A new inflatable sealing ring

Abstract

The utility model discloses a novel inflatable sealing ring belongs to sealing ring technical field, this novel inflatable sealing ring, including pipeline compensator, the middle section of pipeline compensator is provided with bellows, the both ends of bellows all are provided with a plurality of located on the connecting block of pipeline compensator, the inside welding of pipeline compensator has the fairlead, the inner wall between fairlead and pipeline compensator is provided with sealing ring subassembly, the connecting block is inserted with bolt, both ends of bolt all are connected with nut through screw thread. The utility model discloses through sealing ring subassembly integration double independent pipeline, inflatable pipe realizes sealing inflation, pressurized inflatable pipe directly injects detection gas to bellows cavity, does not need to additionally install pipeline, gas outlet goes in bellows cavity, and sealing valve can maintain constant pressure, can quickly establish detection environment, shorten operation time, can also accurate feedback bellows sealed state, makes detection process more efficient, and the result is more accurate.

Description

Technical Field

[0001] This utility model belongs to the field of sealing ring technology, specifically relating to a novel inflatable sealing ring. Background Technology

[0002] Pipeline compensators are key components in industrial gas and water transmission pipeline systems. They are mainly used to absorb displacement and stress caused by temperature changes, medium flow, or installation deviations in pipelines. Their core structure includes a corrugated pipe in the middle section, flange rings for secure connection, and internal guide plates. The corrugated pipe, as the core functional component of the compensator, achieves displacement compensation through its elastic deformation capability, while the guide plates guide the smooth flow of the medium, reduce impact wear on the corrugated pipe, and ensure the long-term stable operation of the pipeline system. They are widely used in various industrial pipeline scenarios such as petroleum, chemical, and municipal industries.

[0003] During long-term use, existing pipeline compensators are prone to air and liquid leaks in the corrugated area due to factors such as media corrosion and stress fatigue. Traditional detection methods require filling the entire corrugated area with water and observing water level changes or leakage to locate the leak. This method has drawbacks. For large-sized pipeline compensators, the detection area is large, and filling it with water consumes a lot of water resources. Moreover, the drainage and drying process after detection is cumbersome, wasting manpower and time. At the same time, water may remain inside the pipeline, aggravating corrosion of the pipeline inner wall and compensator components, affecting the subsequent service life of the equipment. In addition, water filling detection cannot accurately locate tiny leaks, which can easily lead to inaccurate detection results. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a new type of inflatable sealing ring.

[0005] The technical solution adopted to solve the above technical problems is: a new type of inflatable sealing ring, including a pipe compensator, wherein a corrugated pipe is provided in the middle section of the pipe compensator, and several connecting blocks located on the pipe compensator are provided at both ends of the corrugated pipe. A guide plate for guiding gas and liquid is welded inside the pipe compensator. A sealing ring assembly is provided between the flow guide plate and the inner wall of the pipe compensator. The sealing ring assembly is used to seal the bellows during inspection. The connecting block is fitted with bolts that restrict the stretching of the bellows. Both ends of the bolts are threaded with nuts, which are located on one side of the connecting block.

[0006] Furthermore, the sealing ring assembly includes a hollow sealing ring disposed between the guide plate and the inner wall of the pipe compensator. An expansion inflation pipe and a pressurization inflation pipe are respectively disposed on the hollow sealing ring. One end of the expansion inflation pipe is connected to the hollow section of the hollow sealing ring, and the other end of the expansion inflation pipe is provided with an inflation port one. The pressurization inflation pipe passes through the hollow sealing ring and is not connected to the hollow part of the hollow sealing ring. An inflation port two and an air outlet are respectively provided at both ends of the pressurization inflation pipe.

[0007] Through the above technical solution, the sealing ring assembly integrates expansion and pressurization dual-function pipelines. The expansion inflation pipe can inflate the hollow sealing ring to make it expand and seal, while the pressurization inflation pipe can directly deliver gas to the corrugated cavity for testing. There is no need to disassemble or add testing pipelines. The independent design of the two pipelines does not interfere with each other, which not only ensures the reliability of the seal, but also simplifies the corrugated pipe sealing test process and improves the testing efficiency.

[0008] Furthermore, a corrugated cavity is formed between the guide plate and the corrugated pipe, and the air outlet is located inside the corrugated cavity.

[0009] With the above technical solution, the air outlet extends directly into the corrugated cavity, allowing pressurized gas to be accurately injected into the area to be tested. This ensures that the test gas fills the entire corrugated cavity, avoiding gas leakage or blind spots in the test. This inflation design can quickly establish the test pressure, shorten the pressure stabilization time, and more accurately reflect the sealing status of the corrugated pipe, thus improving the accuracy of the test results.

[0010] Furthermore, both ends of the pipe compensator are provided with flange rings for connecting and fixing to the pipe.

[0011] Through the above technical solutions, the flange ring provides a stable and convenient connection between the pipeline compensator and the external pipeline, ensuring reliable sealing at the connection point and preventing leakage during the operation of the overall pipeline system. The standardized flange connection facilitates the installation, disassembly and maintenance of the pipeline compensator, while enhancing the connection strength between the pipeline compensator and the pipeline, and ensuring the structural stability of the overall pipeline system.

[0012] Furthermore, an elastic washer is provided between the nut and the connecting block, the elastic washer being used to buffer the tightening stress of the bolt.

[0013] Through the above technical solutions, the elastic gasket can buffer the stress generated when the bolts are tightened, avoid damage to the connecting block or nut due to stress concentration, and compensate for the loosening of the bolts during long-term use, keeping the limiting force of the bolts on the bellows stable. This buffering design extends the service life of the bolts, nuts and connecting blocks, ensures the structural stability of the pipeline compensator during operation, and avoids damage to the bellows due to excessive stretching.

[0014] Furthermore, the hollow sealing ring is integrally vulcanized from aging-resistant rubber material, and after being inflated, the hollow sealing ring is interference-fitted with the guide plate and the bellows.

[0015] Through the above technical solutions, the aging-resistant rubber material extends the service life of the sealing ring, adapts to the complex working environment of the pipeline, and the one-piece vulcanization molding ensures the integrity of the sealing ring structure without splicing gaps, reducing the risk of leakage. The interference fit after inflation makes the sealing ring fit tightly against the guide plate and the inner wall of the bellows, forming an all-round seal. Even if there are small gaps, they can be filled by the flexible deformation of the rubber, improving the reliability of the seal.

[0016] Furthermore, both the expansion and inflation tubes are high-pressure resistant hoses, and functional markings are printed on the outer walls of both the expansion and inflation tubes.

[0017] Through the above technical solutions, the high-pressure resistant hose can withstand the impact of high-pressure gas during the testing process, avoiding pipeline rupture that could lead to testing failure or safety hazards. The functional markings on the outer wall can quickly distinguish the uses of the two pipelines, preventing confusion of the inflation interface during operation, reducing the probability of misoperation, and improving the convenience and safety of testing operations.

[0018] Furthermore, both the first and second inflation ports are equipped with sealing valves, which are either one-way valves or shut-off valves, and are used to maintain the pressure inside the pipeline after inflation.

[0019] Through the above technical solutions, the sealing valve can automatically lock the pressure in the pipeline after inflation, maintaining the sealing state and detection pressure without continuous inflation, saving gas consumption. The design of the check valve or shut-off valve can effectively prevent gas backflow, ensuring the stability of the seal and the constant detection pressure, providing a stable pressure environment for bellows sealing performance testing, and ensuring accurate test results.

[0020] The beneficial effects of this utility model are as follows: (1) By setting a sealing ring assembly, the hollow sealing ring is made of aging resistant rubber in one piece by vulcanization. After inflation, it forms an interference fit with the guide plate and the corrugated pipe. It can fill the small gap through elastic deformation, effectively block the leakage of detection gas, and maintain a stable sealing effect; (2) By integrating two independent pipelines through the sealing ring assembly, the expansion inflation pipe achieves sealing expansion, and the pressurized inflation pipe directly injects detection gas into the corrugated cavity. No additional pipeline is required. The outlet is deep into the corrugated cavity, and the sealing valve can maintain a constant pressure. It can quickly establish the detection environment, shorten the operation time, and accurately reflect the sealing status of the corrugated pipe, making the detection process more efficient and the results more accurate. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural view of the present invention; Figure 2 This is the front view of this utility model; Figure 3 yes Figure 1 Sectional view along line AA; Figure 4 This is a partial sectional view of the structure of this utility model; Figure 5 This is a schematic diagram of the pipe compensator structure of this utility model; Figure 6 This is a schematic diagram of the sealing ring assembly structure of this utility model; Figure 7 This is a partial cross-sectional view of the sealing ring assembly structure of this utility model.

[0022] Reference numerals in the attached drawings: 1. Pipe compensator; 2. Connecting block; 3. Sealing ring assembly; 301. Hollow sealing ring; 302. Expansion air inlet pipe; 303. Inflation port one; 304. Pressurized air inlet pipe; 305. Inflation port two; 306. Air outlet; 4. Corrugated pipe; 5. Bolt; 6. Nut; 7. Flange ring; 8. Guide plate; 9. Corrugated cavity. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this 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 merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] like Figures 1-7 As shown, a novel inflatable sealing ring of this embodiment includes a pipe compensator 1. A bellows 4 is provided in the middle section of the pipe compensator 1. Several connecting blocks 2 are provided at both ends of the bellows 4 on the pipe compensator 1. A guide plate 8 for guiding gas and liquid is welded inside the pipe compensator 1. A sealing ring assembly 3 is provided between the guide plate 8 and the inner wall of the pipe compensator 1. The sealing ring assembly 3 is used to seal the bellows 4 during testing. A bolt 5 for limiting the stretching of the bellows 4 is inserted into the connecting block 2. Nuts 6 are threaded to both ends of the bolt 5. The nuts 6 are located on one side of the connecting block 2.

[0025] like Figure 1-5As shown, the middle section of the pipe compensator 1 is equipped with a bellows 4. The bellows 4 is made of 304 stainless steel and is processed by hydraulic forming, which has good elasticity and expansion performance and can absorb the stress generated by the thermal expansion and contraction of the pipeline. Several connecting blocks 2 are provided at both ends of the bellows 4 on the pipe compensator 1. The connecting blocks 2 are evenly distributed around the flange ring 7. Bolts 5 are inserted into the connecting blocks 2 to limit the stretching of the bellows 4. The bolts 5 pass through the connecting blocks 2 at both ends and are locked by nuts 6 to limit the excessive stretching of the bellows 4. Nuts 6 are threaded to both ends of the bolts 5. The nuts 6 are located on one side of the connecting block 2. Elastic washers are also provided between the nuts 6 and the connecting blocks 2. The elastic washers are used to buffer the tightening stress of the bolts 5. Flange rings 7 are provided at both ends of the pipe compensator 1 for connection and fixation with the pipeline. The flange rings 7 at both ends of the pipe compensator 1 are connected to the gas and water pipelines by bolts. The sealing surface is precision ground to ensure the sealing performance after connection with the pipeline.

[0026] like Figure 6 As shown, a sealing ring assembly 3 is provided between the inner wall of the guide plate 8 and the pipe compensator 1. The sealing ring assembly 3 adopts a hollow sealing and dual-pipe independent design, with a compact structure and clear functional division. The sealing ring assembly 3 is used to seal the bellows 4 during inspection. The sealing ring assembly 3 includes a hollow sealing ring 301 set between the guide plate 8 and the inner wall of the pipe compensator 1. The cross-section of the hollow sealing ring 301 is circular. The hollow sealing ring 301 is integrally vulcanized with aging-resistant and media corrosion-resistant fluororubber or silicone rubber, which has good elasticity and sealing performance. An expansion inflation pipe 302 and a pressurizing inflation pipe 304 are respectively provided on the hollow sealing ring 301. The expansion inflation pipe 302 is used to expand the hollow sealing ring 301 to seal the corrugated cavity 9. One end of the expansion inflation pipe 302 is connected to the hollow section of the hollow sealing ring 301 to facilitate inspection. The hollow sealing ring 301 is inflated. The other end of the expansion tube 302 is provided with an inflation port 303, which is connected to an external inflation mechanism. The pressurized inflation tube 304 is used to pressurize the gas filling the corrugated cavity 9, thereby detecting whether the corrugated tube 4 is damaged. The pressurized inflation tube 304 passes through the hollow sealing ring 301 and is not connected to the hollow part of the hollow sealing ring 301 to prevent the expansion tube 302 and the pressurized inflation tube 304 from interfering with each other. The pressurized inflation tube 304 is provided with an inflation port 305 and an outlet 306 at both ends. The inflation port 305 is connected to an external inflation mechanism, and the outlet 306 is located inside the corrugated cavity 9 to fill the corrugated cavity 9 with gas. When the pressure inside the corrugated cavity 9 is high, a metal ring is used outside the hollow sealing ring 301 to prevent the hollow sealing ring 301 from moving outward.

[0027] like Figure 7As shown, after the hollow sealing ring 301 is inflated, it has an interference fit with the guide plate 8 and the bellows 4. Both the expansion inflation pipe 302 and the pressurization inflation pipe 304 are high-pressure resistant hoses to ensure their stability in the inflation and pressurization working environment. The outer walls of the expansion inflation pipe 302 and the pressurization inflation pipe 304 are printed with functional markings to facilitate quick identification by on-site operators and avoid incorrect pipe connection. Inflation port 1 303 and inflation port 2 305 can be equipped with sealing valves. The sealing valves are one-way valves or shut-off valves and are used to maintain the pressure inside the pipe after inflation.

[0028] like Figure 3 As shown, the pipeline compensator 1 has a guide plate 8 welded inside for guiding gas and liquid flow. The guide plate 8 guides the gas and liquid flow and prevents the medium from directly impacting the bellows 4. When the hollow sealing ring 301 is inflated through the expansion and inflation pipe 302, it will expand to both sides along the annular groove, forming an interference fit with the annular groove wall of the guide plate 8 and the inner wall of the pipeline compensator 1, quickly filling the gap and forming a seal. This allows the bellows 4, the guide plate 8, and the hollow sealing ring 301 to jointly enclose and form a closed corrugated cavity 9. A corrugated cavity 9 is formed between the guide plate 8 and the bellows 4. The corrugated cavity 9 provides detection conditions for detecting whether the bellows 4 is damaged. The air outlet 306 is located inside the corrugated cavity 9, which facilitates the entry of external gas into the corrugated cavity 9.

[0029] The working principle of this embodiment is as follows: The hollow sealing ring 301 of the sealing ring assembly 3 is fitted onto the outer wall of one end of the guide plate 8. The functional markings on the outer walls of the expansion inflation pipe 302 and the pressurization inflation pipe 304 are confirmed to be clear. External inflation mechanisms are connected to inflation ports 1 (303) and 2 (305), along with pressure gauges, which are respectively connected to inflation ports 1 (303) and 2 (305) to ensure tight pipe connections without leakage. First, air is slowly injected into the expansion inflation pipe 302 using an external air pump. Gas is then injected into the hollow sealing ring... In the hollow section of sealing ring 301, the hollow sealing ring 301 expands to both sides along the annular groove of the guide plate 8, forming an interference fit with the groove wall of the guide plate 8 and the inner wall of the pipe compensator 1. After filling the gap, the sealing valve of the first air inlet 303 is closed. At this time, the bellows 4, the guide plate 8 and the hollow sealing ring 301 enclose a sealed corrugated cavity 9. Then, the sealing valve of the second air inlet 305 is opened, and air is injected into the corrugated cavity 9 through another air pump via the pressurized air inlet pipe 304. The air outlet 306 releases the air. The body is introduced into the cavity. The test pressure is set according to the working pressure of the bellows 4. After the preset pressure is reached, the sealing valve of the second inflation port 305 is closed. When the pressure inside the bellows cavity 9 is high, a metal ring is used to prevent the hollow sealing ring 301 from moving outward. The pressure holding program is started. During the pressure holding period, the pressure gauge value is monitored in real time. If the pressure is stable and does not drop, it means that there is no leak in the bellows 4 and the sealing performance is good. If the pressure drops slowly, soapy water should be applied to the surface of the bellows 4. The bubbling point is the leak point. Mark the location for subsequent maintenance. If the pressure drops suddenly, stop the test immediately and check whether the connection of the pressurizing air pipe 304 is loose. After eliminating the pipeline leak, retest. After the test is completed, first slowly open the sealing valve of the second inflation port 305 to release the pressure in the bellows cavity 9. After the pressure gauge returns to zero, close it. Then open the sealing valve of the first inflation port 303 to purge the gas in the hollow sealing ring 301. The entire test process is completed, and the pipeline compensator 1 is restored to working state.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A novel inflatable sealing ring, comprising a pipe compensator (1), characterized in that: The middle section of the pipe compensator (1) is provided with a bellows (4), and both ends of the bellows (4) are provided with a number of connecting blocks (2) located on the pipe compensator (1). The pipe compensator (1) is equipped with a guide plate (8) for guiding gas and liquid. A sealing ring assembly (3) is provided between the guide plate (8) and the inner wall of the pipe compensator (1), and the sealing ring assembly (3) is used to seal the bellows (4) during inspection. The connecting block (2) is fitted with a bolt (5) to restrict the stretching of the bellows (4). Both ends of the bolt (5) are connected to nuts (6) by threads. The nuts (6) are located on one side of the connecting block (2).

2. The novel inflatable sealing ring according to claim 1, characterized in that, The sealing ring assembly (3) includes a hollow sealing ring (301) disposed between the guide plate (8) and the inner wall of the pipe compensator (1). An expansion inflation pipe (302) and a pressurization inflation pipe (304) are respectively disposed on the hollow sealing ring (301). One end of the expansion inflation pipe (302) is connected to the hollow section of the hollow sealing ring (301). The other end of the expansion inflation pipe (302) is provided with an inflation port (303). The pressurization inflation pipe (304) penetrates the hollow sealing ring (301) and is not connected to the hollow part of the hollow sealing ring (301). The two ends of the pressurization inflation pipe (304) are respectively provided with an inflation port (305) and an air outlet (306).

3. The novel inflatable sealing ring according to claim 2, characterized in that, A corrugated cavity (9) is formed between the guide plate (8) and the corrugated pipe (4), and the air outlet (306) is located inside the corrugated cavity (9).

4. The novel inflatable sealing ring according to claim 1, characterized in that, Both ends of the pipe compensator (1) are provided with flange rings (7) for connecting and fixing with the pipe.

5. The novel inflatable sealing ring according to claim 1, characterized in that, An elastic washer is also provided between the nut (6) and the connecting block (2), and the elastic washer is used to buffer the tightening stress of the bolt (5).

6. The novel inflatable sealing ring according to claim 2, characterized in that, The hollow sealing ring (301) is integrally vulcanized with aging-resistant rubber material. After the hollow sealing ring (301) is inflated, it is interference-fitted with the guide plate (8) and the bellows (4).

7. The novel inflatable sealing ring according to claim 2, characterized in that, Both the expansion inflation tube (302) and the pressurization inflation tube (304) are high-pressure resistant hoses, and the outer walls of both the expansion inflation tube (302) and the pressurization inflation tube (304) are printed with functional markings.

8. The novel inflatable sealing ring according to claim 2, characterized in that, Both the first inflation port (303) and the second inflation port (305) are equipped with sealing valves. The sealing valves are either one-way valves or shut-off valves. The sealing valves are used to maintain the pressure inside the pipeline after inflation.

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