Combined inflatable sealing structure

Abstract

A combined type inflation sealing structure comprises an air bag ring and an installation fixing groove, the air bag ring is arranged in the installation fixing groove in a sleeved mode, the upper end and the lower end of the outer side of the air bag ring are fixedly connected with air bag limiting skirt edges, and the air bag limiting skirt edges are connected to the inner wall of the installation fixing groove in a clamped mode. The upper end of the mounting fixing groove is detachably connected with a top pressing plate, and the lower end of the mounting fixing groove is detachably connected with a bottom pressing plate. By means of effective combination of the opening type inflatable sealing ring and the mounting groove, a closed cavity is formed between the opening type inflatable sealing ring and the mounting groove, so that the air bag ring is good in expansion sealing effect, stable, durable and low in replacement cost, the air bag ring is expanded through inflation to make close contact with and be clamped with a sealing target face, and therefore the efficient sealing effect is achieved. The sealing effect is further enhanced through the arrangement of the sealing strips, and it is guaranteed that the stable sealing performance can be kept under the complex working condition.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber seals, in particular to a combined inflatable seal structure. Background Art

[0002] The traditional inflatable sealing ring is a structure similar to an inner tube of a vehicle with a hollow shape and a nozzle. The inflatable sealing ring is usually installed and fixed in a limiting groove, so as to guide the sealing ring to expand towards a specified surface and extrude with a target workpiece to generate a sealing effect or act as a fixture. The nozzle of the inflatable sealing ring can be connected to a gas source. When the inflation valve is opened, the sealing ring expands and seals. When the inflation valve is switched to the emptying state, the inflatable sealing ring relieves pressure and automatically returns to the state before inflation. Since such products have high requirements for deformation and sealing effect, the materials currently selected for inflatable sealing rings are mainly elastic rubber and plastic materials such as, but not limited to, silicone rubber, ethylene propylene diene monomer rubber, nitrile rubber, fluorine-containing rubber, etc.

[0003] At present, the main use form of the inflatable sealing ring is to embed a hollow ring body with a nozzle processed by processes such as bonding, vulcanization welding, and integral molding into a groove made of metal, plastic, etc. with high strength and not easy to deform for inflation and deflation. Due to the existence of the nozzle, corresponding nozzle holes must be processed on the installation groove, which makes the installation and replacement of the inflatable sealing ring difficult. The installation groove also needs to be designed as a detachable baffle for easy installation of the sealing ring. On the other hand, in the process of using the hollow inflatable sealing ring processed by the above inflatable sealing ring, there are more or less problems such as weld cracking and bulging caused by uneven wall thickness. These problems are difficult to avoid in the processing of cavity rubber products. In addition, the production of cavity inflatable sealing rings also has problems such as complex processes and low production efficiency, which are difficult to meet the increasingly high market needs. At present, the inflatable sealing ring has poor stability, unsatisfactory sealing effect, and is not convenient for quick installation and disassembly of the airbag ring, resulting in difficult maintenance and high replacement cost. Summary of the Utility Model

[0004] In order to solve the above technical problems, a combined inflatable seal structure is provided. This technical solution solves the problems of poor stability, unsatisfactory sealing effect, inconvenient quick installation and disassembly of the airbag ring, difficult maintenance, and high replacement cost of the above inflatable sealing ring.

[0005] To achieve the above object, the technical solution adopted by the utility model is as follows:

[0006] A combined inflatable seal structure, including an airbag ring and an installation and fixing groove. The airbag ring is sleeved inside the installation and fixing groove. Both the upper and lower ends of the outer side of the airbag ring are fixedly connected with airbag limiting skirts, and the airbag limiting skirts are clamped on the inner wall of the installation and fixing groove. The upper end of the installation and fixing groove is detachably connected with a top pressing plate, and the lower end of the installation and fixing groove is detachably connected with a bottom pressing plate.

[0007] Preferably, sealing strips are fixedly connected to the upper and lower ends of the airbag ring respectively, and the sealing strips are abutted against the top pressing plate and the bottom pressing plate respectively.

[0008] Preferably, the cross-sectional shape of the airbag ring is U-shaped.

[0009] Preferably, an air charging and discharging joint is installed outside the installation fixing groove, and the air charging and discharging joint is communicated with the airbag ring.

[0010] Preferably, a plurality of groups of screw holes are penetrated through the outer sides of the top pressing plate and the bottom pressing plate, and a plurality of groups of threaded holes are formed on the outer side wall of the installation fixing groove, and one group of screw holes corresponds to one threaded hole.

[0011] Preferably, a metal limiting groove adapted to the airbag limiting skirt is formed on the outer side wall of the installation fixing groove, and the airbag limiting skirt is clamped inside the metal limiting groove.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: by using the effective combination of the open-type inflatable sealing ring and the installation groove, a sealed cavity is formed between the two, so that the airbag ring has good expansion and sealing effects, is stable and durable, and has a low replacement cost. And by inflating the airbag ring to expand, it is in close contact with and clamped to the sealing target surface, thereby achieving an efficient sealing effect. The setting of the sealing strip further enhances the sealing effect and ensures stable sealing performance under complex working conditions. This structure can be widely applied to small-diameter inflatable seals and high-expansion fixture seals, such as the seal of the metal rod of an electron beam device, the coating of a catalyst carrier, an automatic milking device, a micro fixture and other fields;

[0013] The present utility model is applicable to a variety of sealing and clamping scenarios, such as pipeline plugging, inflatable fixtures, etc. And by adjusting the expansion direction and shape of the airbag ring (such as outer expansion type, concave expansion surface type, etc.), the sealing requirements under different working conditions can be met, and it has high application value.

[0014] By providing the top pressing plate and the bottom pressing plate, the airbag ring can be conveniently clamped in the installation fixing groove through the airbag limiting skirt and fixed by the top pressing plate and the bottom pressing plate, making the replacement and maintenance of the airbag ring simple and fast, effectively reducing the replacement cost and improving the work efficiency. At the same time, the shapes of the airbag ring and the installation fixing groove can be customized according to actual needs, increasing the flexibility of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic side-sectional structure view of the present utility model;

[0016] Figure 2 is a schematic top view structure of the present utility model;

[0017] Figure 3 Schematic side sectional view of Variant 1 - outer expansion type of the present utility model;

[0018] Figure 4 Schematic top view of Variant 1 - outer expansion type of the present utility model;

[0019] Figure 5 Schematic side sectional view of Variant 2 - inner concave expansion surface type of the present utility model;

[0020] Figure 6 Schematic top view of Variant 2 - inner concave expansion surface type of the present utility model.

[0021] The reference numerals in the figure are:

[0022] 1. Airbag ring; 2. Installation and fixing groove; 3. Top pressing plate; 4. Bottom pressing plate; 5. Inflation and deflation joint; 6. Airbag limiting skirt; 7. Sealing strip; 8. Metal limiting groove; 9. Screw hole; 10. Threaded hole. Detailed implementation manners

[0023] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0024] Embodiment 1

[0025] Please refer to Figures 1-6 As shown, a combined inflatable sealing structure includes an airbag ring 1 and an installation and fixing groove 2. The airbag ring 1 is sleeved inside the installation and fixing groove 2. Both the upper and lower ends of the outer side of the airbag ring 1 are fixedly connected with airbag limiting skirts 6. The airbag limiting skirts 6 are clamped on the inner wall of the installation and fixing groove 2. The upper end of the installation and fixing groove 2 is detachably connected with a top pressing plate 3, and the lower end of the installation and fixing groove 2 is detachably connected with a bottom pressing plate 4.

[0026] In this solution, the airbag ring 1 can be clamped inside the installation and fixing groove 2 through the airbag limiting skirts 6. The airbag ring 1 can be stably fixed at both the upper and lower ends of the installation and fixing groove 2 by the top pressing plate 3 and the bottom pressing plate 4. And by removing the top pressing plate 3 and the bottom pressing plate 4 from the installation and fixing groove 2, the airbag ring 1 can be replaced or maintained, reducing the replacement cost, facilitating quick replacement and disassembly. And by effectively combining the open-type inflatable sealing ring and the installation groove, a sealed cavity is formed between them, so that the expansion and sealing effect of the airbag ring 1 is better, stable and durable;

[0027] Furthermore, both the airbag ring 1 and the installation and fixing groove 2 are annular structures. The inner diameter D of the airbag ring 1 is 20 mm to 500 mm, the height H is 15 mm to 100 mm, and the single-side width W is 10 mm to 50 mm. The airbag ring 1 is a flexible structure, mainly made of rubber. The inflation pressure range of the cavity formed between it and the installation and fixing groove 2 is 0.05 MPa to 0.8 MPa. The wall thickness of the airbag ring 1 is 0.5 mm to 5 mm. When the wall thickness is small, the airbag ring has better conformity after expansion;

[0028] Furthermore, the shapes of the airbag ring 1 and the installation and fixing groove 2 can be specifically designed according to the shape of the object to be sealed or clamped;

[0029] Furthermore, based on the above, the present utility model also has the following variations:

[0030] Variation 1 (outer expansion type)

[0031] Please refer to Figure 3 and Figure 4 shown. The main structure is similar to Figure 1 . The expansion direction of the airbag ring 1 is the outer diameter side. After inflation, the airbag ring 1 expands and contacts and clamps the sealing target surface to seal. The installation and fixing groove 2 is located on the inner diameter side of the airbag ring 1. The inflation and deflation joint 5 is designed on the upper and lower surfaces or the inner diameter side according to specific usage requirements. This type is applicable to pipeline plugging and inflatable fixtures, etc.;

[0032] Variation 2 (concave expansion surface type)

[0033] Please refer to Figure 4 and Figure 6 shown. The main structure is very close to Figure 1 . The only difference lies in the shape of the airbag ring 1. In this variation, the expansion surface of the airbag ring 1 is changed from a plane to a concave surface, so that the airbag surface has a larger surface area. After inflation, the airbag ring 1 has a larger deformation amount. This shape is also applicable to the outer expansion type described in Variation 1. This shape can be used in scenarios with higher requirements for the inflation expansion variation amount.

[0034] Embodiment 2

[0035] Please refer to Figure 1 shown. Sealing strips 7 are respectively fixedly connected to the upper and lower ends of the airbag ring 1, and the sealing strips 7 respectively abut against the top pressing plate 3 and the bottom pressing plate 4.

[0036] The cross-sectional shape of the airbag ring 1 is U-shaped.

[0037] In this solution, the sealing strip 7 is in contact with the top pressure plate 3 and the bottom pressure plate 4 to increase the sealing effect between the airbag ring 1 and the mounting and fixing groove 2, the top pressure plate 3, and the bottom pressure plate 4, thereby increasing the sealing effect of the airbag ring 1.

[0038] Example 3

[0039] Please refer to Figure 1 As shown, an inflation / deflation joint 5 is installed on the outer side of the mounting and fixing groove 2 , and the inflation / deflation joint 5 is connected to the airbag ring 1 .

[0040] In this solution, the inflation and deflation joint 5 can be connected to a standard airbag adapter and connected to an air source. After inflation, the airbag ring 1 will expand to reach the inflation upper limit or the wall of the workpiece; after deflation, the airbag ring 1 returns to the position before inflation.

[0041] Furthermore, the thread standard of the charging and discharging interface can be M4, M5, M6, M8, M10, G1 / 8, etc.;

[0042] Furthermore, when high-rate inflation and deflation are required, an inflation and deflation interface can be added, or a dedicated inflation and deflation interface can be provided.

[0043] Example 4

[0044] Please refer to Figures 1-2 As shown, a plurality of screw holes 9 are formed through the outer sides of the top pressing plate 3 and the bottom pressing plate 4 , and a plurality of threaded holes 10 are formed on the outer side wall of the mounting and fixing groove 2 , and one threaded hole 10 corresponds to one threaded hole 9 .

[0045] A metal limiting groove 8 matched with the airbag limiting skirt 6 is formed on the outer side wall of the installation fixing groove 2 , and the airbag limiting skirt 6 is clamped in the inside of the metal limiting groove 8 .

[0046] In this solution, bolts are passed through the screw holes 9 and threadedly connected to the inside of the threaded holes 10, so that the top pressure plate 3 and the bottom pressure plate 4 are tightened by the bolts to compress and deform the sealing strip 7 of the airbag ring 1, thereby forming an efficient and stable closed cavity between the airbag ring 1 and the mounting fixing groove 2.

[0047] Working principle and usage process of the present utility model: First, install the airbag ring 1 inside the installation and fixing groove 2. At the same time, snap the airbag limiting skirt 6 into the metal limiting groove 8 to fix the position of the airbag ring 1. Then, install the top pressing plate 3 and the bottom pressing plate 4 at the upper and lower ends of the installation and fixing groove 2 respectively, and align the screw holes 9 with the threaded holes 10. After that, pass bolts through the screw holes 9 and thread them into the threaded holes 10 to fixedly install the airbag ring 1 inside the installation and fixing groove 2. During use, connect an external air source to the air charging and discharging joint 5. After inflation, the airbag ring 1 will expand to reach the expansion upper limit or the wall surface of the workpiece, thereby closely fitting the workpiece surface and improving the sealing effect.

[0048] The above shows and describes the basic principle, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection required by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A combined inflatable sealing structure, comprising an airbag ring (1) and a mounting fixing groove (2), characterized in that: The airbag ring (1) is sleeved inside the mounting and fixing groove (2), and the upper and lower ends of the outer side of the airbag ring (1) are fixedly connected to airbag limiting skirts (6), and the airbag limiting skirts (6) are clamped on the inner wall of the mounting and fixing groove (2). The upper end of the mounting and fixing groove (2) is detachably connected to a top pressure plate (3), and the lower end of the mounting and fixing groove (2) is detachably connected to a bottom pressure plate (4).

2. A combined inflatable sealing structure according to claim 1, characterized in that: The upper and lower ends of the airbag ring (1) are respectively fixedly connected with sealing strips (7), and the sealing strips (7) are respectively in contact with the top pressure plate (3) and the bottom pressure plate (4).

3. A combined inflatable sealing structure according to claim 1, characterized in that: The cross-sectional shape of the airbag ring (1) is U-shaped.

4. A combined inflatable sealing structure according to claim 1, characterized in that: An inflation and deflation joint (5) is installed on the outer side of the mounting and fixing groove (2), and the inflation and deflation joint (5) is connected to the airbag ring (1).

5. The combined inflatable sealing structure according to claim 1, characterized in that: A plurality of groups of screw holes (9) are provided through the outer sides of the top pressing plate (3) and the bottom pressing plate (4), and a plurality of groups of threaded holes (10) are provided on the outer side wall of the mounting and fixing groove (2), wherein one group of screw holes (9) corresponds to one threaded hole (10).

6. The combined inflatable sealing structure according to claim 1, characterized in that: The outer side wall of the installation fixing groove (2) is provided with a metal limiting groove (8) adapted to the airbag limiting skirt (6), and the airbag limiting skirt (6) is snap-fitted into the interior of the metal limiting groove (8).

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