Sealing ring airtightness detection device
By designing a sealing ring airtightness detection device including convex columns, through holes, pressure rings and limit rings, the problem that the prior art cannot detect the inner and outer airtightness performance of the sealing ring separately is solved, and a systematic evaluation and design optimization of the airtightness performance of the sealing ring is achieved.
Patent Information
- Application Number
- CN202421835670.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-31
AI Technical Summary
The existing airtightness detection devices cannot independently detect the airtightness performance on the inside and outside of the sealing ring, resulting in low design and detection efficiency.
A sealing ring airtightness detection device is designed, including a first box body, a second box body and a box cover. Through structures such as convex columns, through holes, pressure rings and limit rings, the airtightness performance of the inside and outside of the sealing ring can be detected respectively.
实现了对密封圈内、外侧气密性能的独立检测，系统性评估气密性能差异，为密封圈结构设计、选材和装配预紧力设计提供参考，提高设计性能指标。
Smart Images
Figure CN222913028U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of airtightness detection tools, and particularly relates to an airtightness detection device for a sealing ring. Background Art
[0002] Sealing rings are widely used in various industrial fields to prevent fluid or gas leakage and ensure the normal operation of equipment. In design, manufacturing, and mass production, the detection of leakage points of sealing rings can provide effective references for the structural optimization, material selection, and assembly pre-tightening force of sealing rings. Existing airtightness detection devices simply detect the overall airtightness performance of the sealing ring, rather than separately detecting the airtightness performance of the inner and outer sides of the sealing ring, which brings some problems. Since the diameters and designed geometric shapes of the inner and outer sides of the sealing ring may be different, there are certain differences in the contact area and pressure distribution between the inner and outer sides of the sealing ring and adjacent parts. Moreover, during assembly, due to dimensional differences between the inner and outer sides of the sealing ring, the elongation amounts are different, which will also cause differences in airtightness performance between the inner and outer sides. In practice, the airtightness performance can be improved by optimizing the structure of the sealing ring and improving the sealing ring material. However, due to the inability to separately detect the actual airtightness performance of the inner and outer sides of the sealing ring, the design and detection efficiency are relatively low. Summary of the Utility Model
[0003] I. Technical Problems to be Solved
[0004] The purpose of the utility model is to provide an airtightness detection device for a sealing ring, which can independently detect the airtightness performance of the inner and outer sides of the sealing ring and provide references for the structural design, material selection, easily leaky points on the inner and outer sides, and assembly pre-tightening force design of the sealing ring.
[0005] II. Technical Solutions
[0006] The utility model is realized through the following technical solutions:
[0007] The utility model provides an airtightness detection device for a sealing ring, which includes a first box body, a second box body detachably connected below the first box body, and a box cover that can be rotatably covered above the first box body. A convex column protrudes upward from the middle of the bottom surface of the second box body. A through hole is opened in the middle of the first box body. The convex column passes through the through hole from below into the first box body, and a gap for gas to pass through is left between the convex column and the through hole. A pressing ring is fixed to the inner top wall of the box cover. An inner joint and an outer joint are arranged outside the box cover. The communication parts of the inner joint and the outer joint with the box cover are located inside and outside the pressing ring respectively. The sealing ring is sleeved outside the convex column and is pressed by the pressing ring to block the gap between the convex column and the through hole.
[0008] Furthermore, a limiting ring is fixed inside the second box body. The inner and outer sides of the sealing ring are respectively limited by the convex column and the limiting ring. The heights of the limiting ring and the top of the convex column are lower than the height of the top of the sealing ring when it is limited and fixed.
[0009] Furthermore, an annular groove with an arc-shaped cross-section is formed on the end face of the pressing ring, and the top of the sealing ring is embedded in the annular groove.
[0010] Furthermore, the second box body is threadedly connected below the first box body, and a pressure gauge is communicated with the side surface of the second box body.
[0011] Furthermore, a fitting groove is formed at the upper edge of the first box body, and a fitting ring is fixed at the lower edge of the box cover. When the box cover is closed on the first box body, the fitting ring is fitted in the fitting groove.
[0012] Furthermore, a lower handle and an upper handle are respectively and fixedly connected to the side surfaces of the first box body and the box cover, and the lower handle and the upper handle have contact planes that are opposite and can closely fit with each other.
[0013] III. Beneficial Effects
[0014] The utility model has the following beneficial effects compared with the prior art:
[0015] After the box cover of the utility model is closed, the pressing ring presses the sealing ring tightly to seal the gap between the convex column and the through hole. The sealing ring and the pressing ring divide the space between the first box body and the box cover into two parts inside and outside with the sealing ring as the boundary, and the two parts are respectively communicated with the inner joint and the outer joint; during detection, external high-pressure gas is respectively introduced into the inner joint and the outer joint. When the inner joint is communicated, the airtightness inside the sealing ring is detected alone. When the outer joint is communicated, the airtightness outside the sealing ring is detected alone. When the gas leaks through the sealing ring and passes through the gap between the convex column and the through hole, the pressure gauge detects the increase in the air pressure in the second box body and gives feedback, so as to systematically evaluate the difference in airtight performance inside and outside the sealing ring, provide reference for the structural design, material selection, easy leakage points inside and outside, and assembly pre-tightening force design of the sealing ring, and provide ideas and feedback for improving the design performance index of the sealing ring. Description of the Drawings
[0016] Figure 1 is a three-dimensional structural schematic diagram of the utility model;
[0017] Figure 2 is a front view of a partial cross-section of the utility model;
[0018] Figure 3 is Figure 2 a partial enlarged view of part A in
[0019] 1. First box body; 101. Through hole; 102. Fitting groove; 2. Second box body; 201. Convex post; 202. Limiting ring; 3. Box cover; 301. Pressing ring; 3011. Annular groove; 302. Fitting ring; 4. Inner joint; 5. Outer joint; 6. Pressure gauge; 7. Upper handle; 8. Lower handle; 9. Sealing ring. Detailed implementation mode
[0020] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0021] A sealing ring airtightness detection device, please refer to Figures 1-3 , including a first box body 1, a second box body 2 coaxially connected below the first box body 1, and a box cover 3. Among them, the second box body 2 is connected to the lower part of the first box body 1 by threaded connection or snap connection, and the box cover 3 is rotatably connected to the first box body 1 by a pin shaft and can be rotatably covered above the first box body 1;
[0022] A convex post 201 is formed by protruding upward in the middle of the bottom surface of the second box body 2. A through hole 101 is opened in the middle of the bottom surface of the first box body 1. The convex post 201 passes through the through hole 101 from below into the first box body 1. The diameter of the convex post 201 is smaller than the diameter of the through hole 101, and a gap for gas to pass through is left between the convex post 201 and the through hole 101; A pressing ring 301 is fixed on the inner top wall of the box cover 3; The sealing ring 9 is sleeved outside the convex post 201. When the box cover 3 is closed, the pressing ring 301 will press the sealing ring 9 to block the gap between the convex post 201 and the through hole 101; An inner joint 4 and an outer joint 5 are arranged outside the box cover 3, and the communication parts of the inner joint 4 and the outer joint 5 with the box cover 3 are located inside and outside the pressing ring 301 respectively.
[0023] The side of the second box body 2 is connected with a pressure gauge 6, and the pressure gauge 6 is used to detect the air pressure change in the second box body 2.
[0024] The inner joint 4 and the outer joint 5 are both connected to the external high-pressure pipeline. The sealing ring 9 is sleeved outside the convex column 201. The lid 3 is closed, and the pressing ring 301 presses the sealing ring 9 tightly to block the gap between the convex column 201 and the through hole 101. At this time, the sealing ring 9 and the pressing ring 301 divide the space between the first box body 1 and the lid 3 into two parts inside and outside with the sealing ring 9 as the boundary, and the two parts are respectively communicated with the inner joint 4 and the outer joint 5. During detection, the valves located on the external high-pressure pipeline are opened respectively to introduce external high-pressure gas into the inner joint 4 and the outer joint 5. When the inner joint 4 is communicated, the airtightness inside the sealing ring 9 is detected separately. When the outer joint 5 is communicated, the airtightness outside the sealing ring 9 is detected separately. When the gas leaks through the sealing ring 9 and passes through the gap between the convex column 201 and the through hole 101, the pressure gauge 6 detects the increase in air pressure in the second box body 2 and gives feedback, so as to systematically evaluate the difference in airtightness performance between the inside and outside of the sealing ring 9, provide reference for the structural design, material selection, easy leakage points inside and outside, and assembly pre-tightening force design of the sealing ring 9, and provide ideas and feedback for improving the design performance index of the sealing ring 9.
[0025] In the present utility model, a limiting ring 202 is fixed inside the second box body 2. The inner and outer sides of the sealing ring 9 are respectively limited by the convex column 201 and the limiting ring 202. The heights of the uppermost ends of the limiting ring 202 and the convex column 201 are lower than the height of the uppermost end of the sealing ring 9 when it is limited and fixed, that is, the sealing ring 9 protrudes above the limiting ring 202. An annular groove 3011 with an arc-shaped cross-section is formed on the end face of the pressing ring 301. The top of the sealing ring 9 is embedded in the annular groove 3011. The bottom of the sealing ring 9 is fixed by the limiting ring 202 and the convex column 201, and the upper part is fitted in the annular groove 3011. When the lid 3 is closed, the sealing ring 9 can be tightly pressed and fixed, and is not easy to shift, ensuring the accuracy of detection.
[0026] In addition, a lower handle 8 and an upper handle 7 are respectively fixedly connected to the sides of the first box body 1 and the lid 3. The lower handle 8 and the upper handle 7 have contact planes that are opposite and can be closely attached to each other. By holding the upper handle 7 and the lower handle 8, the lid 3 can be quickly tightened. An engaging groove 102 is formed at the upper edge of the first box body 1, and an engaging ring 302 is fixed at the lower edge of the lid 3. The engaging ring 302 can be a rubber ring that is in interference fit with the engaging groove 102. When the lid 3 is closed on the first box body 1, the engaging ring 302 is embedded in the engaging groove 102, and the engaging ring 302 cooperates with the engaging groove 102 to ensure the airtightness when the lid 3 is tightened, making the airtightness detection more accurate.
[0027] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope of the present invention. The technical content claimed by the present invention has been fully recorded in the claims.
Claims
1. A sealing ring air tightness detection device, characterized in that: The utility model comprises a first box body, a second box body detachably connected to the bottom of the first box body, and a box cover which can be rotatably covered on the top of the first box body, wherein a convex column is protruded upward in the middle of the bottom surface of the second box body, a through hole is opened in the middle of the first box body, the convex column passes through the through hole from the bottom to the inside of the first box body, and a gap for gas to pass through is reserved between the convex column and the through hole; a pressure ring is fixed to the inner top wall of the box cover, an inner joint and an outer joint are arranged on the outside of the box cover, and the connection points between the inner joint and the outer joint and the box cover are respectively located on the inner side and the outer side of the pressure ring; a sealing ring is sleeved on the outside of the convex column and is pressed by the pressure ring to seal the gap between the convex column and the through hole.
2. A sealing ring air tightness detection device according to claim 1, characterized in that: A limiting ring is fixed in the second box body, and the inner and outer sides of the sealing ring are limited by the convex column and the limiting ring respectively. The height of the upper ends of the limiting ring and the convex column is lower than the height of the upper end of the sealing ring when it is limited and fixed.
3. A sealing ring air tightness detection device according to claim 2, characterized in that: The end surface of the pressure ring is provided with an annular groove with an arc-shaped cross section, and the top of the sealing ring is embedded in the annular groove.
4. A sealing ring air tightness detection device according to any one of claims 1 to 3, characterized in that: The second box body is threadedly connected to the bottom of the first box body, and a pressure gauge is connected to the side of the second box body.
5. A sealing ring air tightness detection device according to claim 4, characterized in that: An embedding groove is provided at the upper edge of the first box body, and an embedding ring is fixed at the lower edge of the box cover. When the box cover is covered on the first box body, the embedding ring is embedded in the embedding groove.
6. A sealing ring air tightness detection device according to claim 5, characterized in that: The first box body and the box cover are respectively fixedly connected with a lower handle and an upper handle on their sides, and the lower handle and the upper handle have contact planes that are opposite and can fit closely to each other.