High-pressure blind plate sealing structure

Abstract

The utility model discloses a high-pressure blind plate sealing structure which comprises an annular groove formed in a blind plate, a sealing ring is placed in the annular groove, the sealing ring is elastic and telescopic, the sealing ring is provided with an air storage cavity, and the air storage cavity is arranged around the central axis of the sealing ring. The opening direction of the air storage cavity faces the inner side of the sealing ring and is obliquely arranged relative to the opening direction of the annular groove, the two side ends of the opening of the air storage cavity extend to form a first air blocking part and a second air blocking part respectively, the second air blocking part is located in the annular groove, and the first air blocking part is located outside the annular groove. The side faces of the opposite sides of the first air blocking part and the second air blocking part are arc faces. The sealing performance of the sealing ring on the blind plate of the large-caliber combined type separator can be improved.

Description

Technical Field

[0001] This utility model relates to the technical field of separator blind plate sealing, and in particular to a high-pressure blind plate sealing structure. Background Technology

[0002] A modular separator is a device that combines multiple separation technologies, typically including modules such as pre-filtration, fine filtration, and drainage. Its modular design achieves a perfect balance between high-efficiency filtration and a compact structure. It is suitable for compressor systems of all sizes, and performs particularly well in large industrial applications.

[0003] The working principle of the combined separator is based on multi-stage filtration and gravity separation, including the use of compressed air through a pre-filtration module to remove larger particles. Therefore, compressed air is contained inside the combined separator housing, and a combined separator blind flange is installed at the end of the housing for use at the end of containers such as natural gas pipelines, enabling rapid opening and closing operations.

[0004] Blind flange seals for combined separators typically use sealing rings. However, due to the poor load-bearing capacity of current sealing rings or the sealing rings not being properly positioned after the blind flange is closed, repeated leakage occurs when the sealing rings attempt to seal large-diameter combined separator blind flanges. Leakage from the separator blind flange leads to media leakage, which not only affects the normal operation of the equipment but may also pose hazards to the environment and operators. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a high-pressure blind flange sealing structure, which can improve the sealing performance of the sealing ring for the blind flange of a large-diameter combined separator.

[0006] To solve the above-mentioned technical problems, the high-pressure blind flange sealing structure provided by this utility model adopts the following technical solution:

[0007] A high-pressure blind flange sealing structure includes an annular groove formed in the blind flange, a sealing ring placed in the annular groove, the sealing ring being elastically expandable and contractible, and a gas storage cavity formed in the sealing ring. The gas storage cavity is arranged around the central axis of the sealing ring, and the opening direction of the gas storage cavity faces the inside of the sealing ring and is inclined relative to the opening direction of the annular groove. The two ends of the opening of the gas storage cavity extend to form a first gas blocking part and a second gas blocking part, respectively. The second gas blocking part is located inside the annular groove, and the first gas blocking part is located outside the annular groove. The opposite side surfaces of the first and second gas blocking parts are both arc-shaped.

[0008] By adopting the above technical solution, the sealing ring is fitted and embedded in the annular groove. Since the opening of the gas storage chamber faces inwards towards the sealing ring and is inclined relative to the opening direction of the annular groove, after the blind plate and separator housing are closed, the separator housing is filled with compressed gas. The gas can enter the gas storage chamber through the gap between the first and second gas-blocking parts, compressing the first and second gas-blocking parts to fully open them. This ensures that the first gas-blocking part tightly abuts against the separator housing, and the second gas-blocking part tightly abuts against the inner wall of the annular groove, thus pressing the sealing ring tightly against the inner wall of the annular groove. This prevents compressed gas from leaking out through the gap between the sealing ring and the separator housing and the inner wall of the annular groove, improving the sealing performance of the sealing ring for the large-diameter combined separator blind plate. Furthermore, since the sealing ring and the first and second gas-blocking parts are compressed by the pressure of the compressed gas itself, the upper limit of the sealing pressure can be increased. This achieves excellent sealing performance even when sealing high-pressure compressed gas within the separator, improving practicality and applicability.

[0009] Optionally, the curvature of the arc surface of the first air-blocking part is 0.16-0.21.

[0010] By adopting the above technical solution, since the sealing ring is elastic, to ensure that the sealing ring is securely nested in the annular groove, the diameter of the sealing ring in its normal state is smaller than the diameter of the blind plate. This is achieved by stretching the sealing ring for a tight fit. However, after the sealing ring is stretched, the first and second gas-blocking parts become thinner and tend to close due to tension. This results in gas being unable to pass through the gap between the first and second gas-blocking parts into the gas storage chamber, or only entering in small quantities, after the cover is closed. Consequently, the first and second gas-blocking parts cannot open and respectively press against the separator housing and the inner wall of the annular groove, leading to gas leakage. Setting the curvature of the first gas-blocking part within the above-mentioned range allows it to have greater thickness and support. The curvature value within this range is determined by the diameter of the seal; the larger the diameter, the greater the curvature value, and the smaller the seal, the smaller the curvature value. When the sealing ring is stretched, the first gas-blocking part is less prone to deformation, thus preventing the first and second gas-blocking parts from closing. This allows the first and second gas-blocking parts to fully open after the cover is closed due to gas entry, further improving the sealing performance of the sealing ring on the large-diameter combined separator blind plate. Furthermore, because the first air-blocking part with the aforementioned curvature is injected with rubber into the corresponding mold during the manufacturing process, it is less likely to generate trapped air, thus improving the first-pass yield of the finished product.

[0011] Optionally, the cross-sectional profile of the inner wall of the gas storage cavity is arc-shaped.

[0012] By adopting the above technical solution, the arc-shaped inner wall allows the compressed gas to enter the gas storage chamber and apply a more uniform force to the sealing ring, so that the outer wall of the sealing ring can fit more comprehensively and evenly and tightly against the inner wall of the annular groove, thus ensuring the sealing effect.

[0013] Optionally, the sealing ring has a filling rate of 94-96% in the annular groove.

[0014] By adopting the above technical solution, the filling rate can be increased to the above range compared with the existing technology, making the gap between the sealing ring, the second air-blocking part and the inner wall of the annular groove smaller, and making the gap between the first air-blocking part and the separator housing smaller after the cover is closed, thereby improving the sealing ring to achieve excellent sealing effect in high-pressure sealing application scenarios.

[0015] Optionally, the vertical side length of the projected cross-section of the sealing ring is 16-17mm, the horizontal side length is 18-19mm, and the distance from the highest point of the first air-blocking part to the bottom edge of the sealing ring is 21-22mm.

[0016] Optionally, the sealing ring has a movable hole, which is arranged around the central axis of the sealing ring. One end of the movable hole is connected to the gas storage chamber, and the other end of the movable hole extends away from the first gas blocking part and passes through the sealing ring.

[0017] By adopting the above technical solution, after the compressed gas enters the gas storage chamber, it then enters the movable hole. The gas entering the movable hole exerts a force on the sealing ring away from its center, causing the sealing ring to more tightly abut against the inner wall of the annular groove on the side furthest from its center, thus achieving a better sealing effect. Furthermore, because the filling rate of the sealing ring in the annular groove reaches 94-96%, the compressed gas entering the movable hole will not leak out through the gap between the sealing ring and the inner wall of the annular groove. The movable hole also provides lateral movement allowance for the sealing ring, preventing it from jamming and becoming difficult to extend even with a filling rate of 94-96%, ensuring a tight fit between the sealing ring and the inner wall of the annular groove.

[0018] Optionally, the movable hole is a T-shaped hole, with the larger end of the movable hole located away from the first air-blocking part.

[0019] By adopting the above technical solution, the larger end of the movable hole can accommodate more gas, so as to apply greater pressure to the part of the sealing ring away from the gas storage chamber, so that the sealing ring can fit better and tighter against the inner wall of the annular groove, thereby improving the sealing effect.

[0020] Optionally, the outer circular surface of the sealing ring is provided with a supporting ridge, the supporting ridge being coaxially arranged with the sealing ring and the supporting ridge being located close to the movable hole.

[0021] By adopting the above technical solution, the supporting ridge can prevent the part of the sealing ring near the moving hole from being recessed and deformed inward, so as to ensure that the sealing ring can fit more tightly against the inner wall of the annular groove and thus ensure the sealing effect.

[0022] Optionally, a helical spring is embedded in the sealing ring, the helical spring is arranged around the central axis of the sealing ring, and the helical spring is located near the first air-blocking part.

[0023] By adopting the above technical solution, the helical spring can prevent the part of the sealing ring near the air storage cavity from being concave and deformed inward, so as to ensure that the sealing ring can fit more tightly against the inner wall of the annular groove and thus ensure the sealing effect.

[0024] Optionally, the sealing ring has an anti-deformation protrusion on the side of the face away from the annular groove, and the anti-deformation protrusion is coaxially arranged with the sealing ring.

[0025] By adopting the above technical solution, the anti-deformation ridge can prevent the sealing ring from deforming and sinking into the annular groove, so as to ensure that the sealing ring can fit more tightly against the separator housing after the cover is closed, thus ensuring the sealing effect.

[0026] In summary, this utility model has at least one of the following beneficial technical effects:

[0027] 1. After the blind flange and separator housing are closed, the separator housing is filled with compressed gas. The gas can enter the gas storage chamber through the gap between the first and second gas-blocking parts, and squeeze the first and second gas-blocking parts to fully open them. This allows the first gas-blocking part to tightly abut against the separator housing and the second gas-blocking part to tightly abut against the inner wall of the annular groove, and also to tightly press the sealing ring against the inner wall of the annular groove. This prevents gas from leaking out through the gap between the sealing ring and the separator housing and the inner wall of the annular groove, thus improving the sealing performance of the sealing ring for the large-diameter combined separator blind flange. Furthermore, since the sealing ring and the first and second gas-blocking parts are pressed by the pressure of the compressed gas itself, the upper limit of the sealing pressure can be increased. This also achieves excellent sealing effect when sealing high-pressure compressed gas inside the separator, improving practicality and applicability.

[0028] 2. Setting the curvature of the first air-blocking part within the aforementioned range allows it to have greater thickness and support. When the sealing ring is stretched, the first air-blocking part is less prone to deformation, thus preventing the first and second air-blocking parts from closing. This allows the first and second air-blocking parts to fully open after the cover is closed due to the entry of compressed gas, achieving a better sealing effect. Furthermore, because of the aforementioned curvature, the injection of rubber into the corresponding mold during manufacturing reduces the likelihood of air pockets, improving the first-pass yield of the finished product.

[0029] 3. Compared with existing technologies that increase the filling rate to the above range, the gap between the sealing ring, the second air-blocking part and the inner wall of the annular groove can be smaller, and the gap between the first air-blocking part and the separator housing after the cover is closed can be smaller, thereby improving the sealing ring to achieve excellent sealing effect even in high-pressure sealing application scenarios. Attached Figure Description

[0030] Figure 1 This utility model is a schematic diagram of the overall structure of a high-pressure blind flange sealing structure.

[0031] Figure 2 yes Figure 1 A magnified structural diagram of part A in the middle.

[0032] Explanation of reference numerals in the attached drawings: 1. Blind plate; 2. Annular groove; 3. Sealing ring; 4. Air storage chamber; 5. First air blocking part; 6. Second air blocking part; 7. Movable hole; 8. Supporting ridge; 9. Helical spring; 10. Anti-deformation ridge. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-2 The present invention will be described in further detail below.

[0034] This utility model discloses a high-pressure blind flange sealing structure. (Refer to...) Figure 1 and Figure 2 The high-pressure blind flange sealing structure includes an annular groove 2 formed on one side of the blind flange 1. The annular groove 2 is arranged around the central axis of the blind flange 1, and the opening direction of the annular groove 2 is perpendicular to the blind flange 1. A sealing ring 3 is placed inside the annular groove 2, and the sealing ring 3 is coaxially arranged with the annular groove 2. The sealing ring 3 is made of rubber and is elastic and extensible.

[0035] Reference Figure 2 The sealing ring 3 has an air storage cavity 4, which is arranged around the central axis of the sealing ring 3. The opening of the air storage cavity 4 faces inward towards the inside of the sealing ring 3 and is inclined relative to the opening direction of the annular groove 2. The cross-sectional profile of the inner wall of the air storage cavity 4 is arc-shaped. The arc-shaped inner wall allows the compressed gas to enter the air storage cavity 4 and apply a more uniform force to the sealing ring 3, so that the outer wall of the sealing ring 3 can fit more evenly and tightly against the inner wall of the annular groove 2, ensuring a good sealing effect.

[0036] Reference Figure 2The two ends of the opening of the gas storage chamber 4 extend to form a first gas-blocking part 5 and a second gas-blocking part 6, respectively. The second gas-blocking part 6 is located inside the annular groove 2, and the first gas-blocking part 5 is located outside the annular groove 2. The opposite sides of the first gas-blocking part 5 and the second gas-blocking part 6 are both arc-shaped. The vertical side length of the cross-sectional projection of the sealing ring 3 is 16.5 mm, the horizontal side length is 18.5 mm, and the distance from the highest point of the first gas-blocking part 5 to the bottom edge of the sealing ring 3 is 21.5 mm. The filling rate of the sealing ring 3 in the annular groove 2 is 95%. Compared with the existing technology, increasing the filling rate to the above range can make the gap between the sealing ring 3, the second gas-blocking part 6 and the inner wall of the annular groove 2 smaller, and make the gap between the first gas-blocking part 5 and the separator housing smaller after the cover is closed, thereby improving the sealing effect of the sealing ring 3 even in high-pressure sealing scenarios.

[0037] The sealing ring 3 is fitted and embedded in the annular groove 2. Since the opening of the gas storage chamber 4 faces the inside of the sealing ring 3 and is inclined relative to the opening of the annular groove 2, after the blind plate 1 and the separator housing are closed, the separator housing is filled with compressed gas. The compressed gas can enter the gas storage chamber 4 through the gap between the first gas blocking part 5 and the second gas blocking part 6, and squeeze the first gas blocking part 5 and the second gas blocking part 6 to make them fully open. This makes the first gas blocking part 5 tightly abut against the separator housing and the second gas blocking part 6 tightly abut against the inner wall of the annular groove 2, and presses the sealing ring 3 tightly against the inner wall of the annular groove 2, so as to prevent gas from leaking out through the gap between the sealing ring 3 and the separator housing and the inner wall of the annular groove 2, thereby improving the sealing performance of the sealing ring 3 for the large-diameter combined separator blind plate 1. Furthermore, since the sealing ring 3, the first gas blocking part 5, and the second gas blocking part 6 are pressed by the pressure of the compressed gas itself, the upper limit of the sealing pressure can be increased. When sealing compressed gas with high pressure in the separator, it can also achieve excellent sealing effect, thus improving practicality and applicability.

[0038] Because the sealing ring 3 is elastic, in order to ensure that the sealing ring 3 is securely nested in the annular groove 2, the diameter of the sealing ring 3 in its normal state is smaller than the diameter of the blind plate 1. This is achieved by stretching the sealing ring 3 for a tight fit. However, after the sealing ring 3 is stretched, the first gas-blocking part 5 and the second gas-blocking part 6 become thinner and tend to close due to tension. This results in compressed gas being unable to pass through the gap between the first gas-blocking part 5 and the second gas-blocking part 6 into the gas storage chamber 4, or only entering in small quantities. Consequently, the first and second gas-blocking parts 6 cannot open and respectively press against the separator housing and the inner wall of the annular groove 2, leading to gas leakage.

[0039] To solve the above problems, refer to Figure 2Setting the curvature of the first air-blocking part 5 to 0.18 allows it to have greater thickness and support. When the sealing ring 3 is stretched, the first air-blocking part 5 is less prone to deformation, thus preventing the first air-blocking part 5 and the second air-blocking part 6 from closing. This allows the first air-blocking part 5 and the second air-blocking part 6 to fully open due to the entry of compressed gas after the cover is closed, achieving a better sealing effect. Furthermore, because of the curvature of the first air-blocking part 5, it is less prone to air pockets after rubber is injected into the corresponding mold during manufacturing, improving the first-pass yield of the finished product.

[0040] Reference Figure 2 The sealing ring 3 has a movable hole 7. The axis of the movable hole 7 is parallel to the opening direction of the annular groove 2. The movable hole 7 is arranged around the central axis of the sealing ring 3. One end of the movable hole 7 is connected to the air storage chamber 4, and the other end of the movable hole 7 extends away from the first air blocking part 5 and passes through the sealing ring 3. The movable hole 7 is a T-shaped hole, and the larger end of the movable hole 7 is located away from the first air blocking part 5.

[0041] After compressed gas enters the gas storage chamber 4, it then enters the movable hole 7. The compressed gas entering the movable hole 7 exerts a force on the sealing ring 3 away from its center, causing the sealing ring 3 to more tightly abut against the inner wall of the annular groove 2 on the side furthest from its center, achieving a better sealing effect. Furthermore, since the filling rate of the sealing ring 3 in the annular groove 2 reaches 94-96%, the compressed gas entering the movable hole 7 will not leak out through the gap between the sealing ring 3 and the inner wall of the annular groove 2. The movable hole 7 also provides lateral movement allowance for the sealing ring 3, preventing it from jamming and becoming difficult to extend even with a filling rate of 94-96%, ensuring a tight fit between the sealing ring 3 and the inner wall of the annular groove 2. The larger end of the movable hole 7 can accommodate more compressed gas, allowing greater pressure to be applied to the part of the sealing ring 3 furthest from the gas storage chamber 4, resulting in a better and tighter fit between the sealing ring 3 and the inner wall of the annular groove 2, improving the sealing effect.

[0042] Reference Figure 2 To further ensure the sealing effect of the sealing ring 3, multiple supporting ridges 8 are fixed on the outer circular surface of the sealing ring 3. These supporting ridges 8 are arranged at intervals along the axis of the sealing ring 3, are coaxial with the sealing ring 3, and are located close to the movable hole 7. The supporting ridges 8 prevent the portion of the sealing ring 3 near the movable hole 7 from inwardly deforming, ensuring that the sealing ring 3 can better and more tightly fit against the inner wall of the annular groove 2, thus guaranteeing the sealing effect.

[0043] Reference Figure 2A helical spring 9 is embedded in the sealing ring 3. The helical spring 9 is arranged around the central axis of the sealing ring 3 and is located near the first air-blocking part 5. The helical spring 9 can prevent the part of the sealing ring 3 near the air storage cavity 4 from being concave and deformed inward, so as to ensure that the sealing ring 3 can better fit tightly against the inner wall of the annular groove 2 and ensure the sealing effect.

[0044] Reference Figure 2 The sealing ring 3 has an anti-deformation protrusion 10 on the side of the sealing ring 3 away from the annular groove 2. The anti-deformation protrusion 10 is coaxially arranged with the sealing ring 3. The anti-deformation protrusion 10 can prevent the sealing ring 3 from deforming and sinking into the annular groove 2, so as to ensure that the sealing ring 3 can better fit tightly against the separator housing after the cover is closed, thus ensuring the sealing effect.

[0045] The implementation principle of the high-pressure blind flange sealing structure of this utility model embodiment is as follows: A sealing ring 3 is fitted and embedded within the annular groove 2. Since the opening direction of the gas storage chamber 4 faces the inner side of the sealing ring 3 and is inclined relative to the opening direction of the annular groove 2, after the blind flange 1 and the separator housing are closed, the separator housing is filled with compressed gas. The gas can enter the gas storage chamber 4 through the gap between the first gas-blocking part 5 and the second gas-blocking part 6, and compress the first gas-blocking part 5 and the second gas-blocking part 6 to fully open them. This allows the first gas-blocking part 5 to tightly abut against the separator housing and the second gas-blocking part 6 to tightly abut against the inner wall of the annular groove 2, thus pressing the sealing ring 3 tightly against the inner wall of the annular groove 2. This prevents compressed gas from leaking out through the gap between the sealing ring 3 and the separator housing and the inner wall of the annular groove 2, improving the sealing performance of the sealing ring 3 for the large-diameter combined separator blind flange 1. Furthermore, the upper limit of the sealing pressure can be increased, achieving excellent sealing performance even when sealing high-pressure compressed gas inside the separator, thus improving practicality and applicability.

[0046] After the compressed gas enters the gas storage chamber 4, it then enters the movable hole 7. The compressed gas entering the movable hole 7 exerts a force on the sealing ring 3 away from its center, so that the sealing ring 3 is more tightly pressed against the inner wall of the annular groove 2 on the side away from its center, thereby achieving a better sealing effect.

[0047] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A high-pressure blind flange sealing structure, characterized in that: The device includes an annular groove (2) formed in the blind plate (1), a sealing ring (3) placed in the annular groove (2), the sealing ring (3) being elastically expandable and contractible, and an air storage cavity (4) formed in the sealing ring (3). The air storage cavity (4) is arranged around the central axis of the sealing ring (3). The opening direction of the air storage cavity (4) faces the inside of the sealing ring (3) and is inclined relative to the opening direction of the annular groove (2). The two ends of the opening of the air storage cavity (4) extend to form a first air blocking part (5) and a second air blocking part (6), respectively. The second air blocking part (6) is located inside the annular groove (2), and the first air blocking part (5) is located outside the annular groove (2). The opposite side surfaces of the first air blocking part (5) and the second air blocking part (6) are both arc surfaces.

2. The high-pressure blind flange sealing structure according to claim 1, characterized in that: The curvature of the first air-blocking part (5) is 0.16-0.

21.

3. The high-pressure blind flange sealing structure according to claim 1, characterized in that: The cross-sectional profile of the inner wall of the gas storage cavity (4) is arc-shaped.

4. The high-pressure blind flange sealing structure according to claim 1, characterized in that: The sealing ring (3) has a filling rate of 94-96% in the annular groove (2).

5. The high-pressure blind flange sealing structure according to claim 4, characterized in that: The vertical side length of the cross-sectional projection of the sealing ring (3) is 16-17mm, the horizontal side length is 18-19mm, and the distance from the highest point of the first air-blocking part (5) to the bottom edge of the sealing ring (3) is 21-22mm.

6. The high-pressure blind flange sealing structure according to claim 4, characterized in that: The sealing ring (3) has a movable hole (7) which is arranged around the central axis of the sealing ring (3). One end of the movable hole (7) is connected to the gas storage chamber (4), and the other end of the movable hole (7) extends away from the first gas blocking part (5) and passes through the sealing ring (3).

7. A high-pressure blind flange sealing structure according to claim 6, characterized in that: The movable hole (7) is a T-shaped hole, and the larger end of the movable hole (7) is located away from the first air-blocking part (5).

8. A high-pressure blind flange sealing structure according to claim 6, characterized in that: The outer circular surface of the sealing ring (3) is provided with a supporting protrusion (8), which is coaxial with the sealing ring (3) and is located near the movable hole (7).

9. A high-pressure blind flange sealing structure according to claim 1, characterized in that: The sealing ring (3) is embedded with a helical spring (9), which is arranged around the central axis of the sealing ring (3) and is located near the first air-blocking part (5).

10. A high-pressure blind flange sealing structure according to claim 9, characterized in that: The sealing ring (3) has an anti-deformation protrusion (10) on the side plane away from the annular groove (2), and the anti-deformation protrusion (10) is coaxially arranged with the sealing ring (3).

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