An inflatable sealing device

Abstract

The utility model discloses an airtight device, and its technical scheme main points include seal ring plate, inflation pipe, fixed ring plate no.

Description

Technical Field

[0001] This utility model relates to the field of sealing device technology, and more specifically, to an inflatable sealing device. Background Technology

[0002] With the rapid development of technology and the widespread application of advanced welding equipment, back gas protection is essential during plasma welding to ensure product welding quality. This involves replacing the air inside the welding tank with inert gas to prevent oxidation of the weld pool at high temperatures, which would negatively impact weld quality. Therefore, back gas protection is of paramount importance.

[0003] For example, during the welding process of tank products, it is usually necessary to fill the inner cavity of the tank with protective gas. Currently, when filling the inner cavity of the tank with protective gas, it is usually necessary to cover and seal the tank opening with tape or membrane material. The sealing and filling process and equipment are relatively simple, but the operation is cumbersome, reducing production efficiency, wasting tape material, and the sealing effect of tape is not good, which can easily lead to leakage. This also greatly wastes inert protective gases such as argon and nitrogen inside the tank, increasing production costs. Therefore, a new solution is needed to address this problem. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an inflatable sealing device that has an efficient and reliable sealing effect on the can opening and prevents leakage of protective gas.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an inflatable sealing device, comprising a sealing ring plate, an inflation tube, a first fixed ring plate, and a second fixed ring plate. The first and second fixed ring plates are fixedly installed on both sides of the sealing ring plate, and the first fixed ring plate, the sealing ring plate, and the second fixed ring plate are stacked in three layers to press and fix the sealing ring plate. The outer periphery of the sealing ring plate extends to a portion larger than the second fixed ring plate. This outer edge portion can be inserted into the mouth of a container and seals against the inner wall of the mouth. The first fixed ring plate has a through hole. One end of the inflation tube is a fixed end, which is welded and fixed to the outer periphery of the through hole and communicates with it. The other end of the inflation tube is a connector end.

[0006] By adopting the above scheme, a stable and reliable rigid sealing body is formed through the stacked and compressed structure of fixed ring plate one, sealing ring plate, and fixed ring plate two, ensuring the integrity of the device and the durability of the seal. The outer circumference of the sealing ring plate is larger than the outer edge of fixed ring plate two, allowing the sealing ring plate to be effectively pressed against the inner wall of the tank opening, forming the main sealing surface, improving sealing reliability, and preventing leakage of protective gas. In addition, the gas filling pipe is fixed to the outer circumference of the through hole two of fixed ring plate one by welding, with a firm connection and excellent airtightness, ensuring the stability and reliability of the protective gas delivery channel.

[0007] The present invention is further configured such that the fixing ring plate has a through hole three, the sealing ring plate has a through hole one, and the through holes one, two and three are interconnected.

[0008] By adopting the above scheme, interconnected through holes are opened on the first fixed ring plate, the sealing ring plate, and the second fixed ring plate, effectively integrating the protective gas flow channel with the mechanical clamping structure. This design allows the protective gas introduced into the inflation pipe to smoothly and directly enter the sealed chamber formed by the ring plates and the tank body, optimizing the gas path, reducing flow resistance and potential leakage points, and providing a reliable guarantee for improving weld quality.

[0009] The present invention is further configured such that the sealing ring plate is made of rubber or silicone material.

[0010] By adopting the above solution and selecting highly elastic materials such as rubber or silicone to manufacture the sealing ring plate, performance improvements are achieved. Under compression, the sealing ring plate can undergo elastic deformation, thus tightly conforming to the uneven surface of the inner wall of the tank opening, effectively filling microscopic gaps and forming a reliable airtight seal. Simultaneously, the good wear resistance and chemical resistance of rubber or silicone materials ensure the durability and stability of the sealing ring plate during long-term use.

[0011] The present invention is further configured such that the first fixing ring plate, the sealing ring plate and the second fixing ring plate are connected and fixed by bolts, the bolts passing through the first fixing ring plate, the sealing ring plate and the second fixing ring plate, and the two ends are fixed by the bolt head and the nut respectively.

[0012] By adopting the above scheme, the first fixed ring plate, the sealing ring plate, and the second fixed ring plate are connected into a whole by bolts and nuts, forming a stable and reliable rigid sealing body. This connection method can generate uniform axial clamping force, ensuring a tight fit between the ring plates and between the sealing ring plate and the tank opening. At the same time, the bolt connection has the advantage of convenient assembly and disassembly, facilitating the installation, maintenance, and replacement of the device, improving production efficiency and reducing maintenance costs.

[0013] The present invention is further configured to include a pressure plate, which is annular and has a central hole in the middle; the inflation tube passes through the central hole, and the pressure plate can be adjusted along the length of the inflation tube; a pressing protrusion is formed on the side of the pressure plate near the sealing ring plate, and the pressing protrusion is opposite to the outer edge of the sealing ring plate and can abut against the outer edge of the sealing ring plate.

[0014] By adopting the above solution and adding an annular pressure plate that can move axially along the inflation tube, adjustable control of the clamping force on the sealing ring plate is achieved. The clamping protrusion on the lower side of the pressure plate can be aligned with and clamp the outer edge of the sealing ring plate, ensuring that the clamping force is concentrated and evenly applied to the critical sealing area, thereby improving the reliability of the sealing effect.

[0015] The present invention is further configured such that the outer periphery of the first fixing ring plate and the second fixing ring plate are respectively formed with an outer edge portion two and an outer edge portion three, the outer periphery contour of the second outer edge portion is larger than that of the third outer edge portion, and the outer periphery contours of the second outer edge portion and the third outer edge portion are both smaller than that of the first outer edge portion of the sealing ring plate.

[0016] By adopting the above scheme, it is ensured that the force applied by the pressure plate during the clamping process can be effectively transmitted to the sealing ring plate through the outer edge, driving it to produce radial deformation to achieve a seal. At the same time, this layout provides the necessary space for the elastic deformation of the sealing ring plate, avoiding mechanical interference from other ring plates, and ensuring the smoothness and effectiveness of the sealing action.

[0017] The present invention is further configured such that a pressing protrusion is provided on the pressure plate near the sealing ring plate, the inner wall of the pressing protrusion abuts against the outer edge, and the lower end face of the pressing protrusion directly presses against the outer edge of the sealing ring plate, thereby pressing the outer edge onto the fixing ring plate.

[0018] By adopting the above scheme, the inner wall of the clamping ring and the outer edge abut against each other in three phases, which plays a role in positioning and radial limiting, ensuring the accuracy and stability of the force direction during the clamping process and preventing the pressure plate from tilting. At the same time, the lower end face of the clamping ring directly presses against the outer edge of the sealing ring plate, which can concentrate the clamping force to the key sealing area of ​​the sealing ring plate, drive it to generate effective elastic deformation and fit tightly against the inner wall of the tank, thereby forming a reliable radial seal.

[0019] The present invention is further configured such that the pressure plate is provided with a sealing protrusion ring in the radial direction, and a sealing ring II is fitted on the end face of the sealing protrusion ring near the can opening, and the sealing ring II is in close contact with the end face of the can opening.

[0020] By adopting the above scheme, a sealing ring with a second sealing ring is set on the pressure plate. When the pressure plate is tightened, this structure allows the second sealing ring to elastically deform and make tight contact with the end face of the tank opening, thereby forming a reliable static seal on the end face in the axial direction. This seal, together with the radial seal achieved by the sealing ring plate, constitutes a double sealing system, improving the sealing reliability of the entire device, preventing leakage of protective gas, and ensuring the long-term stability of the atmosphere environment inside the tank.

[0021] The present invention is further configured to include an adjusting sleeve, which is sleeved outside the inflation tube and connected to the inflation tube by a thread to form a transmission connection. The adjusting sleeve can press against and push the pressure plate along the axial direction of the inflation tube.

[0022] By adopting the above solution and adding an adjusting sleeve that is threadedly connected to the inflation pipe, the clamping force of the pressure plate can be adjusted. Users only need to rotate the adjusting sleeve to convert its rotational motion into axial displacement via threaded transmission, thereby smoothly pushing or releasing the pressure plate. This design gives the device excellent self-locking performance, effectively preventing accidental loosening of the pressure plate under vibration or pressure fluctuations, and improving the long-term operational stability of the equipment.

[0023] In summary, this utility model has the following beneficial effects:

[0024] 1. By using the pressing mechanism between the outer periphery of the sealing ring plate and the can opening, an efficient and reliable seal is achieved at the can opening, fundamentally eliminating the leakage of protective gas, saving the consumption of expensive inert gases such as argon and nitrogen, and directly reducing production costs.

[0025] 2. This device is easy to install and disassemble and can be reused. It changes the traditional disposable and inefficient mode of tape sealing, greatly improves the efficiency of back gas protection operations in processes such as plasma welding, and avoids the continuous waste of tape materials, which is in line with the production concept of energy conservation and environmental protection. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of an inflatable sealing device according to Embodiment 1.

[0027] Figure 2 This is a front-view cross-sectional view of an inflatable sealing device in this embodiment 2;

[0028] Figure 3 This is a cross-sectional view of an inflatable sealing device sealing a tank in this embodiment two.

[0029] Figure 4 This is a top-view cross-sectional view of an inflatable sealing device in Embodiment 2.

[0030] Figure 5 for Figure 3 Enlarged view of point A.

[0031] Reference numerals: Sealing ring plate 1; Outer edge 101; Through hole 102; Fixing ring plate 1 21; Fixing ring plate 22; Outer edge 201; Outer edge 3 202; Through hole 203; Through hole 3 204; Bolt 31; Nut 32; Air inlet pipe 4; Fixing end 41; Connector end 42; Pressure plate 5; Sealing convex ring 51; Pressing convex ring 52; Center hole 53; Adjusting sleeve 6; Sealing ring 2 7; Can opening 8. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Example 1

[0034] This embodiment discloses an inflatable sealing device, referring to... Figure 1 As shown, this device is mainly used to provide a reliable gas protective seal for the inside of the tank, and is particularly suitable for processes requiring back atmosphere protection, such as plasma welding. Its core components include a sealing ring plate 1, an inflation pipe 4, a first fixing ring plate 21, and a second fixing ring plate 22.

[0035] The sealing ring plate 1, as a key component for achieving the sealing function, is made of rubber or silicone material with excellent elasticity and sealing performance. It can generate sufficient elastic deformation under pressure to conform to the sealing surface. During assembly, the sealing ring plate 1 is clamped between the first fixed ring plate 21 and the second fixed ring plate 22. The first fixed ring plate 21, the sealing ring plate 1, and the second fixed ring plate 22 are connected and fixed by bolts 31. Specifically, the bolts 31 pass through the corresponding through holes on the first fixed ring plate 21, the sealing ring plate 1, and the second fixed ring plate 22 in sequence, and are locked at both ends by the screw head of the bolt 31 and the nut 32, respectively. This compresses the three-layer structure of the first fixed ring plate 21, the sealing ring plate 1, and the second fixed ring plate 22 into a whole, forming a stable annular sealing unit. This not only ensures the uniform stress on the sealing ring plate but also improves the structural stability and durability of the entire device.

[0036] To further establish an efficient inflation channel, a second through hole 203 is provided on the first fixed ring plate 21; a third through hole 204 is provided on the second fixed ring plate 22; and a first through hole 102 is provided on the sealing ring plate 1. After assembly, the first through hole 102, the second through hole 203, and the third through hole 204 are interconnected, forming a smooth gas channel. One end of the inflation pipe 4 is a fixed end 41, which is fixedly connected to the outer periphery of the second through hole 203 by welding and remains connected to the second through hole 203, forming a complete inflation channel. The other end of the inflation pipe 4 is a connector end 42, which adopts a standard interface design and can be connected to external inflation equipment to achieve stable injection of protective gas.

[0037] In terms of the sealing structure design, the outer periphery of the sealing ring plate 1 extends to an outer edge portion 101 that is larger than that of the fixed ring plate 22. During the actual sealing process, the outer edge portion 101 can be inserted into the can opening portion 8 of the container, playing a preliminary positioning role. When the device is under pressure, the larger sealing ring plate 1 undergoes radial elastic deformation under axial pressure, and the outer edge portion 101 tightly adheres to and seals the inner wall of the can opening portion 8, forming a reliable radial sealing barrier, thereby effectively isolating the atmosphere inside the can from the external environment and ensuring the gas protection effect of the back molten pool during welding.

[0038] Example 2

[0039] This embodiment discloses an inflatable sealing device, which is based on Embodiment 1 and further refers to... Figures 2-5 A detailed explanation will be provided.

[0040] The inflatable sealing device in this embodiment also includes a pressure plate 5 and an adjusting sleeve 6. The pressure plate 5 adopts a ring structure design with a central hole 53. The inflation tube 4 passes through the central hole 53, allowing the pressure plate to move freely along the axial direction of the inflation tube 4. The adjusting sleeve 6 is sleeved on the outside of the inflation tube 4. The internal thread of the adjusting sleeve 6 and the external thread of the inflation tube 4 are mutually engaged, forming a transmission connection. By rotating the adjusting sleeve 6, the adjusting sleeve 6 can move along the axial direction of the inflation tube 4, thereby pressing and pushing the pressure plate 5 along the axial direction of the inflation tube 4. The pressing plate 5 can move downward along the length of the inflation tube 4, realizing the adjustment of the clamping force. This adjusting mechanism is easy to operate and has a self-locking function, which can effectively maintain the set clamping state.

[0041] A ring-shaped sealing protrusion 51 is provided on the pressure plate 5 in the radial direction. A sealing ring 7 is fitted on the side of the sealing protrusion 51 facing the end face of the can opening 8. When the pressure plate 5 is pressed down, the sealing ring 7 is in close contact with the end face of the can opening 8, forming an axial seal on the end face, which constitutes a sealing barrier to prevent gas from leaking from the contact surface.

[0042] Reference Figure 5As shown, the outer peripheries of the first fixed ring plate 21 and the second fixed ring plate 22 respectively extend to form an outer edge portion 201 and an outer edge portion 302. The outer periphery of the second outer edge portion 201 is larger than that of the third outer edge portion 202, and the outer periphery of both the second outer edge portion 201 and the third outer edge portion 202 is smaller than that of the outer edge portion 101 of the sealing ring plate 1, forming a stepped outer edge structure. This design not only provides the necessary space for the deformation of the sealing ring plate 1, but also optimizes the transmission path of the clamping force, ensuring that the sealing force is effectively applied to the critical sealing area.

[0043] A pressing protrusion 52 is integrally formed on the side of the pressure plate 5 near the sealing ring plate 1. The position of the pressing protrusion 52 corresponds to the outer edge 101 of the sealing ring plate 1 and can abut against the outer edge 101 of the sealing ring plate 1. In the actual pressing process, the pressing plate 5 is provided with the pressing protrusion 52 near the sealing ring plate 1. The inner wall of the pressing protrusion 52 abuts against the outer edge 202 of the fixing ring plate 22, which plays a radial positioning role. At the same time, the lower end face of the pressing protrusion 52 directly presses against the outer edge 101 of the sealing ring plate 1, pressing the outer edge 101 against the fixing ring plate 21, thereby causing the outer edge 101 of the sealing ring plate 1 to undergo radial elastic deformation, tightly fitting the inner wall of the can opening 8, forming a radial seal.

[0044] At the outer periphery of the pressure plate 5, the pressing convex ring 52 and the outer edge 101 of the sealing ring plate 1 press against each other to form a pressing and sealing structure; a pressing and sealing structure is formed between the sealing convex ring 51 and the end face of the can opening 8, thereby forming another seal between the outer periphery of the pressure plate 5 and the can opening 8, realizing double sealing protection and improving sealing reliability. At the same time, the adjustable pressing mechanism allows the device to adapt to different working conditions, enhancing the practicality and applicability of the product.

[0045] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An inflatable sealing device, characterized in that, The container includes a sealing ring plate (1), an air inlet pipe (4), a first fixing ring plate (21), and a second fixing ring plate (22). The first fixing ring plate (21) and the second fixing ring plate (22) are fixedly installed on both sides of the sealing ring plate (1). The first fixing ring plate (21), the sealing ring plate (1), and the second fixing ring plate (22) are stacked in three layers to press and fix the sealing ring plate (1). The outer periphery of the sealing ring plate (1) extends to an outer edge portion (101) that is larger than the second fixing ring plate (22). The outer edge portion (101) can be inserted into the can opening portion (8) of the container and seals against the inner wall of the can opening portion (8). The fixed ring plate (21) has a through hole (203); one end of the air tube (4) is a fixed end (41), which is welded to the outer periphery of the through hole (203) and connected to the through hole (203); the other end of the air tube (4) is a connector end (42).

2. The inflatable sealing device according to claim 1, characterized in that, The fixed ring plate 2 (22) has a through hole 3 (204), and the sealing ring plate (1) has a through hole 1 (102). The through holes 1 (102), 2 (203) and 3 (204) are interconnected.

3. The inflatable sealing device according to claim 1, characterized in that, The sealing ring plate (1) is made of rubber or silicone.

4. The inflatable sealing device according to claim 1, characterized in that, The first fixing ring plate (21), the sealing ring plate (1) and the second fixing ring plate (22) are connected and fixed by bolts (31). The bolts (31) pass through the first fixing ring plate (21), the sealing ring plate (1) and the second fixing ring plate (22), and are fixed at both ends by the bolt head and the nut (32) respectively.

5. The inflatable sealing device according to claim 1, characterized in that, It also includes a pressure plate (5), which is annular and has a central hole (53) in the middle; the inflation tube (4) is provided through the central hole (53), and the pressure plate (5) can be adjusted along the length of the inflation tube (4); a pressing protrusion (52) is formed on the side of the pressure plate (5) near the sealing ring plate (1), and the pressing protrusion (52) is opposite to the outer edge (101) of the sealing ring plate (1) and can abut against the outer edge (101) of the sealing ring plate (1).

6. The inflatable sealing device according to claim 5, characterized in that, The outer periphery of the first fixed ring plate (21) and the second fixed ring plate (22) are respectively formed with an outer edge portion two (201) and an outer edge portion three (202). The outer periphery contour of the second outer edge portion (201) is larger than that of the third outer edge portion (202), and the outer periphery contours of the second outer edge portion (201) and the third outer edge portion (202) are both smaller than that of the outer edge portion one (101) of the sealing ring plate (1).

7. The inflatable sealing device according to claim 6, characterized in that, The pressure plate (5) is provided with a pressing protrusion (52) near the sealing ring plate (1). The inner wall of the pressing protrusion (52) abuts against the outer edge portion three (202). The lower end face of the pressing protrusion (52) directly presses against the outer edge portion one (101) of the sealing ring plate (1), pressing the outer edge portion one (101) against the fixing ring plate one (21).

8. The inflatable sealing device according to claim 7, characterized in that, The pressure plate (5) is provided with a sealing protrusion (51) in the radial direction. A sealing ring (7) is fitted on the end face of the sealing protrusion (51) near the can opening (8). The sealing ring (7) is in close contact with the end face of the can opening (8).

9. The inflatable sealing device according to claim 5, characterized in that, It also includes an adjusting sleeve (6), which is sleeved on the outside of the inflation tube (4) and is connected to the inflation tube (4) by a thread. The adjusting sleeve (6) can press against the pressure plate (5) in the axial direction of the inflation tube (4).

Images