface of the filling ring respectively.

[0009] Preferably, the end of the sleeve section that connects to the pressure-resistant shell is provided with a plurality of shrinkage grooves along the circumferential direction, and the shrinkage grooves extend along the axial direction.

[0010] Preferably, the inflation channels are a first inflation channel and a second inflation channel, and the inflation section includes: a first inflation part, disposed near the outer periphery of the filling ring, the first inflation part having the air outlet, and the first inflation channel formed within the first inflation part; a second inflation part, disposed around the first inflation part, the second inflation part having the inflation interface, and the second inflation channel formed within the second inflation part; and an air guide hole, connecting the first inflation part and the second inflation part.

[0011] Preferably, the inflation ports are a first inflation port and a second inflation port, which are disposed opposite to each other on the outer wall of the inflation section; the inflation assembly further includes a first air inlet pipe, a second air inlet pipe and a third air inlet pipe; the first air inlet pipe is connected to the first inflation port; the second air inlet pipe is connected to the second inflation port; one end of the third air inlet pipe is connected to an air source, and the other end is connected to the first air inlet pipe and the second air inlet pipe through a T-connector.

[0012] Preferably, the welding positioning gas-filled protection device further includes an adjustment component disposed on the gas-filled assembly for adjusting the position between the filling ring and the pressure-resistant shell.

[0013] Preferably, the adjustment assembly includes: an axial adjustment assembly disposed on the pressing section for axially pressing the filling ring to adjust the axial position between the filling ring and the pressure-resistant shell; and a circumferential adjustment assembly disposed on the pressing section for radially pressing the filling ring to adjust the radial position between the filling ring and the pressure-resistant shell.

[0014] Preferably, the upper axial end face of the pressing section is provided with an axial positioning groove, which penetrates the pressing section in the axial direction; the inner wall of the pressing section is provided with a circumferential positioning groove; the axial adjustment component includes: an axial positioning key disposed in the axial positioning groove; and an axial positioning screw connected to the axial positioning key for moving the axial positioning key in the axial direction to adjust the position of the axial positioning key pressing the filling ring in the axial direction; the circumferential adjustment component includes: a circumferential positioning key disposed in the circumferential positioning groove; and a circumferential positioning screw connected to the circumferential positioning key for moving the circumferential positioning key radially to adjust the radial position of the filling ring.

[0015] The technical solution of the present invention has the following beneficial effects: when welding the filler ring, the positioning ring and the gas filling component are used for welding positioning, which improves the installation efficiency of the filler ring. At the same time, the gas filling chamber provides sufficient welding protective gas during welding. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0017] Figure 1 This is an installation diagram of the welding positioning gas-filled protection device provided by the present invention;

[0018] Figure 2 This is a structural schematic diagram of the welding positioning gas-filled protection device provided by the present invention from one angle;

[0019] Figure 3 This is a schematic diagram of the inflation component of the welding positioning inflation protection device provided by the present invention;

[0020] Figure 4 This is a schematic diagram of the positioning ring of the welding positioning gas-filled protection device provided by the present invention;

[0021] Figure 5 This is a cross-sectional view of the inflation component of the welding positioning inflation protection device provided by the present invention;

[0022] Figure 6 This is a cross-sectional view of the welding positioning and inflation protection device provided by the present invention installed on a pressure-resistant shell;

[0023] Figure 7This is a cross-sectional view of the positioning ring assembly of the welding positioning and inflation protection device provided by the present invention. Detailed Implementation

[0024] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0025] A component is referred to as being "fixed to" or "set on" another component, and it may be located directly or indirectly on that other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to that other component.

[0026] The terms “up,” “down,” “left,” “right,” “front,” “back,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” indicate directions or positions based on those shown in the accompanying drawings.

[0027] The terms "axial" and "radial" refer to the length of the entire device or component as "axial" and the direction perpendicular to the axial direction as "radial".

[0028] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or specifying the number of technical features. "Multiple" means two or more, unless otherwise explicitly defined.

[0029] The terms used above are for ease of description only and should not be construed as limitations on this technical solution.

[0030] like Figure 1 and Figure 6 The image shows a welding positioning and inflation protection device in an embodiment of the present invention. This device is used to position the filling ring 100 on the pressure-resistant shell 101, thereby facilitating the subsequent welding and fixing of the filling ring 100 to the pressure-resistant shell 101.

[0031] The filling ring 100 is disposed at one axial end of the pressure-resistant shell 101. The welding positioning and inflation protection device includes a positioning ring 102 and an inflation assembly 103. The positioning ring 102 is inserted into the pressure-resistant shell 101 and abuts against the axial upper end face of the filling ring 100, thereby positioning the filling ring 100 at the end face of the pressure-resistant shell 101 and abutting against the inner circumferential surface of the filling ring 100. The inflation component 103 is sleeved on the pressure-resistant shell 101 and is used to abut against the outer end face of the positioning ring 102, thereby pressing the positioning ring 102 against the filling ring 100 and preventing axial movement of the filling ring 100. The inflation component 103 is used to abut against the outer peripheral surface of the filling ring 100, thereby working together with the positioning ring 102 to achieve radial positioning of the filling ring 100. The upper end face refers to the end face of the filling ring 100 away from the pressure-resistant shell 101, the outer peripheral face refers to the surface of the filling ring 100 away from the pressure-resistant shell 101, and the inner peripheral face refers to the surface of the filling ring 100 close to the pressure-resistant shell 101.

[0032] Furthermore, the positioning ring 102, the inflation component 103, and the pressure-resistant shell 101 form an inflation cavity, and the filling ring 100 is disposed in the inflation cavity. The inflation component 103 is provided with an inflation channel that connects an external gas source and the inflation cavity. The external gas source can be a protective gas such as argon, which can prevent oxidation of the weld area during the welding process. Through the inflation cavity, the filling ring 100 can be inflated and protected while the filling ring 100 is positioned.

[0033] The welding positioning and inflation protection device provided in this embodiment presses the filling ring 100 against the pressure shell 101 by the positioning ring 102 abutting against the upper end face of the filling ring 100 and the inflation component 103 abutting against the axial upper end face of the positioning ring 102, thus preventing axial movement of the filling ring 100. Furthermore, the positioning ring 102 abutting against the inner circumferential surface of the filling ring 100 and the inflation component 103 abutting against the outer circumferential surface of the filling ring 100, thus preventing radial movement of the filling ring 100. Moreover, the positioning ring 102, the inflation component 103, and the pressure shell 101 can form an inflation cavity, which can inflate and protect the filling ring 100 while positioning the filling ring 100, solving the technical problem that the existing filling ring 100 and pressure shell 101 are prone to displacement during welding, and has high installation efficiency.

[0034] In some embodiments, such as Figure 1 and Figure 4 As shown, the positioning ring 102 includes a positioning and centering section 7, a connecting section, and a clamping section 4. The positioning and centering section 7 is used to insert into the pressure housing 101. One end of the clamping section 4 is used to abut against the axial upper end face of the filling ring 100, for pressing the filling ring 100 onto the pressure housing 101. The connecting section extends from the side of the positioning and centering section 7 in a direction away from the pressure housing 101, and this connecting section connects the positioning and centering section 7 and the clamping section 4.

[0035] In some embodiments, such as Figure 1 As shown, the positioning center section 7 is inserted into the pressure-resistant shell 101, wherein the outer diameter of the positioning center section 7 is slightly smaller than the inner diameter of the pressure-resistant shell 101.

[0036] Of course, in other embodiments, the centering positioning section 7 can be set as a disc with an outer diameter slightly smaller than the inner diameter of the pressure shell 101. A fixed wristband is set at the center of the disc, which can facilitate the disassembly of the positioning ring 102. At the same time, the wristband can be used to apply force to the positioning ring 102 to initially adjust the filling ring 100.

[0037] like Figure 4 As shown, the connecting section includes multiple spaced-apart connecting posts 20, which are disposed on the positioning and centering section 7 and connected to the pressing section 4. Preferably, the distance between any two adjacent connecting posts 20 is equal. Further, each connecting post 20 is provided with a positioning platform 24, which is disposed on the outer side of the connecting post 20 and is used to abut against the inner circumferential surface of the filling ring 100 to radially position the filling ring 100 and prevent the filling ring 100 from moving radially.

[0038] In some embodiments, such as Figure 4 and Figure 6 As shown, the clamping section 4 is annular in shape. The outer diameter of the clamping section 4 is smaller than the outer diameter of the pressure-resistant shell 101, and the inner diameter is larger than the inner diameter of the pressure-resistant shell 101. A chamfered surface 23 is provided on the outer side of the contact position between the clamping section 4 and the filling ring 100. The chamfered surface 23 provides a certain installation space for the outer contact position between the clamping section 4 and the filling ring 100.

[0039] In some embodiments, such as Figure 2 and Figure 4 As shown, the clamping section 4 is provided with welding holes 3 at intervals along its circumference. The welding holes 3 are located at the positions corresponding to the welding of the pressure shell 101 and the filling ring 100, and the pressure shell 101 and the filling ring 100 are welded together through the welding holes 3. There is one welding hole 3 between each adjacent connecting post 20, and the welding hole 3 is a portal hole.

[0040] Furthermore, in another embodiment, the number of welding holes 3 between adjacent connecting columns 20 can also be set to two or more.

[0041] In some embodiments, such as Figure 1 and Figure 2As shown, the inflation assembly 103 includes an inflatable outer cover 1, an air outlet 6, and a quick-release locking structure 105. The inflatable outer cover 1 is a hollow cylinder and is connected to the pressure-resistant shell 101, used to press the positioning ring 102 onto the end of the pressure-resistant shell 101. The air outlet 6 is located on the inner side of the inflatable outer cover 1 for gas output. The quick-release locking structure 105 is sleeved at the connection between the inflatable outer cover 1 and the pressure-resistant shell 101, used to fix the inflatable outer cover 1 to the pressure-resistant shell 101.

[0042] Furthermore, in some other embodiments, the inflatable outer cover 1 may be a cube with an axially through-hole.

[0043] In some embodiments, such as Figure 3 and Figure 6 As shown, the inflatable outer cover 1 is made of transparent PC material, allowing observation of the positioning effect of the filling ring 100. The inflatable outer cover 1 may include a connecting section 116, an inflation section 115, and a pressing section 117. The connecting section 116 is fitted around the end of the pressure-resistant shell 101 to connect the inflatable outer cover 1 to the pressure-resistant shell 101. The inflation section 115 is connected to the connecting section 116 on the side near the filling ring 100. The outer wall of the inflation section 115 is provided with inflation ports, namely a first inflation port 25 and a second inflation port 26. The first inflation port 25 and the second inflation port 26 are positioned opposite each other on the outer wall of the inflation section 115, allowing protective gas to flow in. An outlet 6 is located on the inner wall of the inflation section 115, allowing the protective gas to be sequentially discharged to the periphery of the filling ring 100 through the first inflation port 25, the second inflation port 26, and the outlet 6. The pressing section 117 is located on the side of the inflation section 115 away from the sleeve section, and is used to press the positioning ring 102 onto the pressure-resistant shell 101.

[0044] In some embodiments, such as Figure 1 As shown, the sleeve section 116 is a hollow cylinder. The sleeve section 116, including the end connected to the pressure-resistant shell 101, has several shrinkage grooves 16 arranged circumferentially. These shrinkage grooves 16 extend axially. A quick-release locking structure 105 is installed on the sleeve section 116 at the location of the shrinkage grooves 16. By changing the internal space of the shrinkage grooves 16 through the quick-release locking structure 105, the inflatable outer cover 1 is fixed to the pressure-resistant shell 101. The shrinkage grooves 16 radially penetrate the inflatable outer cover 1, and the axial length of the shrinkage grooves 16 is less than the length of the sleeve section 116.

[0045] Furthermore, in some other embodiments, the sleeve section 116 is uniformly provided with a plurality of radial threaded holes in its circumference. Matching screws are installed in the radial threaded holes, and the screws generate radial force on the pressure-resistant shell 101 to fix the inflatable outer cover 1 to the pressure-resistant shell 101. At the same time, a rubber sleeve is installed at the connection end between the screw and the pressure-resistant shell 101 to prevent the screw from damaging the outer surface of the pressure-resistant shell 101 during use.

[0046] In some embodiments, such as Figure 1 and 5 As shown, the inflation section 115 includes a first inflation part 17, a second inflation part 18, and a vent. The first inflation part 17 is disposed on the outer periphery of the filling ring 100, and a vent 6 is provided at a corresponding position on the first inflation part 17 and the filling ring 100. The second inflation part 18 is connected to the first inflation part 17, and the vent is located at the connection position between the second inflation part 18 and the first inflation part 17 to conduct airflow between the first inflation part 17 and the second inflation part 18. The second inflation part 18 is connected to both the first inflation port 25 and the second inflation port 26. Protective gas is introduced into the second inflation part 18 from the first inflation port 25 and the second inflation port 26, introduced into the first inflation part 17 through the vent, and then discharged to the welding position of the filling ring 100 through the vent 6.

[0047] In some embodiments, such as Figure 1 and Figure 2 As shown, the inflation assembly 103 also includes a first air inlet pipe 11, a second air inlet pipe 12, and a third air inlet pipe 13. The first inflation port 25 is connected to the first air inlet pipe 11 via a quick-connect fitting, and the second inflation port 26 is connected to the second air inlet pipe 12 via a quick-connect fitting. The first air inlet pipe 11 and the second air inlet pipe 12 are connected to the third air inlet pipe 13 via a T-joint 14. The third air inlet pipe 13 is connected to an external air source. During welding, the external air source is turned on, and protective gas enters the inflation section 115 from the first inflation port 25 and the second inflation port 26 via the second air inlet pipe 12 and the third air inlet pipe 13 at the T-joint 14.

[0048] In some embodiments, such as Figure 1 , Figure 4 and Figure 5 As shown, the pressing section 117 is set on the inflation section 115. A circumferential boss 22 is provided on the inner peripheral wall of the pressing section 117. The circumferential boss 22 is pressed on the positioning ring 102. The sleeve section 116 is sleeved on the pressure-resistant shell 101, so that an inflation cavity for welding inflation is formed between the positioning ring 102, the pressure-resistant shell 101 and the inflation cover 1.

[0049] Furthermore, in some other embodiments, the connection end between the pressing section 117 and the positioning ring 102 can also be pressed onto the positioning ring 102 by reducing the inner diameter, wherein a rubber ring can be provided at the pressing position.

[0050] In some embodiments, such as Figure 1 As shown, the upper end of the pressing section 117 is also provided with three axial positioning grooves. The axial positioning grooves are evenly arranged on the pressing section 117, and the axial positioning grooves penetrate the pressing section 117 upward along the axial direction.

[0051] Furthermore, in other embodiments, the axial positioning grooves may be provided in four or any other number greater than two.

[0052] In some embodiments, such as Figure 5 As shown, the inner wall of the pressing section 117 is provided with a circumferential positioning groove 28, and the circumferential positioning keys 19 are evenly installed in the circumferential positioning groove 28 to radially position the filling ring 100.

[0053] In some embodiments, such as Figure 1 As shown, the quick-release locking structure 105 includes a quick-release strap 8, a buckle 9, and a hook 10. The quick-release strap 8 is long and narrow, with a buckle 9 installed at one end and a hook 10 installed at the other end. By using the hook 10 and the buckle 9 together, the quick-release strap 8 is circumferentially installed at the position of the shrink groove 16, thereby fixing the inflatable outer cover 1 to the pressure-resistant shell 101.

[0054] In some embodiments, such as Figure 2 and Figure 3 As shown, the adjustment assembly 104 is mounted on the inflation assembly 103 and is used to adjust the position between the filling ring 100 and the pressure-resistant shell 101. Specifically, the adjustment assembly 104 includes an axial adjustment assembly 106 and a circumferential adjustment assembly 120. The axial adjustment assembly 106 is mounted in the axial positioning groove and is used to adjust the axial position of the filling ring 100. The circumferential adjustment assembly 120 is mounted in the circumferential positioning groove 28 and is used to adjust the circumferential position of the filling ring 100.

[0055] Furthermore, in some other embodiments, the adjustment assembly 104 may include only one of the axial adjustment assembly 106 or the circumferential adjustment assembly 120.

[0056] In some embodiments, such as Figure 1 As shown, the axial adjustment assembly 106 includes three axial positioning screws 2 and three axial positioning keys 5. In some embodiments, the axial positioning key 5 is installed in the axial positioning groove, with one end embedded in the pressing section 117 and the other end abutting against the positioning ring 102. The end on the pressing section 117 is slightly lower than the end overlapping the positioning ring 102, giving the axial positioning key 5 a certain inclination angle. An axially penetrating through hole is provided on the end of the axial positioning key 5 overlapping the pressing section 117. The pressing section 117 has axial threaded holes corresponding to the positions of the axial positioning screws 2. The axial positioning screws 2 pass through the through holes and connect with the axial threaded holes. By turning the axial positioning screws 2, the axial position of the axial positioning key 5 is adjusted, thereby adjusting the axial position of the positioning ring 102, and consequently adjusting the axial position of the filling ring 100. It can be understood that the number of axial positioning screws 2 and axial positioning keys 5 can be set according to the number of axial positioning grooves.

[0057] In some embodiments, such as Figure 1 , Figure 3 and Figure 5 As shown, the circumferential adjustment assembly 120 includes three circumferential positioning screws 15 and three circumferential positioning keys 19. The circumferential positioning keys 19 are arc-shaped and are mounted on circumferential positioning grooves 28 on the inner wall of the pressing section 117. The pressing section 117 is provided with radial threaded holes. The circumferential positioning screws 15 pass through the radial threaded holes and are nested onto the circumferential positioning keys 19, and the circumferential positioning screws 15 are rotatable on the circumferential positioning keys 19. Rotating the circumferential positioning screws 15 drives the circumferential positioning keys 19, thereby adjusting the radial position of the filling ring 100.

[0058] Furthermore, in other embodiments, the circumferential positioning keys 19 may be set to four or any number greater than two.

[0059] like Figure 1 As shown, when using the welding positioning inflatable protection device, first install the filling ring 100 at the end of the pressure-resistant shell 101. After installing the filling ring 100, insert the positioning ring 102 into the pressure-resistant shell 101. Manually use the positioning ring 102 to make a preliminary adjustment to the filling ring 100. After the adjustment, install the inflation assembly 103, attach the inflation cover 1 in the inflation assembly 103 to the pressure-resistant shell 101, and press the pressing section 117 onto the positioning ring 102. After pressing, fix the device to the pressure-resistant shell 101 through the quick-release locking structure 105. Then, adjust the axial or circumferential position of the filling ring 100 through the adjusting assembly 104.

[0060] like Figure 1 The diagram shown is an installation structure schematic of a welding positioning gas-filled protection method provided by the present invention, specifically including:

[0061] Step S1: Place the filling ring 100 at one axial end of the pressure-resistant shell 101;

[0062] In this embodiment, the on-site operator needs to install the filling ring 100 on the upper axial end of the pressure shell 101 and make a preliminary adjustment to the position of the filling ring 100 on the pressure shell 101 by manual means.

[0063] Step S2: Insert the positioning and centering section 7 of the welding positioning and inflation protection device into the pressure-resistant shell 101, and press the filling ring 100 against the end of the pressure-resistant shell 101 by the pressing section 4 of the welding positioning and inflation protection device;

[0064] In this embodiment, the centering section of the positioning ring 102 is inserted into the pressure-resistant shell 101. After centering, the clamping section 4 is pressed onto the filling ring 100, pressing the filling ring 100 to the end of the pressure-resistant shell 101. During the pressing of the filling ring 100, if the position of the filling ring 100 deviates significantly, the on-site operator can manually adjust the position of the filling ring 100, and then re-press the filling ring 100 after adjustment.

[0065] Step S3: Install the inflatable outer cover 1 of the inflatable component 103 of the welding positioning inflatable protection device onto the end of the pressure-resistant shell 101 and position the positioning ring 102 at the end of the pressure-resistant shell 101;

[0066] In this step, the sleeve section 116 of the inflatable outer cover 1 is sleeved on the pressure shell 101, the positioning ring 102 is positioned at the end of the pressure shell 101 by the pressing section, and the filling ring 100 is pressed by the positioning ring 102.

[0067] In this embodiment, the specific steps include:

[0068] S31: Adjust the position between the filling ring 100 and the pressure-resistant shell 101 by means of the adjusting component 104 of the welding positioning inflation protection device.

[0069] In this step, the inflatable outer cover 1 is equipped with an axial adjustment component 106 and a circumferential adjustment component 120. On-site personnel can adjust the position of the filling ring 100 using either the axial adjustment component 106 or the circumferential adjustment component 120, depending on the actual installation situation. During circumferential adjustment, the circumferential adjustment component 120 directly abuts against the filling ring 100, allowing direct adjustment of the filling ring 100's position. During axial adjustment, the axial adjustment component 106 abuts against the positioning ring 102, adjusting the axial position of the positioning ring 102 to adjust the axial position of the filling ring 100.

[0070] S4: Protective gas is introduced through the air outlet 6 of the welding positioning gas protection device, and welding is performed through the welding hole 3 of the welding positioning gas protection device to fix the filling ring 100 to the pressure-resistant shell 101.

[0071] In this step, when welding the filler ring 100, the protective gas needs to be introduced into the welding space first. After the welding space has a certain amount of protective gas, the filler ring 100 is welded through the welding hole 3.

[0072] In this embodiment, the specific steps include:

[0073] S41: The protective gas is connected through the first inflation port 25 and the second inflation port 26. The protective gas enters the second inflation part 18, is introduced into the first inflation part 17 through the air guide hole, and then connected to the welding position through the air outlet 6.

[0074] In this step, the process of introducing the shielding gas during welding takes a certain amount of time. After turning on the shielding gas, you need to wait for a certain period of time before welding can begin.

[0075] Furthermore, in another embodiment, a pressure valve may be added to the front end of the tee connector 14, and the injection rate of the protective gas can be adjusted by adjusting the pressure valve.

[0076] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. For those skilled in the art, the above features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A welding positioning gas-filled protective device for positioning a filling ring (100) on a pressure-resistant shell (101), wherein the pressure-resistant shell (101) is a hollow cylinder, and the filling ring (100) is disposed at one axial end of the hollow cylinder; characterized in that, The welding positioning gas-filled protection device includes: A positioning ring (102) is disposed at the end of the pressure-resistant shell (101) for abutting against the axial upper end face of the filling ring (100) and against the inner circumferential surface of the filling ring (100); and An inflation assembly (103) is sleeved on the pressure-resistant shell (101). The inflation assembly (103) is used to abut against the axial upper end face of the positioning ring (102) to press the positioning ring (102) onto the filling ring (100) and abut against the outer peripheral surface of the filling ring (100). The positioning ring (102), the inflation component (103), and the pressure-resistant shell (101) are arranged to form an inflation cavity, and the filling ring (100) is disposed in the inflation cavity. The inflation component (103) is provided with an inflation channel that connects an external air source and the inflation cavity.

2. The welding positioning gas-filled protection device according to claim 1, characterized in that, The positioning ring (102) includes: Position the middle section (7) and insert it into the pressure-resistant shell (101); A connecting segment, extending from the side of the positioning centering segment (7) in a direction away from the pressure-resistant shell (101), the connecting segment being used to abut against the outer peripheral surface of the filling ring; and The clamping section (4) is located on one side of the connecting section away from the positioning centering section (7) and is used to abut against the axial upper end face of the positioning ring (102). The clamping section (4) is provided with welding holes (3) corresponding to the welding positions of the filling ring (100) and the pressure shell (101).

3. The welding positioning gas-filled protection device according to claim 2, characterized in that, The connecting section includes a plurality of spaced connecting posts (20), and a welding hole (3) is formed between two adjacent connecting posts (20), and the welding hole (3) is a gate-shaped hole.

4. The welding positioning gas-filled protection device according to claim 2 or 3, characterized in that, The inflation assembly includes: An inflatable outer cover (1) is detachably installed at the end of the pressure-resistant shell (101) and the positioning ring (102) is positioned at the end of the pressure-resistant shell (101). The inflatable outer cover (1) is provided with an air outlet (6) at a position corresponding to the welding hole (3). An inflation channel is formed inside the inflatable outer cover (1). The air outlet (6) is connected to the inflation chamber and the inflation channel respectively.

5. The welding positioning gas-filled protection device according to claim 4, characterized in that, The inflatable outer cover (1) includes: The sleeve section (116) is sleeved around the end of the pressure-resistant shell (101); An inflation section (115) is disposed near the filling ring (100) and connected to the sleeve section (116). An air outlet (6) is provided on the inner wall of the inflation section (115), and an inflation interface is provided on the outer wall of the inflation section (115). An inflation channel is formed within the inflation section (115) that communicates with the air outlet (6) and the inflation interface, respectively. The pressing section (117) is connected to the end of the inflation section (115) away from the sleeve section (116). The pressing section (117) is used to abut against the axial upper end face of the positioning ring (102) and the outer peripheral surface of the filling ring (100).

6. The welding positioning gas-filled protection device according to claim 5, characterized in that, The end of the sleeve section (116) connected to the pressure shell (101) is provided with a plurality of shrinkage grooves (16) along the circumferential direction, and the shrinkage grooves (16) extend along the axial direction.

7. The welding positioning gas-filled protection device according to claim 5, characterized in that, The inflation channels are a first inflation channel and a second inflation channel, and the inflation section (115) includes: The first inflation part (17) is disposed near the outer periphery of the filling ring (100), and the first inflation part (17) is provided with the air outlet (6), and the first inflation channel is formed inside the first inflation part (17). A second inflation part (18) is disposed around the first inflation part (17), and the second inflation part is provided with the inflation port. A second inflation channel is formed inside the second inflation part (18); and, An air vent connects the first inflation part (17) and the second inflation part (18).

8. The welding positioning gas-filled protection device according to claim 5, characterized in that, The inflation ports are a first inflation port (25) and a second inflation port (26), which are respectively arranged opposite to each other on the outer wall of the inflation section (115). The inflation assembly (103) further includes a first air inlet pipe (11), a second air inlet pipe (12), and a third air inlet pipe (13); the first air inlet pipe (11) is connected to the first inflation port (25); the second air inlet pipe (12) is connected to the second inflation port (26); one end of the third air inlet pipe (13) is connected to an air source, and the other end is connected to the first air inlet pipe (11) and the second air inlet pipe (12) through a three-way connector (14).

9. The welding positioning gas-filled protection device according to claim 5, characterized in that, The welding positioning gas-filled protection device also includes an adjustment component (104) disposed on the gas-filled assembly (103) for adjusting the position between the filling ring (100) and the pressure-resistant shell (101).

10. The welding positioning gas-filled protection device according to claim 9, characterized in that, The adjustment component (104) includes: An axial adjustment assembly, disposed on the pressing section, is used to axially compress the filling ring to adjust the axial position between the filling ring and the pressure-resistant shell; and A circumferential adjustment component, disposed on the pressing section, is used to radially compress the filling ring to adjust the radial position between the filling ring and the pressure-resistant shell.

11. The welding positioning gas-filled protection device according to claim 10, characterized in that, The upper axial end face of the pressing section (117) is provided with an axial positioning groove, which penetrates the pressing section along the axial direction; the inner wall of the pressing section (117) is provided with a circumferential positioning groove (28). The axial adjustment assembly includes: An axial positioning key (5) is disposed within the axial positioning groove; and An axial positioning screw (2) is connected to the axial positioning key and is used to drive the axial positioning key (5) to move along the axial direction in order to adjust the position of the axial positioning key (5) pressing the filling ring (100) in the axial direction. The circumferential adjustment assembly (120) includes: A circumferential positioning key (19) is disposed within the circumferential positioning groove (28); and A circumferential positioning screw (15) is connected to the circumferential positioning key (19) and is used to drive the circumferential positioning key (19) to move radially to adjust the radial position of the filling ring (100).

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