A gas expansion sealing joint
By designing a inflationary sealing joint and using the airbag to squeeze seal under the action of high-pressure air, the problem of poor sealing effect of existing sealing joints in high-pressure environments is solved, the sealing performance and service life are improved, and maintenance costs are reduced.
Patent Information
- Application Number
- CN202421497029.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-27
AI Technical Summary
Existing sealing joints are easily scratched by sharp edges or burrs during the sealing process, resulting in frequent replacement and increasing maintenance costs. At the same time, the sealing effect is poor in high-pressure gas environments.
A inflation-type sealing joint is designed, including a workpiece joint, a sealing joint and a filling joint. An airbag is provided in the sealing joint. The airbag is squeezed and sealed by filling high-pressure air to achieve sealing in a high-pressure environment.
It improves the sealing performance and service life of the sealing joint, reduces maintenance costs, and maintains a good sealing effect under high pressure environments.
Smart Images
Figure CN222732357U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a leak detection and sealing technology, in particular to an air expansion type sealing joint. Background Art
[0002] For products or equipment that require sealing, leak detection must be performed before they are put into use, and leak detection must also be performed regularly during use. The sealing joint of the leak detection equipment needs to be sealed with the workpiece. During the sealing process, the sealing ring between the sealing joint and the workpiece to be inspected is scratched by the sharp edges and burrs of the joint of the workpiece to be inspected, and needs to be replaced frequently, which increases maintenance costs. In addition, since a certain pressure of gas is filled into the workpiece cavity, the sealing effect is not good during the leak detection process. Utility Model Content
[0003] In order to solve the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide an inflatable sealing joint, which has good sealing performance and is easy to connect, thus meeting the needs of the airtightness detection industry.
[0004] The utility model solves the technical problem by adopting the following technical solution: an inflatable sealing joint, comprising a workpiece joint, a sealing joint and a filling joint, wherein the sealing joint is arranged between the workpiece joint and the filling joint, a workpiece channel is arranged in the middle of the workpiece joint, a sealing channel is arranged in the middle of the sealing joint, a helium filling channel is arranged in the middle of the filling joint, and the workpiece channel, the sealing channel and the helium filling channel are coaxially arranged;
[0005] The inner wall of the sealing channel is provided with a recess, and an airbag is installed in the sealing channel, the top of the airbag is pressed between the sealing joint and the filling joint, and the bottom of the airbag is squeezed between the sealing joint and the workpiece joint, so that an inflation chamber is enclosed between the wall of the airbag and the recess of the sealing channel;
[0006] The sealing joint is provided with an inflation channel, one end of which is communicated with the inflation chamber, and the other end of which is connected with high-pressure air through a control valve.
[0007] Optionally, the workpiece joint, the sealing joint and the filling joint are fastened by bolts.
[0008] Optionally, a first positioning groove adapted to one end of the sealing joint is provided on a side of the filling joint close to the sealing joint, and a second positioning groove adapted to the other end of the sealing joint is provided on a side of the workpiece joint close to the sealing joint.
[0009] Optionally, the filling joint is provided with an air channel, the axis of the air channel is parallel to the axis of the filling joint, one end of the air channel is connected to high-pressure air through a control valve, and the other end is connected to the inflation channel;
[0010] A sealing ring is installed at the butt joint between the air channel and the inflation channel.
[0011] Optionally, the sealing joint is further provided with a pressure relief hole, and the pressure relief hole is communicated with the inflation channel;
[0012] A detachable sealing plug is arranged in the pressure relief hole.
[0013] By adopting the above technical solution, when the joint is not filled with air, the airbag is not compressed. At this time, the airbag is in a fluffy state, and the workpiece docking and installation is easier. When the workpiece is fixed, air with a certain pressure is filled to squeeze the airbag, and the airbag squeezes the workpiece to seal. At this time, by controlling the pressure of the filled air, the sealing under high-pressure conditions inside the workpiece can be met, thereby realizing the high-pressure leak detection process of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of the utility model;
[0015] Figure 2 yes Figure 1 A magnified view of part A;
[0016] Figure 3 It is a cross-sectional view of the utility model;
[0017] Figure 4 It is a structural schematic diagram of a workpiece joint of the utility model;
[0018] Figure 5 It is a structural schematic diagram of the sealing joint of the utility model;
[0019] Figure 6 It is a structural schematic diagram of the filling joint of the utility model;
[0020] Figure 7 It is a schematic diagram of the structure of the airbag of the utility model. DETAILED DESCRIPTION
[0021] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.
[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0023] like Figures 1 to 3As shown, the utility model discloses an inflatable sealing joint, including a workpiece joint 100, a sealing joint 200 and a filling joint 300, wherein the sealing joint 200 is clamped and detachably fixed between the workpiece joint 100 and the filling joint 300. In the utility model, the workpiece joint 100 is used to clamp the workpiece, so a workpiece channel 110 distributed along the axis needs to be set in the middle of the workpiece joint 100, the sealing joint 200 is used for radial sealing of the workpiece, so a sealing channel 210 needs to be set in the sealing joint 200, and a sealing unit is installed in the sealing channel 210 to seal the outer wall of the workpiece in the radial direction, and the filling joint 300 is used to fill helium into the workpiece, so a helium filling channel 310 distributed along the axis is set in the middle of the filling joint 300. The workpiece channel 110, the sealing channel 210 and the helium filling channel 310 are all through-type channels, and the three are distributed along the same axis to facilitate positioning of the workpiece. When connected, the workpiece joint 100, the sealing joint 200, and the filling joint 300 are fastened by bolts. Therefore, screw holes for connection and fastening are respectively provided in the workpiece joint 100, the sealing joint 200, and the filling joint 300. The axes of these screw holes are arranged parallel to the axis to facilitate the insertion of the bolts.
[0024] In the present invention, the sealing unit adopts an airbag 400, such as Figure 7 As shown, the airbag 400 has a first folded portion 410 located at the upper part, a second folded portion 420 located at the lower part, and a sealing portion 430 located in the middle part. The first folded portion 410 is pressed by the top surface of the filling joint 300 and the sealing joint 200, the second folded portion 420 is pressed by the bottom surface of the workpiece joint 100 and the sealing joint 200, and the sealing portion 430 is naturally extended at the inner wall position of the sealing channel 210. In addition to the concave portion, the inner wall of the sealing channel 210 is also provided with a concave portion. When the airbag 400 is attached to the inner wall of the sealing channel 210, the wall portion of the sealing portion 430 of the airbag 400 and the concave portion of the sealing channel 210 form an inflation chamber 220. The inflation chamber 220 is used to fill high-pressure air. When the inflation chamber 220 is filled with high-pressure air, the high-pressure air can squeeze the sealing portion 430 of the airbag 400, so that the sealing portion 430 is closely attached to the surface of the workpiece, thereby sealing the surface of the workpiece.
[0025] In the present utility model, if Figure 5As shown, the sealing joint 200 is provided with an air filling channel 230, and the air filling channel 230 is used to fill the air filling chamber 220 with high pressure air, so one end of the air filling channel 230 is connected with the air filling chamber 220, and the other end is connected with the high pressure air through a control valve. After the test is completed, the high pressure air in the air filling chamber 220 needs to be depressurized to relax the sealing portion 430 of the airbag 400, so as to facilitate the removal of the workpiece. Therefore, a pressure relief hole 240 needs to be provided on the sealing joint 200, and the pressure relief hole 240 should be connected with the sealing joint 200, and a detachable sealing plug needs to be provided in the pressure relief hole 240. The sealing plug is closed during the test to close the pressure relief hole 240, and the sealing plug is opened before the workpiece is removed after the test is completed. In one embodiment of the utility model, in order to facilitate the setting of the pressure relief hole 240, an air channel 320 can be set in the charging joint 300, one end of the air channel 320 is connected to the inflation channel 230, and the other end is connected to high-pressure air through a control valve. At this time, the air channel 320 is parallel to the axis of the sealing joint, so the pressure relief hole 240 can be set on the side of the sealing joint 200. In order to ensure that the air channel 320 does not leak during inflation, a sealing ring is installed at the position where the air channel 320 and the inflation channel 230 are connected.
[0026] In the present utility model, if Figure 4 , Figure 6 As shown, in order to facilitate the positioning of the sealing joint 200, a first positioning groove 330 adapted to one end of the sealing joint 200 is provided on the side of the filling joint 300 close to the sealing joint 200, and a second positioning groove 120 adapted to the other end of the sealing joint 200 is provided on the side of the workpiece joint 100 close to the sealing joint 200. When assembling the sealing joint 200, the sealing joint 200 is directly positioned in the first positioning groove 330 and the second positioning groove 120, and then the three are connected and fastened by bolts.
[0027] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.
[0028] Except for the technical features described in the specification, the other technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present utility model, the other technical features will not be described in detail here.
Claims
1. An inflatable sealing joint, characterized in that: It comprises a workpiece joint, a sealing joint and a filling joint, wherein the sealing joint is arranged between the workpiece joint and the filling joint, a workpiece channel is arranged in the middle of the workpiece joint, a sealing channel is arranged in the middle of the sealing joint, a helium filling channel is arranged in the middle of the filling joint, and the workpiece channel, the sealing channel and the helium filling channel are coaxially arranged; The inner wall of the sealing channel is provided with a recess, and an airbag is installed in the sealing channel, the top of the airbag is pressed between the sealing joint and the filling joint, and the bottom of the airbag is squeezed between the sealing joint and the workpiece joint, so that an inflation chamber is enclosed between the wall of the airbag and the recess of the sealing channel; The sealing joint is provided with an inflation channel, one end of which is communicated with the inflation chamber, and the other end of which is connected with high-pressure air through a control valve.
2. The inflatable sealing joint according to claim 1, characterized in that: The workpiece joint, the sealing joint and the filling joint are fastened by bolts.
3. The inflatable sealing joint according to claim 1, characterized in that: A first positioning groove matched with one end of the sealing joint is provided on one side of the filling joint close to the sealing joint, and a second positioning groove matched with the other end of the sealing joint is provided on one side of the workpiece joint close to the sealing joint.
4. The inflatable sealing joint according to claim 3, characterized in that: The filling joint is provided with an air channel, the axis of the air channel is parallel to the axis of the filling joint, one end of the air channel is connected to high-pressure air through a control valve, and the other end is connected to the inflation channel; A sealing ring is installed at the butt joint between the air channel and the inflation channel.
5. The inflatable sealing joint according to claim 4, characterized in that: The sealing joint is also provided with a pressure relief hole, which is communicated with the inflation channel; A detachable sealing plug is arranged in the pressure relief hole.