Partial sealing device

Abstract

The utility model discloses a kind of local sealing devices, it is related to machining equipment technical field, wherein, local sealing device includes internal sealing assembly and external sealing assembly;Internal sealing assembly includes inner support ring and two internal sealing parts, inner support ring is located in the inner cavity of tubular workpiece, two internal sealing parts are respectively located in the opposite two ends of inner support ring, and two internal sealing parts are used for sealing abutment with tubular workpiece;External sealing assembly includes outer support ring and two external sealing parts, outer support ring is sleeved in tubular workpiece, two external sealing parts are respectively located in the opposite two ends of outer support ring, and with outer support ring sealing sealing rotation connection, two external sealing parts are used for sealing abutment with tubular workpiece;The technical scheme provided by the utility model can realize the sealing of high efficiency, low cost.

Description

Technical Field

[0001] This utility model relates to the field of machining equipment technology, and in particular to a local sealing device. Background Technology

[0002] In existing technologies, welding of some large cylindrical workpieces requires a vacuum environment. This necessitates the construction of a massive vacuum chamber capable of housing the entire workpiece. This not only significantly increases the construction cost of the vacuum chamber but also greatly complicates the engineering implementation due to its complex structure and sealing challenges. Utility Model Content

[0003] The main objective of this invention is to propose a local sealing device that aims to achieve a high-efficiency and low-cost sealing solution.

[0004] To achieve the above objectives, the present invention proposes a partial sealing device for sealing the circumferential seam of a cylindrical workpiece, the partial sealing device comprising: An internal sealing assembly includes an inner support ring and two internal sealing parts. The inner support ring is disposed in the inner cavity of the cylindrical workpiece, and the two internal sealing parts are respectively disposed at opposite ends of the inner support ring. The two internal sealing parts are used to seal against the cylindrical workpiece. An external sealing assembly includes an outer support ring and two external sealing parts. The outer support ring is sleeved on the cylindrical workpiece, and the two external sealing parts are located at opposite ends of the outer support ring and are rotatably connected to the outer support ring. The two external sealing parts are used to seal against the cylindrical workpiece.

[0005] In one embodiment, a first annular receiving groove is formed at each of the opposite ends of the inner support ring; The internal sealing part is a first inflatable sealing ring, and each first inflatable sealing ring is disposed in a first annular receiving groove. The first inflatable sealing ring is used to seal against the cylindrical workpiece.

[0006] In one embodiment, the internal sealing assembly further includes a plurality of adjusting blocks and a plurality of locking elements. The plurality of adjusting blocks are respectively disposed on opposite sides of the inner support ring, and each locking element is threaded through an adjusting block. The locking element is used to abut and limit the movement of the cylindrical workpiece.

[0007] In one embodiment, the external sealing part includes a sealing sleeve and a second inflatable sealing ring. The sealing sleeve is rotatably connected to the outer support ring. The sealing sleeve forms a second annular receiving groove. The second inflatable sealing ring is disposed in the second annular receiving groove and is used to seal against the cylindrical workpiece.

[0008] In one embodiment, a rotational clearance is formed between the external sealing portion and the external support ring; The external sealing assembly also includes two lip seals and a gasket disposed in the rotation gap. Both lip seals and the gasket are fitted onto the external sealing part, and the gasket is located between the two lip seals.

[0009] In one embodiment, the external sealing assembly further includes two bearings, which are respectively sleeved on opposite ends of the outer support ring, and each external sealing part is sleeved on one of the bearings.

[0010] In one embodiment, the outer support ring has a protrusion, and the protrusion has a through hole; The partial sealing device also includes a glass flange, which is inserted into the through hole.

[0011] In one embodiment, the glass flange is flexibly disposed within the through hole; The partial sealing device further includes an adjusting rod that passes sequentially through the periphery of the glass flange and the protrusion. Two nuts are screwed onto the adjusting rod, and the two nuts are located between the periphery of the glass flange and the protrusion.

[0012] In one embodiment, the outer support ring is provided with at least two protrusions, and each of the protrusions is spaced apart along the circumference of the outer support ring; The partial sealing device includes at least two glass flanges, each of which is sealed and inserted into a protrusion.

[0013] In one embodiment, the outer support ring is provided with a vacuum port.

[0014] In the technical solution of this utility model, a local vacuum seal can be formed around the circumferential seam of the cylindrical workpiece through the cooperation of the internal sealing component and the external sealing component, resulting in high sealing efficiency and low cost. Furthermore, the external sealing part and the external support ring are rotatably connected, allowing the cylindrical workpiece to rotate relative to the fixed external sealing component during welding, ensuring the uniformity of welding quality. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1A schematic diagram of an embodiment of the partial sealing device provided by this utility model; Figure 2 A cross-sectional view of an embodiment of the partial sealing device provided by this utility model; Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0017] Explanation of icon numbers: 1000. Partial sealing device; 1. Internal sealing assembly; 11. Inner support ring; 12. Internal sealing part; 12a. First inflatable sealing ring; 13. Adjusting block; 14. Locking element; 2. External sealing assembly; 21. Outer support ring; 211. Protrusion; 212. Vacuum interface; 22. End flange; 23. Sealing flange; 24. Second inflatable sealing ring; 25. Lip seal; 26. Gasket; 27. Bearing; 3. Glass flange; 4. Adjusting rod; 5. Cylindrical workpiece.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] 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 scope of protection of the present utility model.

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] This utility model proposes a partial sealing device 1000 for sealing the circumferential seam of a cylindrical workpiece 5.

[0023] Please see Figure 1 , Figure 2 and Figure 3 In one embodiment of this utility model, the partial sealing device 1000 includes an internal sealing assembly 1 and an external sealing assembly 2. The internal sealing assembly 1 includes an inner support ring 11 and two internal sealing parts 12. The inner support ring 11 is disposed in the inner cavity of the cylindrical workpiece 5, and the two internal sealing parts 12 are respectively disposed at opposite ends of the inner support ring 11. The two internal sealing parts 12 are used to seal against the cylindrical workpiece 5. The external sealing assembly 2 includes an outer support ring 21 and two external sealing parts. The outer support ring 21 is sleeved on the cylindrical workpiece 5, and the two external sealing parts are respectively located at opposite ends of the outer support ring 21 and are rotatably connected to the outer support ring 21. The two external sealing parts are used to seal against the cylindrical workpiece 5.

[0024] In the technical solution of this utility model, by cooperating with the internal sealing component 1 and the external sealing component 2, a local vacuum seal can be formed around the circumferential seam of the cylindrical workpiece 5, resulting in high sealing efficiency and low cost. Furthermore, the external sealing part and the outer support ring 21 are rotatably connected, allowing the cylindrical workpiece 5 to rotate relative to the fixed external sealing component 2 during the welding process, ensuring the uniformity of the welding quality.

[0025] Specifically, in one embodiment of this utility model, please refer to... Figure 2 and Figure 3The inner support ring 11 has a first annular receiving groove formed at each of its opposite ends; the internal sealing part 12 is a first inflatable sealing ring 12a, each of which is located in a first annular receiving groove and is used to seal against the cylindrical workpiece 5. The inner support ring 11 has first annular receiving grooves machined at its opposite axial ends. The first annular receiving groove is a continuous groove opened along the circumference of the inner support ring 11; each first inflatable sealing ring 12a is correspondingly installed in a first annular receiving groove. The first annular receiving groove provides a precise installation position for the first inflatable sealing ring 12a, ensuring that the sealing ring does not shift axially or circumferentially during inflation and workpiece rotation, thus guaranteeing the accuracy and stability of the sealing position. The first inflatable sealing ring 12a is an annular seal that can be inflated by an external gas source (such as compressed air or inert gas) to expand in volume. After inflation, it can actively adapt to minor shape errors such as unevenness and ellipticity of the inner wall of the cylindrical workpiece 5, filling gaps and achieving a very reliable seal. Furthermore, by adjusting the inflation pressure, the contact pressure between the sealing ring and the inner wall of the workpiece can be precisely controlled. This ensures sufficient sealing force to prevent leakage during vacuuming, while reducing friction in non-working states, facilitating the installation, adjustment, and removal of the device.

[0026] Furthermore, in one embodiment of this utility model, please refer to... Figure 3 The internal sealing assembly 1 also includes multiple adjusting blocks 13 and multiple locking elements 14. The adjusting blocks 13 are respectively located on opposite sides of the inner support ring 11, and each locking element 14 passes through an adjusting block 13. The locking element 14 is used to abut and limit the cylindrical workpiece 5. These adjusting blocks 13 can be rigidly connected to the end face of the inner support ring 11 by means of welding or bolting; each locking element 14 is threaded through a corresponding adjusting block 13. The locking element 14 abuts and limits the cylindrical workpiece 5, which can provide radial position limitation and support. During operation, the internal sealing assembly 1 rotates together with the cylindrical workpiece 5 through the friction between the internal sealing part 12 and the inner wall of the cylindrical workpiece 5. The locking element 14, which is pre-aligned and provides slight support, helps to suppress possible vibration or drift of the internal sealing assembly 1.

[0027] Specifically, in one embodiment of this utility model, please refer to... Figure 3The external sealing part includes a sealing sleeve and a second inflatable sealing ring 24. The sealing sleeve is rotatably connected to the outer support ring 21. The sealing sleeve has a second annular receiving groove, and the second inflatable sealing ring 24 is disposed in the second annular receiving groove. The second inflatable sealing ring 24 is used to seal against the cylindrical workpiece 5. The sealing sleeve includes an end flange 22 and a sealing flange 23 connected together. The end flange 22 is rotatably connected to the outer support ring 21, and the sealing flange 23 has a second annular receiving groove. The end flange 22 is rotatably connected to the fixed outer support ring 21 via a bearing 27. The sealing flange 23 is fixedly connected to the end flange 22 (e.g., by bolts or integrally formed) and extends axially toward the cylindrical workpiece 5. A second annular receiving groove is machined on the inner circumferential surface of the sealing flange 23. The second inflatable sealing ring 24 is installed in the second annular receiving groove and is used to expand after inflation to seal against the outer wall surface of the cylindrical workpiece 5. The end flange 22 and the sealing flange 23 can be made of different materials and have different structural optimizations. The end flange 22 can focus more on ensuring the rigidity, strength and dimensional accuracy of the connection with the bearing 27; while the sealing flange 23 can be designed to be thinner and lighter to reduce weight and focus on providing the best mounting base for the sealing ring.

[0028] To enable rotation between the external sealing part and the outer support ring 21, in one embodiment of this utility model, please refer to... Figure 3 A rotational gap is formed between the external sealing part and the outer support ring 21. The external sealing assembly 2 also includes two lip seals 25 and a washer 26 disposed in the rotational gap. Both lip seals 25 and the washer 26 are fitted onto the external sealing part, with the washer 26 located between the two lip seals 25. The external sealing assembly 2 also includes two bearings 27, which are respectively fitted onto opposite ends of the outer support ring 21. Each external sealing part is fitted onto one bearing 27. The introduction of the bearings 27 makes the rotation of the external sealing part very smooth, greatly reducing the rotational torque; and the bearings 27 can provide precise radial positioning, preventing eccentric friction between the sealing components. Since rotation inevitably creates a rotational gap, two lip seals 25 and a washer 26 are provided within the rotational gap. The flexible lips of the lip seals 25 can tightly adhere to the rotating surface under pressure, effectively preventing the medium from passing through. Using two lip seals 25 can construct a double sealing barrier, greatly improving sealing reliability. The gasket 26 is located between the two lip seals 25, which can ensure that the two lip seals 25 maintain a preset axial distance, making it easy to install and position. At the same time, together with the two lip seals 25, they form a closed space, which can be filled with lubricating oil to continuously lubricate the sealing lips, reduce wear, and extend the life of the seal.

[0029] Specifically, in one embodiment of this utility model, please refer to... Figure 1 and Figure 3 The outer support ring 21 has a protrusion 211, which forms a through hole. The local sealing device 1000 also includes a glass flange 3, which is sealed and inserted into the through hole. The axis of the through hole points to the sealing cavity formed inside the local sealing device 1000, i.e., the circumferential weld area. The glass flange 3 is a metal flange seat with high-temperature resistant and high-strength optical glass inlaid in the center. The glass flange 3 is sealed and inserted into the through hole of the protrusion 211 through the cooperation of the sealing groove and the sealing ring. In the case of laser welding, the laser beam can penetrate the optical glass of the glass flange 3 without obstruction and directly act on the circumferential weld of the workpiece in the sealing cavity to achieve welding. When using other welding methods, the glass flange 3 can also be removed, and the welding torch tip can be inserted into the sealing cavity through the through hole for operation. The welding torch tip is also sealed and connected to the through hole.

[0030] Furthermore, in one embodiment of this utility model, please refer to... Figure 1 The glass flange 3 is raised and lowered through the through hole. The partial sealing device 1000 also includes an adjusting rod 4, which passes sequentially through the periphery of the glass flange 3 and the protrusion 211. Two nuts are screwed onto the adjusting rod 4, located between the periphery of the glass flange 3 and the protrusion 211. There are three or more adjusting rods 4, evenly distributed around the circumference of the glass flange 3. Each adjusting rod 4 has two nuts. By rotating the nuts, the glass flange 3 can be pushed or released, thereby raising or lowering the glass flange 3.

[0031] Specifically, in one embodiment of this utility model, the outer support ring 21 is provided with at least two protrusions 211, each protrusion 211 being spaced apart circumferentially along the outer support ring 21; the partial sealing device 1000 includes at least two glass flanges 3, each glass flange 3 being sealed and inserted into a protrusion 211. These different glass flanges 3 can serve different functions; for example, one can be used as the main welding joint for welding, while the other can be used to install monitoring equipment such as cameras or thermometers to monitor welding quality.

[0032] Furthermore, in one embodiment of this utility model, please refer to... Figure 1 The outer support ring 21 is equipped with a vacuum port 212. The vacuum port is connected to the sealed chamber formed by the local sealing device 1000. The vacuum port 212 can be connected to an external vacuum pump group through a hose or metal bellows for vacuuming. The vacuum port 212 is located on the fixed outer support ring 21 for easy pipeline connection.

[0033] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A partial sealing device for sealing the circumferential seam of a cylindrical workpiece, characterized in that, The local sealing device includes: An internal sealing assembly includes an inner support ring and two internal sealing parts. The inner support ring is disposed in the inner cavity of the cylindrical workpiece, and the two internal sealing parts are respectively disposed at opposite ends of the inner support ring. The two internal sealing parts are used to seal against the cylindrical workpiece. An external sealing assembly includes an outer support ring and two external sealing parts. The outer support ring is sleeved on the cylindrical workpiece, and the two external sealing parts are located at opposite ends of the outer support ring and are rotatably connected to the outer support ring. The two external sealing parts are used to seal against the cylindrical workpiece.

2. The partial sealing device as described in claim 1, characterized in that, The inner support ring has a first annular receiving groove formed at each of its opposite ends; The internal sealing part is a first inflatable sealing ring, and each first inflatable sealing ring is disposed in a first annular receiving groove. The first inflatable sealing ring is used to seal against the cylindrical workpiece.

3. The partial sealing device as described in claim 1, characterized in that, The internal sealing assembly also includes multiple adjusting blocks and multiple locking elements. The multiple adjusting blocks are respectively located on opposite sides of the inner support ring, and each locking element is threaded through an adjusting block. The locking element is used to abut and limit the movement of the cylindrical workpiece.

4. The partial sealing device as described in any one of claims 1 to 3, characterized in that, The external sealing part includes a sealing sleeve and a second inflatable sealing ring. The sealing sleeve is rotatably connected to the outer support ring. The sealing sleeve forms a second annular receiving groove. The second inflatable sealing ring is disposed in the second annular receiving groove and is used to seal against the cylindrical workpiece.

5. The partial sealing device as described in any one of claims 1 to 3, characterized in that, A rotational clearance is formed between the external sealing part and the external support ring; The external sealing assembly also includes two lip seals and a gasket disposed in the rotation gap. Both lip seals and the gasket are fitted onto the external sealing part, and the gasket is located between the two lip seals.

6. The partial sealing device as described in any one of claims 1 to 3, characterized in that, The external sealing assembly also includes two bearings, which are respectively sleeved on opposite ends of the outer support ring, and each external sealing part is sleeved on one of the bearings.

7. The partial sealing device as described in any one of claims 1 to 3, characterized in that, The outer support ring is provided with a protrusion, and the protrusion has a through hole; The partial sealing device also includes a glass flange, which is inserted into the through hole.

8. The partial sealing device as described in claim 7, characterized in that, The glass flange is lifted and positioned within the through hole; The partial sealing device further includes an adjusting rod that passes sequentially through the periphery of the glass flange and the protrusion. Two nuts are screwed onto the adjusting rod, and the two nuts are located between the periphery of the glass flange and the protrusion.

9. The partial sealing device as described in claim 7, characterized in that, The outer support ring is provided with at least two protrusions, and each of the protrusions is spaced apart along the circumference of the outer support ring; The partial sealing device includes at least two glass flanges, each of which is sealed and inserted into a protrusion.

10. The partial sealing device according to any one of claims 1 to 3, characterized in that, The outer support ring is equipped with a vacuum port.

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