Air separation cold box breather valve sealing structure
By using meshed upper and lower toothed gaskets on the air-separated cold box breathing valve, combined with temperature measuring probe monitoring, the air leakage problem caused by aging of a single-layer seal is solved, and the sealing performance and safety are improved , reduces cold loss and energy consumption.
Patent Information
- Application Number
- CN202421182486.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-28
AI Technical Summary
The single-layer flat gasket of the existing air-separated cold box breathing valve is prone to damage or aging, resulting in air leakage, increasing cold damage and energy consumption, posing safety hazards and poor operating economy problems.
The upper toothed sealing gasket and the lower toothed sealing gasket are both circular. The first saw tooth is meshed with the second saw tooth, combined with silicon rubber material, enhance the sealing performance, and a temperature measuring probe is installed at the breathing safety valve. , monitor sealing effect and temperature changes, and update the sealing gasket in a timely manner.
It effectively avoids leakage caused by aging of the sealing gasket, enhances sealing performance, reduces cold losses and increased energy consumption, reduces safety hazards and poor operating economy, and has great significance for reference and improvement in the industry.
Smart Images
Figure CN222351534U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of air separation cold boxes, and more specifically to a sealing structure of a breathing valve of an air separation cold box. Background Art
[0002] The cold boxes in the currently operating industrial air separation device (oxygen generator) system are equipped with breathing safety valves to prevent the safety hazards caused by overpressure caused by the leakage of low-temperature media in the internal containers and pipelines of the cold boxes. When the pressure in the cold box reaches the upper limit pressure (0.8Kpa), the upper cover valve plate of the breathing safety valve will be pushed open due to the internal air pressure to release the pressure, thereby protecting the cold box from pressure damage and reducing the degree of damage.
[0003] Since the valve cover and the base are sealed by a single-layer flat gasket, the gasket is prone to damage or aging, resulting in air leakage from the damaged gasket during normal operation of the cold box, and the cold air in the cold box is brought out. The bringing out of cold air, firstly, increases the cold loss of the device and the increase of the energy consumption of the device operation, and secondly, the cold air is brought out by the valve, which is very easy to freeze the valve body and the cold box steel plate around the valve. Usually, a set of air separation unit cold box is installed with multiple safety valves, which are distributed at different heights of the cold box (usually the height of the cold box is 35m-70m). Because it can only rely on human visual judgment, it is not easy to find slight leakage in the early stage. In addition, the height makes daily inspection and maintenance extremely inconvenient. Therefore, once this type of safety valve has a sealing problem, the air separation unit will have poor operating economy and greater safety hazards. Utility Model Content
[0004] The purpose of the utility model is to overcome the shortcomings of the prior art that the valve cover and the base are sealed by a single-layer flat gasket, which is prone to damage or aging of the gasket, resulting in air leakage from the damaged gasket during normal operation of the cold box, causing poor operating economy and greater safety hazards in the air separation device. A sealing structure for an air separation cold box breathing valve is provided to solve the above shortcomings.
[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:
[0006] The utility model discloses a sealing structure of a breathing valve of an air separation cold box, comprising an upper cover and a valve seat, wherein the upper cover is clamped on the upper end of the valve seat, an upper corrugated tooth-shaped sealing gasket is arranged at the bottom of the upper cover, a lower corrugated tooth-shaped sealing gasket is arranged at the upper end of the valve seat, both the upper corrugated tooth-shaped sealing gasket and the lower corrugated tooth-shaped sealing gasket are circular ring-shaped, a first sawtooth is arranged on the upper corrugated tooth-shaped sealing gasket, a second sawtooth is arranged on the lower corrugated tooth-shaped sealing gasket, and the first sawtooth is meshed with the second sawtooth.
[0007] Preferably, the upper wave-toothed sealing gasket and the lower wave-toothed sealing gasket are both made of silicone rubber VMQ, the outer diameters of the upper wave-toothed sealing gasket and the lower wave-toothed sealing gasket are both 560mm, the inner diameters of the upper wave-toothed sealing gasket and the lower wave-toothed sealing gasket are both 520mm, and the thicknesses of the upper wave-toothed sealing gasket and the lower wave-toothed sealing gasket are both 8mm.
[0008] Preferably, the tooth tip spacing between the first sawtooth and the second sawtooth is 4 mm, the tooth height of the first sawtooth and the second sawtooth is 4 mm, and the angle between two adjacent teeth on the first sawtooth and the second sawtooth is 45°.
[0009] Preferably, an outer edge is connected to the outer wall of the upper end of the valve seat, the outer diameter of the outer edge is 560 mm, the inner diameter of the valve seat is 520 mm, a breathing barrel is clamped on the outer side of the lower end of the valve seat, and an air separation cold box is arranged on the side of the breathing barrel.
[0010] Preferably, a temperature measuring probe is also provided on the valve seat, one end of the temperature measuring probe passes through the outer wall of the breathing barrel and leaks out, and the other end of the temperature measuring probe is arranged in the valve seat, and the temperature measuring probe is used to monitor the real-time temperature in the valve seat.
[0011] Preferably, the upper cover is provided with a top cover plate and an outer plate, the outer plate is connected to the outer side of the top cover plate, the bottom of the outer plate protrudes from the bottom of the outer edge, and the inner diameter of the outer plate is equal to the outer diameter of the outer edge.
[0012] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:
[0013] The utility model discloses a sealing structure of a breathing valve of an air-separation cold box. By respectively installing an upper corrugated tooth-shaped sealing gasket and a lower corrugated tooth-shaped sealing gasket on an upper cover and a valve seat of a breathing safety valve, the sealing surfaces are tightly meshed and the sealing performance is enhanced, thereby avoiding leakage of the flat sealing gasket due to long-term aging. A temperature measuring probe is installed at the breathing safety valve, and the sealing effect at the upper cover and the valve seat is monitored in time through temperature changes, so as to obtain information on changes in sealing performance and abnormal cold leakage, so as to update the sealing gasket in advance, thereby avoiding the problem of safety hazards and poor operating economy caused by cold loss and increased energy consumption of the air-separation device due to cold leakage at this place. The utility model has great significance for reference and improvement in the same industry. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a sealing structure diagram of a breathing valve of an air separation cold box of the utility model;
[0015] Figure 2 for Figure 1 Enlarged view of point A in the middle;
[0016] Figure 3 for Figure 2 Enlarged view of point B in the middle;
[0017] Figure 4 is a top view of the upper corrugated toothed sealing gasket;
[0018] Figure 5 It is a bottom view of the upper cover of the utility model.
[0019] In the figure: 1. upper cover; 11. upper corrugated gasket; 111. first serration; 12. top cover plate; 13. outer side plate; 2. valve seat; 21. lower corrugated gasket; 22. outer edge; 211. second serration; 3. breathing barrel; 4. air separation cold box; 5. temperature measuring probe. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.
[0022] Combination Figure 1-Figure 4 The utility model discloses a sealing structure of a breathing valve of an air separation cold box, comprising an upper cover 1 and a valve seat 2. The upper cover 1 is clamped on the upper end of the valve seat 2. An upper corrugated tooth-shaped sealing gasket 11 is arranged at the bottom of the upper cover 1. A first serration 111 is arranged at the bottom of the upper corrugated tooth-shaped sealing gasket 11. The serrations on the first serration 111 are continuously and evenly distributed. A lower corrugated tooth-shaped sealing gasket 21 is arranged at the upper end of the valve seat 2. A second serration 211 is arranged at the upper end of the lower corrugated tooth-shaped sealing gasket 21. The serrations on the second serration 211 are continuously and evenly distributed. The first serration 111 is tightly meshed with the second serration 211. Both the upper corrugated tooth-shaped sealing gasket 11 and the lower corrugated tooth-shaped sealing gasket 21 are in the shape of annular rings, so that the upper cover 1 can be pushed open for pressure relief due to the internal air pressure of the device, thereby reducing the degree of pressure damage to the cold box.
[0023] The upper wave-toothed sealing gasket 11 and the lower wave-toothed sealing gasket 21 are both made of silicone rubber VMQ. The upper wave-toothed sealing gasket 11 and the lower wave-toothed sealing gasket 21 have the same size. The outer diameters of the upper wave-toothed sealing gasket 11 and the lower wave-toothed sealing gasket 21 are both 560 mm, the inner diameters of the upper wave-toothed sealing gasket 11 and the lower wave-toothed sealing gasket 21 are both 520 mm, and the thicknesses of the upper wave-toothed sealing gasket 11 and the lower wave-toothed sealing gasket 21 are both 8 mm.
[0024] Combination Figure 3The tooth height of the first saw tooth 111 and the second saw tooth 211 are both 4 mm, the tooth tip spacing of the first saw tooth 111 and the second saw tooth 211 is both 4 mm, and the angle between two adjacent teeth on the first saw tooth 111 and the second saw tooth 211 is both 45°. Since the first saw tooth 111 and the second saw tooth 211 have the same size and the angle between the saw teeth is 45°, the saw teeth are tightly meshed.
[0025] Combine 1 and Figure 2 The outer wall of the upper end of the valve seat 2 is connected with an outer edge 22, the outer diameter of the outer edge 22 is 560mm, the inner diameter of the valve seat 2 is 520mm, and a breathing barrel 3 is engaged with the outer end of the valve seat 2, the outer diameter of the breathing barrel 3 is less than 560mm, and an air separation cold box 4 is arranged on the side of the breathing barrel 3.
[0026] A temperature measuring probe 5 is also provided on the valve seat 2. One end of the temperature measuring probe 5 passes through the outer wall of the breathing barrel 3 and leaks out, and the other end of the temperature measuring probe 5 is arranged in the valve seat 2. The temperature measuring probe 5 is used to monitor the real-time temperature of the breathing valve to determine whether the sealing effect between the upper cover 1 and the valve seat 2 is abnormal.
[0027] Combination Figure 2 and Figure 5 A top cover plate 12 and an outer plate 13 are provided on the upper cover 1. The outer plate 13 is connected to the outer side of the top cover plate 12. The bottom of the outer plate 13 protrudes from the bottom of the outer edge 22. The inner diameter of the outer plate 13 is equal to the outer diameter of the outer edge 22.
[0028] Working principle: The upper cover 1 is engaged on the valve seat 2, and the valve seat 2 is engaged in the breathing barrel 3. The first serration 111 at the bottom of the upper corrugated tooth sealing gasket 11 is tightly meshed with the second serration 211 on the upper part of the lower corrugated tooth sealing gasket 21, so that the upper cover 1 and the valve seat 2 are tightly sealed. The temperature measuring probe 5 is passed through the inner wall of the breathing barrel 3 and the lower end of the valve seat 2. The temperature change displayed by the temperature measuring probe 5 is used to determine whether the sealing effect between the upper cover 1 and the valve seat 2 is abnormal. If the sealing performance changes and abnormal leakage of cold air are found, the upper corrugated tooth sealing gasket 11 and the lower corrugated tooth sealing gasket 21 shall be replaced in time.
[0029] In summary: the utility model is an air separation cold box breathing valve sealing structure, by respectively installing an upper corrugated tooth sealing gasket 11 and a lower corrugated tooth sealing gasket 21 on the upper cover 1 and the valve seat 2 of the breathing safety valve, so that the sealing surface is tightly meshed and the sealing performance is enhanced, thereby avoiding the leakage of the flat sealing gasket due to long-term aging; a temperature measuring probe 5 is installed at the breathing safety valve, and the sealing effect of the upper cover 1 and the valve seat 2 is monitored in time through temperature changes, so as to grasp the information of the changes in the sealing performance and the abnormal leakage of cold, so as to update the sealing gasket in advance, thereby avoiding the cold loss and energy consumption of the air separation unit caused by the leakage at this place, resulting in safety hazards and poor operating economy, and the utility model has a great significance for reference and improvement in the same industry.
[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A sealing structure for a breathing valve of an air separation cold box, comprising an upper cover (1) and a valve seat (2), characterized in that: The upper cover (1) is engaged with the upper end of the valve seat (2); an upper corrugated tooth-shaped sealing gasket (11) is arranged at the bottom of the upper cover (1); a lower corrugated tooth-shaped sealing gasket (21) is arranged at the upper end of the valve seat (2); the upper corrugated tooth-shaped sealing gasket (11) and the lower corrugated tooth-shaped sealing gasket (21) are both annular; a first sawtooth (111) is arranged on the upper corrugated tooth-shaped sealing gasket (11); a second sawtooth (211) is arranged on the lower corrugated tooth-shaped sealing gasket (21); the first sawtooth (111) meshes with the second sawtooth (211).
2. The air separation cold box breathing valve sealing structure according to claim 1 is characterized in that: The upper corrugated tooth-shaped sealing pad (11) and the lower corrugated tooth-shaped sealing pad (21) are both made of silicone rubber VMQ material, the outer diameters of the upper corrugated tooth-shaped sealing pad (11) and the lower corrugated tooth-shaped sealing pad (21) are both 560 mm, the inner diameters of the upper corrugated tooth-shaped sealing pad (11) and the lower corrugated tooth-shaped sealing pad (21) are both 520 mm, and the thicknesses of the upper corrugated tooth-shaped sealing pad (11) and the lower corrugated tooth-shaped sealing pad (21) are both 8 mm.
3. The air separation cold box breathing valve sealing structure according to claim 1 is characterized in that: The tooth tip spacing of the first sawtooth (111) and the second sawtooth (211) is 4 mm, the tooth height of the first sawtooth (111) and the second sawtooth (211) is 4 mm, and the angle between two adjacent teeth on the first sawtooth (111) and the second sawtooth (211) is 45°.
4. The air separation cold box breathing valve sealing structure according to claim 1 is characterized in that: The outer wall of the upper end of the valve seat (2) is connected to an outer edge (22), the outer diameter of the outer edge (22) is 560 mm, the inner diameter of the valve seat (2) is 520 mm, the lower end of the valve seat (2) is externally engaged with a breathing barrel (3), and an air separation cold box (4) is arranged on the side of the breathing barrel (3).
5. The air separation cold box breathing valve sealing structure according to claim 4 is characterized in that: The valve seat (2) is also provided with a temperature measuring probe (5), one end of the temperature measuring probe (5) passes through the outer wall of the breathing barrel (3) and leaks out, and the other end of the temperature measuring probe (5) is arranged inside the valve seat (2). The temperature measuring probe (5) is used to monitor the real-time temperature inside the valve seat (2).
6. The air separation cold box breathing valve sealing structure according to claim 1 is characterized in that: The upper cover (1) is provided with a top cover plate (12) and an outer plate (13), wherein the outer plate (13) is connected to the outer side of the top cover plate (12), the bottom of the outer plate (13) protrudes from the bottom of the outer edge (22), and the inner diameter of the outer plate (13) is equal to the outer diameter of the outer edge (22).