A multi-stage sealing device for a viewing window applicable to high temperature and high pressure

Abstract

The present invention provides a multi-stage sealing device for a viewing window applicable to high temperature and high pressure, which relates to the technical field of viewing window sealing. The multi-stage sealing device includes a viewing window installation base body, and an installation through hole is penetrated and opened on the viewing window installation base body; a viewing glass, the viewing glass is arranged in the installation through hole, a viewing window pressing plate, the viewing window pressing plate presses on one side of the viewing glass; a primary sealing gasket, the primary sealing gasket is arranged between the viewing glass and the viewing window pressing plate; a secondary sealing gasket sleeve, the secondary sealing gasket sleeve is horizontally arranged between the viewing window installation base body and the viewing glass; a viewing window cover plate, the viewing window cover plate is arranged on the upper side of the viewing window pressing plate, and the viewing window cover plate presses against the viewing window installation base body. The present invention has the advantages of good sealing performance and stable structure.

Description

Technical Field

[0001] The present invention relates to the technical field of visual window sealing, and more particularly, to a multi-stage sealing device for a visual window applicable to high temperature and high pressure. Background Art

[0002] In some industrial reaction technologies or experimental devices, it is necessary to observe the internal changes. Therefore, a visual window is usually provided on the side wall of the reaction chamber. Through the visual window, the phenomena inside the reaction chamber can be effectively observed, providing guarantee conditions for in-depth study of the transient phenomena in the reaction chamber. For example, visualization experiments related to reactor thermal-hydraulics, flow boiling visualization experiments, manhole observation devices in the chemical industry, etc. all require the setting of a visual window to observe the internal changes.

[0003] For a chamber under high temperature and high pressure, the sealing design of the visual window is particularly important. The existing visual window structure is realized by a convex platform combined with a sealing ring. However, the convex platform is not easy to process, and invisible cracks are likely to appear during the processing of the convex platform position, and the visualization device is likely to fail during use.

[0004] In summary, we propose a multi-stage sealing device for a visual window applicable to high temperature and high pressure to solve the above technical problems, and at the same time propose a good sealing solution for cross sealing. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-stage sealing device for a visual window applicable to high temperature and high pressure, which has the advantages of good sealing performance and stable structure.

[0006] The embodiments of the present invention are implemented as follows:

[0007] The embodiments of the present application provide a multi-stage sealing device for a visual window applicable to high temperature and high pressure, including:

[0008] A visual window installation base body, the visual window installation base body is the side wall of the reaction chamber, and an installation through hole is penetrated through the visual window installation base body;

[0009] Visual glass, the visual glass is arranged in the installation through hole,

[0010] A visual window pressing plate, the visual window pressing plate is arranged in the installation through hole, and the visual window pressing plate presses on the outer side of the visual glass;

[0011] A primary sealing gasket, the primary sealing gasket is arranged between the visual glass and the visual window pressing plate;

[0012] A secondary sealing gasket, the secondary sealing gasket is circular, the secondary sealing gasket is arranged in the installation through hole, and the secondary sealing gasket sleeved on the visual window pressing plate;

[0013] Window cover plate, the above window cover plate is arranged outside the above visual window pressing plate, and the above window cover plate is window-pressed with the above visual window installation base body.

[0014] In some embodiments of the present invention, the above installation through hole is a countersunk hole, the above visual glass is arranged at the end with a small aperture of the above installation through hole, the above visual window pressing plate is arranged at the end with a large aperture of the above installation through hole, and the outer edge dimensions of the above visual window pressing plate and the above visual glass are the same.

[0015] In some embodiments of the present invention, the above primary gasket is a graphite gasket.

[0016] In some embodiments of the present invention, the above secondary gasket is a packing ring. The inner side of the above secondary gasket is in contact with the outer side of the above visual window pressing plate, and the outer side of the above secondary gasket is in contact with the side wall of the above installation through hole.

[0017] In some embodiments of the present invention, the above window cover plate and the above visual window installation base body are window-pressed detachably by bolts.

[0018] In some embodiments of the present invention, the above window cover plate and the above visual window pressing plate are window-pressed detachably by bolts.

[0019] In some embodiments of the present invention, both between the above window cover plate and the above visual window installation base body and between the above window cover plate and the above visual window pressing plate are window-pressed by a plurality of bolts.

[0020] In some embodiments of the present invention, the above window cover plate is T-shaped. The bottom of the longitudinal part of the T-shaped above window cover plate extends into the above installation through hole to be window-pressed with the above visual window pressing plate, and the diameter of the longitudinal part of the above window cover plate is equal to the diameter of the above installation through hole.

[0021] In some embodiments of the present invention, visual through holes are provided in the middle parts of both the above visual window pressing plate and the above window cover plate.

[0022] In some embodiments of the present invention, the above visual glass is quartz glass.

[0023] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0024] A multi-stage sealing device for a visual window applicable to high temperature and high pressure, comprising:

[0025] A visual window installation base body, the above visual window installation base body is the side wall of a reaction chamber, and an installation through hole is penetrated and provided on the above visual window installation base body;

[0026] Visual glass, the above visual glass is arranged in the above installation through hole,

[0027] Visual window pressing plate, the above visual window pressing plate is arranged in the above installation through hole, and the above visual window pressing plate presses on one side of the above visual glass;

[0028] Primary gasket, the above primary gasket is arranged between the above visual glass and the above visual window pressing plate;

[0029] Secondary gasket, the above secondary gasket is circular, the above secondary gasket is arranged in the above installation through hole, and the above secondary gasket is sleeved on the above visual window pressing plate;

[0030] Window cover plate, the above window cover plate is arranged outside the above visual window pressing plate, and the above window cover plate is connected to the above visual window installation base.

[0031] In the embodiment of the present application, when the chamber operates under high temperature and high pressure conditions, the pressure inside the chamber exerts a certain force on the visual glass, the visual glass exerts the above force on the visual window pressing plate, the visual window pressing plate exerts the above force on the window cover plate, and the window cover plate transmits the above force to the visual window installation base to achieve the function of the visual glass bearing. In the above process, the design of the primary gasket achieves the primary seal of the visual window, realizes horizontal sealing, and has the advantage of preventing leakage. The design of the secondary gasket achieves the secondary seal of the visual window, realizes vertical sealing, and further prevents the leakage of the visual window structure; based on multi-stage sealing, cross sealing is realized. The window cover plate is connected to the above visual window installation base, so that the force of the internal air pressure is transmitted to the visual window installation base through the visual glass, the visual window pressing plate and the window cover plate to achieve the stable installation of the visual window. The design of the present invention has the advantages of good sealing performance and stable structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0033] Figure 1 It is a schematic structural diagram of a visual window multi-stage sealing device suitable for high temperature and high pressure according to an embodiment of the present invention;

[0034] Figure 2 It is a schematic structural diagram of the visual glass according to an embodiment of the present invention;

[0035] Figure 3 It is a schematic structural diagram of the window cover plate according to an embodiment of the present invention;

[0036] Figure 4 It is a schematic structural diagram of the primary gasket according to an embodiment of the present invention;

[0037] Figure 5 This is a schematic structural view of the visual window pressing plate according to an embodiment of the present invention;

[0038] Figure 6 This is a schematic structural view of the secondary gasket according to an embodiment of the present invention.

[0039] Icons: 1 - Visual glass, 2 - Window cover plate, 3 - Visual window pressing plate, 4 - Visual window installation base, 5 - Primary gasket, 6 - Secondary gasket. Detailed implementation manners

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the scope of protection of the present invention.

[0042] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0043] In the description of the embodiments of the present invention, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0044] In addition, if terms such as "horizontal", "vertical", "hanging", etc. are used, it does not mean that the component is required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0045] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Embodiment

[0047] Please refer to Figures 1 - 6 , this embodiment provides a multi-stage sealing device for a visual window applicable under high temperature and high pressure, including:

[0048] A visual window installation base 4, where the visual window installation base 4 is the side wall of the reaction chamber, and an installation through hole is penetrated and opened on the visual window installation base 4;

[0049] A visual glass 1, where the visual glass 1 is arranged in the installation through hole,

[0050] A visual window pressing plate 3, where the visual window pressing plate 3 has a perspective function, the visual window pressing plate 3 is arranged in the installation through hole, and the visual window pressing plate 3 is connected to one side of the visual glass 1;

[0051] A primary sealing gasket 5, where the primary sealing gasket is arranged between the visual glass 1 and the visual window pressing plate 3;

[0052] A secondary sealing gasket 6, where the secondary sealing gasket 6 is annular, the secondary sealing gasket 6 is arranged in the installation through hole, and the secondary sealing gasket 6 is sleeved on the visual window pressing plate 3;

[0053] A window cover plate 2, where the window cover plate 2 has a perspective function, the window cover plate 2 is arranged outside the visual window pressing plate 3, and the window cover plate 2 is connected to the visual window installation base 4.

[0054] It should be noted that both ends of the installation through-hole penetrate through opposite sides of the visual window installation base body 4 respectively. The visual glass 1 is installed inside the installation through-hole and is used to contact the high-pressure gas in the reaction chamber. The visual window pressing plate 3 and the visual glass 1 can be fixedly connected or detachably connected, and both methods are acceptable. For example, the visual window pressing plate 3 and the visual glass 1 can be a glass and a frame structure for connecting the glass, and details will not be elaborated here. Both the visual window pressing plate 3 and the window cover plate 2 have a perspective function, enabling relevant operating personnel to sequentially see through the window cover plate 2, the visual window pressing plate 3, and the visual glass 1 to clearly observe the reaction conditions in the reaction chamber. When the visual window pressing plate 3 is placed inside the installation through-hole, there is a certain gap between the circumferential side of the visual window pressing plate 3 and the inner side of the installation through-hole. A secondary sealing gasket 6 is placed in the above gap to achieve the purpose of sealing the above gap and prevent the high-pressure gas in the reaction chamber from leaking out and affecting the reaction conditions in the reaction chamber. The connection method between the above window cover plate 2 and the above visual window installation base body 4 can be a fixed connection or a detachable connection, and details will not be described here.

[0055] In the embodiment of the present application, when a high-temperature and high-pressure reaction occurs in the reaction chamber, the air pressure in the reaction chamber exerts a certain force on the visual glass 1. The visual glass 1 exerts the above force on the visual window pressing plate 3, and the visual window pressing plate 3 exerts the above force on the window cover plate 2. The window cover plate 2 transmits the above force to the visual window installation base body 4 to achieve the function of the visual glass 1 bearing. In the above process, the design of the primary sealing gasket 5 achieves the primary sealing of the visual window and has the advantage of preventing leakage. The design of the secondary sealing gasket 6 achieves the secondary sealing of the visual window and further prevents the leakage of the visual window structure. The window cover plate 2 is connected to the above visual window installation base body 4, enabling the acting force of the internal air pressure to be transmitted to the visual window installation base body 4 through the visual glass 1, the visual window pressing plate 3, and the window cover plate 2 to achieve the stable installation of the visual window. The design of the present invention has the advantages of good sealing performance and stable structure.

[0056] In some embodiments of the present invention, the above installation through-hole is a counterbore hole. The above visual glass 1 is arranged at the end with a small aperture of the above installation through-hole, and the above visual window pressing plate 3 is arranged at the end with a large aperture of the above installation through-hole. The apertures of the above visual window pressing plate 3 and the above visual glass 1 are the same.

[0057] In the above embodiments, the installation through-hole is a countersunk hole. A countersunk hole is a hole with different diameters at both ends. Specifically, one end of the countersunk hole has a larger diameter and the other end has a smaller diameter. The end with the smaller diameter of the installation through-hole faces the inside of the reaction chamber, and the end with the larger diameter of the installation through-hole faces the outside of the reaction chamber. The diameter of the outside of the visual window pressing plate 3 is equal to the diameter of the outside of the visual glass 1, so that the visual glass 1 and the visual window pressing plate 3 are stably connected. It should be noted here that the same diameter of the visual glass 1 and the visual window pressing plate 3 is only one implementation manner in the embodiments of the present invention, and does not limit the specific structures of the visual glass 1 and the visual window pressing plate 3. In other embodiments, the visual window pressing plate 3 or / and the visual glass 1 can be of other sizes, as long as the connection between the two can be achieved, and no detailed description will be given here.

[0058] In some embodiments of the present invention, the above-mentioned primary gasket 5 is a graphite gasket.

[0059] In the above embodiments, the graphite gasket (expandable graphite (flexible graphite) is made from natural graphite through chemical treatment and high-temperature treatment at 1000 °C. This material provides excellent heat resistance and chemical resistance, and can well endow the gasket with characteristics of high elasticity and low ductility) is cut or stamped from a pure graphite plate or a metal (tooth plate, flat plate, mesh) reinforced graphite plate, and has many excellent sealing properties, such as: thermal stability, self-lubrication, corrosion resistance, non-aging, non-brittle, etc. It can be used stably for a long time under harsh working conditions and requires very little maintenance. The lining material can be selected from different gasket thin plates. The type can be selected as non-edge-wrapped, inner-edge-wrapped, outer-edge-wrapped, inner and outer-edge-wrapped. The graphite cutting gasket is punched or cut from a pure graphite plate. It has good corrosion resistance, high / low temperature resistance, good compression resilience and high strength. Various round and complex geometric gaskets are widely used in pipelines, valves, pumps, pressure vessels, heat exchangers, condensers, generators, air compressors, exhaust pipes, refrigerators, etc. The graphite gasket has the following characteristics: 1. The sealing performance of the flexible graphite gasket remains almost unchanged in the temperature range from extremely low temperature to 400 °C; 2. The flexible graphite gasket has excellent chemical resistance to almost all liquids (except strong oxidizing acids, etc.); 3. Due to very small cold deformation and ductility, over-tight installation has no effect on the flexible graphite gasket. It is particularly suitable in such a high-temperature and high-pressure environment.

[0060] In some embodiments of the present invention, the above-mentioned secondary gasket 6 is a packing ring. The inside of the above-mentioned secondary gasket 6 is connected to the outside of the above-mentioned visual window pressing plate 3, and the outside of the above-mentioned secondary gasket 6 is connected to the side wall of the above-mentioned installation through-hole.

[0061] In the above embodiments, the secondary gasket 6 is a packing ring, and this sealing ring is a graphite packing ring. This graphite packing ring has at least the following characteristics: 1. It is resistant to high temperatures and low temperatures. The service range in non-oxidizing media is degrees Celsius, and it can reach 400 °C in oxidizing media. It is corrosion-resistant and resistant to various corrosive media. However, when used in strongly oxidizing media, there are still certain limitations. The ultimate pressure for the use of the gasket is 1.33X10<59Mpa. Even in the case of severe temperature and pressure fluctuations, good sealing can be ensured; due to capillary action, asbestos gaskets often leak liquid media, while flexible graphite gaskets have good impermeability; the flange sealing surface does not require fine machining, and as long as the surface roughness reaches RA6.3mm, good sealing can be ensured; the gasket is soft, has good elastoplasticity, so the bolt pressing force is small. Just gently press the gasket to ensure good sealing, and the installation is relatively convenient; 7. It does not contaminate the sealing surface.

[0062] In some embodiments of the present invention, the above-mentioned window cover 2 and the above-mentioned visible window installation base 4 are detachably connected by bolts.

[0063] In the above embodiments, the connection method of the bolts can achieve the rapid installation or disassembly of the window cover 2 and the visible window installation base 4, and the connection method of the bolts makes the fixing effect of the window cover 2 better.

[0064] In some embodiments of the present invention, the above-mentioned window cover 2 and the above-mentioned visible window pressing plate 3 are detachably window-pressed by bolts.

[0065] In the above embodiments, the connection method of the bolts can achieve the rapid installation or disassembly of the window cover 2 and the visible window pressing plate 3, and the connection method of the bolts makes the fixing effect of the visible window pressing plate 3 better.

[0066] In some embodiments of the present invention, both between the above-mentioned window cover 2 and the above-mentioned visible window installation base 4 and between the above-mentioned window cover 2 and the above-mentioned visible window pressing plate 3 are connected by a plurality of bolts.

[0067] In the above embodiments, multiple groups of bolts between the above-mentioned window cover 2 and the above-mentioned visible window installation base 4 are evenly spaced along the circumferential direction of the window cover 2. Multiple groups of bolts between the above-mentioned window cover 2 and the above-mentioned visible window pressing plate 3 are evenly spaced along the circumferential direction of the window cover 2, and the calibers corresponding to the two circumferential bolt groups are different.

[0068] In some embodiments of the present invention, the above-mentioned window cover 2 is T-shaped. The bottom of the longitudinal part of the T-shaped window cover 2 extends into the above-mentioned installation through-hole and is connected to the above-mentioned visible window pressing plate 3. The caliber of the longitudinal part of the window cover 2 is equal to the caliber of the above-mentioned installation through-hole.

[0069] In the above embodiments, the bolt connections between the window cover plate 2 and the visual window mounting base 4 are arranged on the outer side of the transverse part of the T-shaped window cover plate 2, and the bolt connections between the window pressing on the window cover plate 2 and the visual window pressing plate 3 are arranged on the inner side of the T-shaped window cover plate 2 and penetrate through the longitudinal part of the T-shaped window cover plate 2.

[0070] In some embodiments of the present invention, visual through holes are provided in the middle parts of the above-mentioned visual window pressing plate 3 and the above-mentioned window cover plate 2.

[0071] In the above embodiments, due to the design of the visual through holes, relevant staff can observe the reaction situation in the reaction chamber through the visual through holes and then through the visual glass 1.

[0072] In some embodiments of the present invention, the above-mentioned visual glass 1 is quartz glass.

[0073] In the above embodiments, quartz glass is made by melting natural crystalline quartz (crystal or pure silica) or synthetic silane at high temperature. The molten product has excellent processing performance. Within a very high viscosity range, tubes and rods can be thermally processed like ordinary glass handicrafts, and can also be machined at high speed with grinding tools made of diamond or silicon carbide, so as to make various complex-shaped instruments and special products. Quartz glass has an extremely low coefficient of thermal expansion, high heat resistance, excellent chemical stability, excellent electrical insulation, low and stable ultrasonic delay performance, the best ultraviolet spectrum transmission performance, visible light and near-infrared spectrum transmission performance, and mechanical properties higher than ordinary glass.

[0074] In summary, the embodiments of the present invention provide a visual window multi-stage sealing device suitable for high temperature and high pressure, which has at least the following technical effects:

[0075] In the embodiments of the present application, when a high temperature and high pressure reaction is carried out in the reaction chamber, the air pressure in the reaction chamber exerts a certain force on the visual glass 1. The visual glass 1 exerts the above force on the visual window pressing plate 3, and the visual window pressing plate 3 exerts the above force on the window cover plate 2. The window cover plate 2 transmits the above force to the visual window mounting base 4 to achieve the function of bearing by the visual glass 1. In the above process, the design of the primary sealing gasket 5 achieves the primary seal of the visual window and has the advantage of preventing leakage. The design of the secondary sealing gasket 6 achieves the secondary seal of the visual window and further prevents the leakage of the visual window structure; the window cover plate 2 is connected to the above-mentioned visual window mounting base 4, so that the force of the internal air pressure is transmitted to the visual window mounting base 4 through the visual glass 1, the visual window pressing plate 3 and the window cover plate 2 to achieve the stable installation of the visual window. The design of the present invention has the advantages of good sealing performance and stable structure.

[0076] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multi - stage sealing device for a viewing window, characterized in that, it includes: A viewing window installation base body, which is the side wall of the observation chamber, and an installation through - hole is penetrated and opened on the viewing window installation base body; A viewing glass, which is arranged in the installation through - hole, A viewing window pressing plate, which is arranged in the installation through - hole, and the viewing window pressing plate presses on the outer side of the viewing glass; A primary sealing gasket, which is arranged between the viewing glass and the viewing window pressing plate; A secondary sealing gasket, which is annular, and the secondary sealing gasket is arranged between the installation through - hole and the viewing glass; A viewing window cover plate, which is arranged on the upper side of the viewing window pressing plate, and the viewing window cover plate presses against the viewing window installation base body; The viewing window cover plate is of an annular structure and has a T - shaped cross - section. The bottom of the longitudinal part of the T - shaped viewing window cover plate extends into the installation through - hole to press against the viewing window pressing plate. The diameter of the longitudinal part of the viewing window cover plate is equal to the diameter of the installation through - hole. Visible through - holes are opened in the middle of both the viewing window pressing plate and the viewing window cover plate.

2. A multi - stage sealing device for a viewing window according to claim 1, characterized in that, The installation through - hole is a countersunk hole. The viewing glass is arranged at the end with a small aperture of the installation through - hole, and the viewing window pressing plate is arranged at the end with a large aperture of the installation through - hole. The outer edge dimensions of the viewing window pressing plate and the viewing glass are the same.

3. A multi - stage sealing device for a viewing window according to claim 1, characterized in that, The primary sealing gasket is a graphite sealing gasket.

4. A multi - stage sealing device for a viewing window according to claim 3, characterized in that, The secondary sealing gasket is a packing ring. The inner side of the secondary sealing gasket is connected to the outer side of the viewing window pressing plate, and the outer side of the secondary sealing gasket is connected to the side wall of the installation through - hole.

5. A multi - stage sealing device for a viewing window according to claim 1, characterized in that, The viewing window cover plate and the viewing window installation base body are detachably pressed against each other by bolts.

6. A multi - stage sealing device for a viewing window according to claim 5, characterized in that, The viewing window cover plate and the viewing window pressing plate are detachably pressed against each other by bolts.

7. A multi - stage sealing device for a viewing window according to claim 6, characterized in that, Both between the viewing window cover plate and the viewing window installation base body and between the viewing window cover plate and the viewing window pressing plate are pressed against each other by a plurality of bolts.

8. A multi - stage sealing device for a viewing window according to claim 1, characterized in that, The viewing glass is quartz glass.

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