Fire seal and method of use

Abstract

The application discloses a fireproof sealing device and a use method thereof, and solves the technical problem of poor reliability of the existing fireproof sealing device when being in a fire environment for a long time. The fireproof sealing device comprises a mounting seat, the mounting seat is connected with a first sealing strip and a second sealing strip arranged side by side along a sealing direction, the first sealing strip is connected with an air bag, the air bag pushes the first sealing strip after being heated, an elastic unit in a compressed state is arranged between the second sealing strip and the mounting seat, a fusible tension unit for positioning the second sealing strip is arranged on the mounting seat, and the elastic unit pushes the second sealing strip after the fusible tension unit is fused. The application is reliable in hierarchical sealing and insurance: two-stage sealing is adopted, the first-stage sealing plays a high sealing effect and prevents gas leakage, the second-stage sealing adopts spring compensation and self-expansion double insurance, plays a role of heat insulation and supplementary sealing, and the sealing performance is reliable.

Description

Technical Field

[0001] This invention relates to the field of fireproof sealing technology, and in particular to a fireproof sealing device and its usage method. Background Technology

[0002] Among numerous tunnel disasters, tunnel explosions and fires pose the most severe hazards. Prolonged exposure to fire can lead to fatalities, property damage, and tunnel abandonment, causing irreparable damage to the tunnel project. Partitioned protective sealing devices installed inside or at the entrance of larger tunnels can effectively prevent the spread of explosive impacts, fire, and toxic gases. Because these protective devices need to be opened and closed, gaps must be left between the protective devices and the sealing ends. Sealing measures are required to contain high-temperature, high-pressure, and toxic fumes outside the entrance, meeting the reliable sealing requirements under prolonged high-temperature fire conditions.

[0003] Existing protective equipment seals generally suffer from poor high-temperature resistance, short endurance time, and limited functionality, making them unsuitable for sliding protective equipment and failing to meet the reliable sealing requirements of mobile protective equipment exposed to high temperatures and prolonged fire. For example, Chinese utility model patent CN209838196U, published on December 24, 2019, discloses a fire door with sealing elements at the door seams. While the fire door body has a fire-resistant sealing strip along its edge, providing some fire protection, this fire door is not only unsuitable for sliding protective equipment, but also suffers from a simple fire-resistant sealing strip structure, poor sealing reliability, and the need to flip the movable sleeve each time the door needs to be opened, which cannot be fixed after flipping, making operation cumbersome.

[0004] Chinese utility model patent CN 218542083 U, with an authorization announcement date of February 28, 2023, discloses a stainless steel insulated fireproof door, including a door frame and a stainless steel door leaf. The stainless steel door leaf has interconnected sealing airbags on its four sides, and the door frame has sealing grooves on its four sides. An extrusion assembly is provided on the side of the stainless steel door leaf connected to the hinge. The extrusion assembly includes a cavity, a telescopic column, and an extrusion plate. Several cavities are distributed inside the stainless steel door leaf. A sliding plate and a spring are slidably arranged in the cavity. A telescopic column is fixedly connected to one side of the sliding plate, and several telescopic columns are connected to the same extrusion plate.

[0005] During the closing process of the aforementioned stainless steel insulated fireproof door, the compression plate automatically compresses the corresponding sealing airbags, causing other sealing airbags to expand and fit tightly against the corresponding sealing grooves. This ensures the seal between the door frame and the door leaf, preventing high-temperature smoke generated during a fire from leaking through the gaps between the door leaf and the door frame, thus avoiding an increase in ambient temperature. However, this structure, which uses rotating compression airbags for sealing, is not suitable for sliding protective equipment and cannot achieve reliable sealing under prolonged high-temperature fire conditions.

[0006] Therefore, there is an urgent need to design a fireproof sealing device suitable for translational protective equipment. Summary of the Invention

[0007] To address the shortcomings in the aforementioned background technology, this invention proposes a fireproof sealing device and its usage method, which solves the technical problem of poor reliability of existing fireproof sealing devices when exposed to fire for extended periods.

[0008] The technical solution of this application is as follows:

[0009] A fireproof sealing device includes a mounting base, on which a first sealing strip and a second sealing strip are connected in parallel along the sealing direction; the first sealing strip is connected to an air bladder, which pushes the first sealing strip when heated; an elastic unit in a compressed state is provided between the second sealing strip and the mounting base, and a fusible tensioning unit is provided on the mounting base to position the second sealing strip; when the fusible tensioning unit melts, the elastic unit pushes the second sealing strip.

[0010] This technical solution provides a dual sealing structure mainly composed of a first sealing strip and a second sealing strip. At the same time, both the first and second sealing strips have adaptive functions and can have different response modes under different working conditions, thereby achieving reliable sealing performance and enabling reliable sealing for a long time in fire-affected environments. In addition, the first and second sealing strips, which are arranged side by side on the mounting base, can also be used for sealing of translational protective equipment. Specifically, under normal opening and closing conditions of the sliding or rotating protective equipment, the airbag is in a compressed state, and the first sealing strip is hidden inside the mounting base. The fusible tensioning unit is intact, and the second sealing strip is also hidden inside the mounting base. This does not affect the normal opening and closing of the sliding or rotating protective equipment, nor does it cause wear to the first and second sealing strips. In the event of a fire requiring sealing, the first sealing strip and the airbag expand due to heat, pushing the first sealing strip out of the mounting base to achieve the first seal. As the ambient temperature rises, the second sealing strip expands and protrudes from the mounting base, achieving the second seal. As the ambient temperature continues to rise, the fusible tensioning unit melts, and the elastic unit further pushes out the second sealing strip, achieving a more reliable seal.

[0011] Furthermore, the airbag is an inflatable airbag.

[0012] Based on the above technical solutions, this technical solution provides a preferred embodiment of the airbag, which sets the airbag to an inflatable and deflated structure, which facilitates rapid response and flexible operation. The inflation and deflation operation can realize the rapid switching of the first sealing strip between sealed and non-sealed conditions, and can also work together with the expansion and heating of the airbag itself to achieve a more reliable sealing effect.

[0013] Furthermore, the airbag and the first sealing strip are connected to each other through a mating tenon and a mortise hole.

[0014] Based on the above technical solutions, this technical solution provides a preferred assembly structure for the airbag and the first sealing strip. The tenon and mortise connection not only provides a reliable connection but also saves installation space. Specifically, the protruding tenon can be located at the top of the airbag, and the recessed tenon can be located at the bottom of the first sealing strip; or the protruding tenon can be located at the bottom of the first sealing strip, and the recessed tenon can be located at the top of the airbag; or both the top of the airbag and the bottom of the first sealing strip are provided with the protruding tenon and the recessed tenon. As for the shape of the protruding tenon and the recessed tenon, there are various implementation methods, such as dovetail, spherical, or T-shaped. Regardless of the shape or location of the protruding tenon and the recessed tenon, they are preferably integrally formed with the airbag or the first sealing strip.

[0015] Furthermore, the elastic unit includes a spring that supports the second sealing strip.

[0016] Based on the above technical solution, this technical solution provides a preferred embodiment of the elastic unit. In addition to using a spring, an airbag structure can also be used, which can push the second sealing strip outward when the fusible tensioning unit melts.

[0017] Furthermore, the spring is a helical spring, leaf spring, spiral spring, butterfly spring, air spring, or rubber spring.

[0018] Based on the above technical solutions, this technical solution provides a preferred embodiment of the spring, which can be freely selected according to factors such as the installation space of the elastic unit, the application environment of the entire protective sealing device, usage costs, and ease of maintenance. A helical spring is preferred because it is not only simple in structure but also easy to install and maintain.

[0019] Furthermore, when the spring is a helical spring, one end of the helical spring is abutted against the second sealing strip through a top seat. A hollow support leg is provided on the side of the top seat away from the second sealing strip. A guide post is provided on the mounting base to be inserted and engaged with the hollow support leg. The helical spring is located between the outer wall of the guide post and the inner wall of the hollow support leg.

[0020] Based on the above technical solutions, this technical solution provides a preferred embodiment of the elastic unit. The top seat ensures the stability and uniformity of the helical spring's support for the second sealing strip. The insertion and connection of the guide post and the hollow support leg provides axial guidance for the helical spring between the guide post and the hollow support leg, further improving the reliability of pressing the second sealing strip. Besides the embodiment where the guide post is mounted on the mounting base and the hollow support leg is mounted on the top seat, an inverted structure can also be used, where the guide post is mounted on the top seat and the hollow support leg is mounted on the mounting base. Furthermore, the guiding structure is not limited to mutually cooperating guide posts and hollow support legs; it can also employ mutually cooperating guide plates, mutually cooperating guide grooves, or mutually cooperating guide plates and guide grooves, etc.

[0021] Furthermore, the fusible tensioning unit includes a flexible cable tie connecting the second sealing strip and the mounting base.

[0022] Based on the above technical solutions, this technical solution provides a preferred implementation of the fusible tensioning unit, which uses flexible cable ties to facilitate installation and maintenance, and to facilitate melting in a fire environment, thereby quickly achieving the sealing response of the second sealing strip.

[0023] Furthermore, the two ends of the flexible cable tie are respectively connected to the mounting base, and the middle part of the flexible cable tie is pressed against the top of the second sealing strip, or passes through the second sealing strip, or is pressed against the top of the elastic unit.

[0024] Based on the above technical solution, this technical solution provides a preferred implementation method for flexible cable ties. There are multiple options for the assembly form of the flexible cable tie positioning the second sealing strip. It can be connected to any position of the second sealing strip or directly connected to the elastic unit. The specific connection method can be selected according to the actual situation.

[0025] Furthermore, the mounting base includes a connecting plate, and a heat dissipation plate, a partition plate and an outer side plate are spaced apart on the outer side of the connecting plate. The first sealing strip and the airbag are disposed in a first groove between the heat dissipation plate and the partition plate, and the second sealing strip and the elastic unit are disposed in a second groove between the partition plate and the outer side plate.

[0026] Based on the above technical solution, this technical solution provides a preferred embodiment of the mounting base. The mounting base serves as the foundation for installing and fixing the fireproof sealing device. It is configured with a double-groove structure through a heat dissipation plate, a partition plate, and an outer side plate. The first groove and the second groove are used to accommodate the first sealing strip and the second sealing strip, respectively. Preferably, the heat dissipation plate is placed on the innermost side to facilitate heat dissipation, and the second sealing strip is placed in the second groove near the outer side to facilitate the fusible tensioning unit to melt and break under fire.

[0027] Furthermore, a heat insulation groove is provided within the first groove, and the first sealing strip and the airbag are disposed within the first groove through the heat insulation groove. The heat insulation groove is used to insulate against high temperatures and protect the airbag.

[0028] Furthermore, the heat sink has a hollow structure, which improves heat dissipation performance and prevents the temperature at the airbag from becoming too high. A second heat insulation plate is provided on the inner side of the connecting plate to further isolate heat transfer.

[0029] Furthermore, an air vent is provided through the heat insulation groove, the connecting plate, and the second heat insulation plate, which is connected to the airbag to facilitate the inflation and deflation of the airbag.

[0030] Furthermore, a first heat insulation plate and a fixing plate are sequentially connected to the outer side of the outer side plate, and the fusible tensioning unit includes a flexible cable tie connected between the fixing plate and the partition plate. The flexible cable tie is pressed against the top of the second sealing strip, passes through the second sealing strip, or is pressed against the top of the elastic unit.

[0031] A method of using a fireproof sealing device involves connecting the fireproof sealing device to a rotating protective device or a protective device. The modularly configured fireproof sealing device forms an annular seal around a doorway of the substrate. When the protective device is in normal operating condition, the first sealing strip and the second sealing strip are retracted into the mounting base. When in fire sealing condition, the airbag expands and pushes the first sealing strip to seal against the substrate. When the fusible tensioning unit melts, the elastic unit pushes the second sealing strip to seal against the substrate.

[0032] This invention provides a fireproof sealing device and its usage method, solving the technical problems of limited applicability and susceptibility to interference in existing fireproof sealing devices. Compared with the prior art, this invention has the following advantages:

[0033] 1. Modular design for easy maintenance: The sealing device adopts an assembled modular design, which can be installed in sections on the protective equipment, and maintenance does not require complete removal.

[0034] 2. Staged sealing for reliable protection: The system employs a two-stage sealing mechanism. The first stage provides a high level of sealing to prevent gas leakage, while the second stage utilizes spring compensation and self-expansion for double protection, serving as both heat insulation and supplementary sealing, ensuring reliable sealing performance.

[0035] 3. Multiple layers of insulation for effective protection: The first insulation board, the second insulation board, and the second sealing strip form the first insulation wall, which isolates most of the temperature. The insulation groove and the first sealing strip form the second insulation wall, which provides reliable protection for the airbag.

[0036] 4. Can be opened and closed, easy to restore: The first-level seal adopts a sealing crown and airbag separation combination sealing structure. The airbag has abundant air resources and can be opened and closed, which is convenient for daily inspection and restoration.

[0037] 5. On-demand ejection, reducing costs: The second-stage seal adopts a reliable passive mechanical elastic ejection structure to ensure structural reliability. In areas not burned by the flame, the tensioning unit can be melted, thereby reducing later maintenance costs. Attached Figure Description

[0038] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the structural components of a fireproof sealing device;

[0040] Figure 2 This is an isometric drawing of a fireproof sealing device;

[0041] Figure 3 An isometric view of the mounting base in a fireproof sealing device;

[0042] Figure 4 A schematic diagram illustrating the application status of a fireproof sealing device;

[0043] Figure 5 for Figure 4 A schematic diagram of the working state of the fireproof sealing device.

[0044] Figure 6 for Figure 4 Schematic diagram of the working state of the fireproof sealing device (II);

[0045] Figure 7 A schematic diagram illustrating the expanded applications of fire-resistant sealing devices.

[0046] Explanation of icon numbers:

[0047] 1 Mounting base, 101 Connecting plate, 102 Heat dissipation plate, 103 Middle partition plate, 104 Outer plate, 2 Heat insulation groove, 3 Airbag, 4 First sealing strip, 5 Guide column, 6 Elastic unit, 7 Top seat, 8 Second sealing strip, 9 First heat insulation plate, 10 Fixing plate, 11 Fusible tensioning unit, 12 Second heat insulation plate, 13 Protective equipment, 14 Base. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the core concept of the present invention and the following embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] A fireproof sealing device, such as Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, it includes a mounting base 1, and the mounting base 1 is connected with a first sealing strip 4 and a second sealing strip 8 arranged in parallel along the sealing direction, forming a double sealing structure.

[0050] The first sealing strip 4 is connected to an air bladder 3. When the air bladder 3 is inflated or heated, it can push the first sealing strip 4 out of the mounting base 1. An elastic unit 6 in a compressed state is provided between the second sealing strip 8 and the mounting base 1. A fusible tensioning unit 11 is provided on the mounting base 1 to position the second sealing strip 8. When the fusible tensioning unit 11 melts, the elastic unit 6 pushes the second sealing strip 8.

[0051] This technical solution provides a dual sealing structure mainly composed of a first sealing strip 4 and a second sealing strip 8. At the same time, both the first sealing strip 4 and the second sealing strip 8 have adaptive functions and can have different response modes under different working conditions, thereby achieving reliable sealing performance and being able to reliably seal in a fire environment for a long time. In addition, the first sealing strip 4 and the second sealing strip 8, which are arranged side by side on the mounting base 1, can also be used for sealing of translational protective equipment.

[0052] Specifically, when the sliding or rotating protective equipment is in normal operation, the airbag 3 is in a compressed state, and the first sealing strip 4 is hidden inside the mounting base 1. The fusible tensioning unit 11 is in good condition, and the second sealing strip 8 is also hidden inside the mounting base 1. This does not affect the normal opening and closing of the sliding or rotating protective equipment, nor does it cause wear to the first sealing strip 4 and the second sealing strip 8.

[0053] In the case of fire requiring sealing, the first sealing strip 4 and the airbag 3 expand when heated, which can push the first sealing strip 4 out of the mounting seat 1, thereby achieving the first seal. As the ambient temperature rises, the second sealing strip 8 expands and protrudes out of the mounting seat 1, thereby achieving the second seal. As the ambient temperature continues to rise, the fusible tensioning unit 11 is fused, and the elastic unit 6 pushes the second sealing strip 8 out further, achieving a more reliable seal.

[0054] Based on the above embodiments, this embodiment provides a preferred implementation of the airbag 3, wherein the airbag 3 is an inflatable airbag. Setting the airbag 3 as an inflatable structure facilitates rapid response and flexible operation. The inflation and deflation operation allows the first sealing strip 4 to quickly switch between sealed and non-sealed conditions, and also allows it to work in conjunction with the expansion and heating of the airbag 3 itself, thereby achieving a more reliable sealing effect.

[0055] Based on the above embodiments, this embodiment provides a preferred assembly structure for the airbag 3 and the first sealing strip 4, such as... Figure 1 , Figure 5 , Figure 6 As shown, the airbag 3 and the first sealing strip 4 are connected to each other by a mating tenon and a mortise hole.

[0056] The mortise and tenon joint not only provides a reliable connection but also saves installation space. Specifically, the tenon can be located at the top of the airbag 3, and the tenon hole can be located at the bottom of the first sealing strip 4; or the tenon can be located at the bottom of the first sealing strip 4, and the tenon hole can be located at the top of the airbag 3; or the tenon and tenon hole can be located at both the top of the airbag 3 and the bottom of the first sealing strip 4. The shape of the tenon and tenon hole can also be varied, for example, it can be dovetail-shaped, spherical, or T-shaped. Regardless of the shape or location of the tenon and tenon hole, they are preferably integrally formed with the airbag 3 or the first sealing strip 4.

[0057] Based on the above embodiments, this embodiment provides a preferred implementation of the elastic unit 6, such as... Figure 1 As shown, the elastic unit 6 includes a spring that supports the second sealing strip 8. Besides using a spring, an airbag structure can also be used, which allows the second sealing strip 8 to be pushed outward when the fusible tensioning unit 11 melts.

[0058] Based on the above embodiments, this embodiment provides a preferred implementation of the spring, which is a helical spring, leaf spring, spiral spring, butterfly spring, air spring, or rubber spring. The choice can be made freely based on factors such as the installation space of the elastic unit 6, the application environment of the entire protective sealing device, usage costs, and ease of maintenance. A helical spring is preferred because it is not only simple in structure but also easy to install and maintain.

[0059] Based on the above embodiments, this embodiment provides a preferred implementation of the elastic unit 6. When the spring is a helical spring, one end of the helical spring is abutted against the second sealing strip 8 through the top seat 7. A hollow support leg is provided on the side of the top seat 7 away from the second sealing strip 8. A guide post 5 is provided on the mounting base 1 to be inserted and cooperated with the hollow support leg. The helical spring is located between the outer wall of the guide post 5 and the inner wall of the hollow support leg.

[0060] The top seat 7 ensures the stability and uniformity of the helical spring's support for the second sealing strip 8. The insertion and connection of the guide post 5 and the hollow support leg provides axial guidance for the helical spring between them, further improving the reliability of the pressure on the second sealing strip 8. Besides the implementation where the guide post 5 is mounted on the mounting base 1 and the hollow support leg is mounted on the top seat 7, an inverted structure can also be used, where the guide post 5 is mounted on the top seat 7 and the hollow support leg is mounted on the mounting base 1. Furthermore, the guiding structure is not limited to the mutually cooperating guide post 5 and hollow support leg; it can also employ mutually cooperating guide plates, mutually cooperating guide grooves, or mutually cooperating guide plates and guide grooves, etc.

[0061] Based on the above embodiments, this embodiment provides a preferred implementation of the fusible tensioning unit 11, such as... Figure 5 and Figure 6 As shown, the fusible tensioning unit 11 includes a flexible cable tie connecting the second sealing strip 8 and the mounting base 1. The flexible cable tie facilitates installation and maintenance, and also allows for rapid sealing of the second sealing strip 8 in a fire-prone environment.

[0062] Based on the above embodiments, this embodiment provides a preferred implementation of the flexible cable tie, wherein the two ends of the flexible cable tie are respectively connected to the mounting base 1, and the middle part of the flexible cable tie is pressed against the top of the second sealing strip 8, or passes through the second sealing strip 8, or is pressed against the top of the elastic unit 6.

[0063] The flexible cable tie positioning second sealing strip 8 has multiple assembly options. It can be connected to any position of the second sealing strip 8 or directly connected to the elastic unit 6. The specific connection method can be selected according to the actual situation.

[0064] Based on the above embodiments, this embodiment provides a preferred implementation of the mounting base 1, such as... Figure 3As shown, the mounting base 1 includes a connecting plate 101. A heat dissipation plate 102, a partition plate 103 and an outer side plate 104 are spaced apart on the outer side of the connecting plate 101. The first sealing strip 4 and the airbag 3 are disposed in the first groove between the heat dissipation plate 102 and the partition plate 103. The second sealing strip 8 and the elastic unit 6 are disposed in the second groove between the partition plate 103 and the outer side plate 104.

[0065] The mounting base 1 serves as the foundation for installing and fixing the fireproof sealing device. It is configured with a double-groove structure through the heat dissipation plate 102, the partition plate 103, and the outer plate 104. The first groove and the second groove are used to accommodate the first sealing strip 4 and the second sealing strip 8, respectively. Preferably, the heat dissipation plate 102 is placed on the innermost side to facilitate heat dissipation, and the second sealing strip 8 is placed in the second groove near the outer side to facilitate the fusible tensioning unit 11 to melt and break under fire.

[0066] Preferably, such as Figure 1 and Figure 3 As shown, a heat insulation groove 2 is provided in the first groove, and the first sealing strip 4 and the airbag 3 are disposed in the first groove through the heat insulation groove 2. The heat insulation groove 2 is used to insulate against high temperature and protect the airbag 3.

[0067] Preferably, the heat dissipation plate 102 has a hollow structure, which can improve heat dissipation performance and prevent the temperature at the airbag 3 from becoming too high. A second heat insulation plate 12 is provided on the inner side of the connecting plate 101 to further isolate heat transfer.

[0068] Preferably, an air vent hole connected to the airbag 3 is provided through the heat insulation groove 2, the connecting plate 101, and the second heat insulation plate 12 to facilitate the inflation and deflation of the airbag 3.

[0069] Preferably, the outer side of the outer side plate 104 is sequentially connected to a first heat insulation plate 9 and a fixing plate 10. The fusible tensioning unit 11 includes a flexible cable tie connected between the fixing plate 10 and the partition plate 103. The flexible cable tie is pressed against the top of the second sealing strip 8 or passes through the second sealing strip 8 or is pressed against the top of the elastic unit 6.

[0070] A fireproof sealing device, such as Figures 1-3 As shown, it mainly includes: mounting base 1, heat insulation groove 2, airbag 3, first sealing strip 4, elastic unit 6, top seat 7, second sealing strip 8, first heat insulation plate 9, fusible tensioning unit 11, second heat insulation plate 12, etc.

[0071] Mounting base 1: It consists of a connecting plate 101, a heat dissipation plate 102, a partition plate 103, and an outer plate 104. The heat dissipation plate 102, the middle partition plate 103, and the outer plate 104 are vertically fixed on the connecting plate 101, presenting a double U-shaped structure. The connecting plate 101 is provided with air vent holes. The heat dissipation plate 102 is located on the innermost side, and the middle is a hollow structure to facilitate heat dissipation. The partition plate 103 is located in the middle, and the outer plate 104 is located on the outermost side. Mounting base 1 serves as the base for installing and fixing the fireproof sealing device.

[0072] Insulation groove 2: It has a U-shaped structure and is fixed between heat dissipation plate 102 and partition plate 103 to insulate against high temperature and protect airbag 3;

[0073] Airbag 3: It has a hollow structure with a protruding tenon at the top and a fixing seat at the bottom. It also has a vent hole at the bottom. The material can be EPDM rubber, which has good elasticity and wear resistance. Airbag 3 is placed in the heat insulation groove 2. The bottom fixing seat is detachably fixed to the bottom of the heat insulation groove 2.

[0074] First sealing strip 4: It has a tenon hole at the bottom, and the temperature resistance is not lower than the temperature resistance of the airbag 3. It can be made of silicone rubber, which has good high temperature stability. It is placed in the heat insulation groove 2 and is connected by the tenon hole and the protruding tenon of the airbag 3. The two sides of the first sealing strip 4 are gap / contact with the two sides of the heat insulation groove 2, and can move up and down in the heat insulation groove 2 as the airbag 3 inflates or retracts.

[0075] Guide column 5: Fixed on the connecting plate 101 of the mounting base 1, located between the middle partition plate 103 and the outer side plate 104, providing guidance for the elastic unit 6;

[0076] Top seat 7: π-shaped, with hollow support legs installed under the top surface. Top seat 7 is placed between partition plate 103 and outer side plate 104. The hollow support legs are movably connected to guide column 5.

[0077] Elastic unit 6: can be a spring, placed between the guide post 5 and the empty support leg of the top seat, with its inner wall sliding / clear clearance fit with the outer wall of the guide post 5, one end contacting and connecting with the connecting plate 101, and the other end pressing and fitting with the top surface of the top seat 7;

[0078] The second sealing strip 8 is a high-temperature fireproof sealing strip, preferably expandable, placed between the partition 103 and the outer side plate 104, with its bottom pressed and connected to the top seat 7, and can pop out as the elastic unit 6 extends;

[0079] First heat insulation plate 9: fixed to the side of the outer panel 104, which can insulate most of the external heat;

[0080] Fixed plate 10: Fixed to the outside of the first heat insulation plate 9, serving as a fixed support plate for the fusible tensioning unit 11;

[0081] The fusible tensioning unit 11 can be a cable tie, with one end fixed to the partition plate 103, the middle part pressed and contacting the second sealing strip 8, and the other end fixed to the fixing plate 10, so as to realize the pressed and retracted state of the second sealing strip 8. Multiple cable ties can be arranged according to actual needs.

[0082] Second heat insulation plate 12: fixed to the bottom of connecting plate 101, it can insulate the remaining heat from the outside.

[0083] A method of using a fireproof sealing device, such as Figures 1-6 As shown, the fireproof sealing device is connected to the rotating protective equipment or the protective equipment 13. The modularly configured fireproof sealing device forms an annular seal around the doorway of the base 14. When the protective equipment 13 is in normal operating condition, the first sealing strip 4 and the second sealing strip 8 are retracted into the mounting base. When in fire sealing condition, the airbag 3 expands and pushes the first sealing strip 4 to seal with the base 14. When the fusible tensioning unit 11 melts, the elastic unit 6 pushes the second sealing strip 8 to seal with the base 14.

[0084] The specific working principle is as follows:

[0085] (1) Normal start-up condition:

[0086] like Figure 4 , Figure 2 As shown, the fireproof sealing device is a modular design, with multiple fireproof sealing devices arranged around the inner periphery of the protective equipment 13. Under normal circumstances, the air inside the airbag 3 is evacuated, the airbag 3 is in a deflated state, the first sealing strip 4 retracts into the heat insulation groove 2, the elastic unit 6 is compressed under the natural tension of the fusible tensioning unit 11, and the second sealing strip 8 retracts into the mounting base 1. Neither the first sealing strip 4 nor the second sealing strip 8 protrudes from the inner surface of the protective equipment, and does not affect the translational opening of the protective equipment 13 relative to the opening end face of the base 14.

[0087] (2) Ignition sealing condition:

[0088] like Figures 5-6As shown, in an emergency, the mouth protection device 13 is closed, and the fireproof sealing device installed on the contact surface of the mouth protection device 13 is activated. ① The airbag 3 inflates and pushes out the first sealing strip 4. The end face of the first sealing strip 4 contacts the mouth end face of the base 14 to form a sealed space, isolating the generated high-temperature and high-pressure toxic fumes; ② If the temperature at the sealing strip exceeds the preset temperature due to combustion, the fusible tensioning unit 11 at the overheated point is melted; ③ The second sealing strip 8 automatically pops out under the action of the elastic unit 6. The end face of the second sealing strip 8 presses tightly against the mouth end face of the base 14, controlling the fumes temperature within the preset temperature and protecting the safety of the inflatable seal; ④ The first sealing strip 8 expands when exposed to fire, filling micro-gaps and providing a more secure heat insulation effect; ⑤ The first heat insulation plate 9 insulates most of the temperature; ⑥ The second heat insulation plate 12 insulates the remaining temperature; ⑦ The heat insulation groove 2 further insulates the high temperature, the heat dissipation plate 102 dissipates heat, and the temperature of the airbag 3 is controlled below the predetermined temperature.

[0089] Additionally, depending on actual needs, if there are no fire protection requirements, the elastic unit 6, top seat 7, second sealing strip 8, first heat insulation board 9, fusible tensioning unit 11, second heat insulation board 12, etc., can be removed, leaving the remaining components as follows: Figure 7 The structure shown is for the proper sealing of mobile protective equipment with fixed gaps.

[0090] All aspects not detailed in this invention are conventional technical means known to those skilled in the art.

[0091] The above content shows and describes the basic principles, main features, and beneficial effects of the present invention. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A fireproof sealing device, comprising a mounting base (1), characterized in that: The mounting base (1) is connected with a first sealing strip (4) and a second sealing strip (8) arranged in parallel along the sealing direction; the first sealing strip (4) is connected to an airbag (3), and the airbag (3) pushes the first sealing strip (4) after being inflated or heated; an elastic unit (6) in a compressed state is provided between the second sealing strip (8) and the mounting base (1), and a fusible tensioning unit (11) for positioning the second sealing strip (8) is provided on the mounting base (1). When the fusible tensioning unit (11) melts, the elastic unit (6) pushes the second sealing strip (8); The mounting base (1) includes a connecting plate (101). A heat dissipation plate (102), a partition plate (103) and an outer side plate (104) are spaced apart on the outer side of the connecting plate (101). The first sealing strip (4) and the airbag (3) are disposed in the first groove between the heat dissipation plate (102) and the partition plate (103). The second sealing strip (8) and the elastic unit (6) are disposed in the second groove between the partition plate (103) and the outer side plate (104). A heat insulation groove (2) is provided in the first groove, and the first sealing strip (4) and airbag (3) are provided in the first groove through the heat insulation groove (2); The heat sink (102) has a hollow structure, and the inner side of the connecting plate (101) is provided with a second heat insulation plate (12). The outer side plate (104) is connected in sequence with a first heat insulation plate (9) and a fixing plate (10). The fusible tensioning unit (11) includes a flexible cable tie connected between the fixing plate (10) and the partition plate (103). The flexible cable tie is pressed against the top of the second sealing strip (8) or passes through the second sealing strip (8) or is pressed against the top of the elastic unit (6).

2. The fireproof sealing device according to claim 1, characterized in that: The airbag (3) is an inflatable airbag.

3. The fireproof sealing device according to claim 2, characterized in that: The airbag (3) and the first sealing strip (4) are connected to each other by a mating tenon and a mortise hole.

4. The fireproof sealing device according to any one of claims 1-3, characterized in that: The elastic unit (6) includes a spring that supports the second sealing strip (8).

5. The fireproof sealing device according to claim 4, characterized in that: The spring is a helical spring, leaf spring, spiral spring, butterfly spring, air spring, or rubber spring.

6. The fireproof sealing device according to claim 5, characterized in that: When the spring is a helical spring, one end of the helical spring is abutted against the second sealing strip (8) through the top seat (7). The side of the top seat (7) facing away from the second sealing strip (8) is provided with a hollow support leg. The mounting base (1) is provided with a guide post (5) that is inserted and matched with the hollow support leg. The helical spring is located between the outer wall of the guide post (5) and the inner wall of the hollow support leg.

7. The fireproof sealing device according to any one of claims 1-3 and 5-6, characterized in that: The fusible tensioning unit (11) includes a flexible cable tie connecting the second sealing strip (8) and the mounting base (1).

8. The fireproof sealing device according to claim 7, characterized in that: The two ends of the flexible cable tie are respectively connected to the mounting base (1), and the middle part of the flexible cable tie is pressed against the top of the second sealing strip (8), or passes through the second sealing strip (8), or is pressed against the top of the elastic unit (6).

9. The fireproof sealing device according to any one of claims 1-3, 5-6, and 8, characterized in that: An air vent is provided through the heat insulation groove (2), the connecting plate (101), and the second heat insulation plate (12) and is connected to the airbag (3).

10. A method of using a fireproof sealing device, characterized in that: The fireproof sealing device according to any one of claims 1-9 is connected to the protective equipment (13). The modularly configured fireproof sealing device forms an annular seal around the doorway of the base (14). When the protective equipment (13) is in normal operating condition, the first sealing strip (4) and the second sealing strip (8) are retracted in the mounting seat. When in fire sealing condition, the airbag (3) expands and pushes the first sealing strip (4) to seal with the base (14). When the fusible tensioning unit (11) melts, the elastic unit (6) pushes the second sealing strip (8) to seal with the base (14).

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