Sheet continuous quenching furnace outlet end sealing device and quenching furnace

Abstract

The application discloses a thin plate continuous quenching furnace outlet end sealing device and a quenching furnace, and belongs to the technical field of strip steel quenching equipment. The thin plate continuous quenching furnace outlet end sealing device comprises a heat insulation support, a heat insulation base, a sealing plate, a moving mechanism, a suction assembly and a sealing mechanism. The heat insulation support and the heat insulation base are vertically arranged opposite to each other, the sealing plate is vertically movably arranged in the heat insulation support, the moving mechanism is connected with the sealing plate to drive the sealing plate to move and adjust the distance between the bottom edge of the sealing plate and the heat insulation base, and the sealing mechanism is sealed between the heat insulation support and the heat insulation base. The suction assembly is communicated with the inner cavity of the sealing mechanism to guide the hot air flowing out of the quenching furnace to be collected and constrained in the inner cavity of the sealing mechanism and then be concentratedly sucked and discharged. The thin plate continuous quenching furnace outlet end sealing device and the quenching furnace provided by the application can improve the heat insulation capacity of the quenching furnace and reduce the influence of thermal radiation on the rear-end equipment.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of strip steel quenching equipment, and particularly relates to a sealing device for an outlet end of a thin plate continuous quenching furnace and the quenching furnace. BACKGROUND

[0002] A thin plate continuous processing production line mainly comprises a quenching furnace and a quenching machine. Continuous strip steel is heated to 900 degrees in the quenching furnace and quickly enters the quenching machine from the outlet of the quenching furnace for heat treatment. In order to avoid excessive temperature drop affecting the quenching performance, the quenching furnace and the quenching machine are installed in a compact structure, the distance between the outlet of the quenching furnace and the inlet of the quenching machine is only 500 mm, and the outlet of the quenching furnace is not provided with a furnace door. Thus, a large amount of heat is dissipated from the outlet during the heating process in the quenching furnace, and the quenching machine is baked for a long time, so that the temperature of the parts of the quenching machine close to the quenching furnace can reach above 460 degrees, which seriously affects the working quality and leads to an undesirable equipment precision, which is not conducive to the normal work of the production line unit.

[0003] In order to reduce the adverse effects of hot air from the quenching furnace on the quenching machine, a sealing roller is usually arranged at the outlet end of the quenching furnace to clamp the steel strip to form a line contact seal, so as to reduce heat dissipation. However, the sealing state of the sealing roller is unstable and is greatly affected by the plate shape, the heat insulation effect is not ideal, and it is not suitable for hot-rolled strip steel above 3 mm. SUMMARY

[0004] The application provides a sealing device for an outlet end of a thin plate continuous quenching furnace and the quenching furnace, which aims to at least solve the technical problem of insufficient heat insulation capacity of the quenching furnace outlet and easy baking affecting subsequent equipment.

[0005] In one aspect of the application, a sealing device for an outlet end of a thin plate continuous quenching furnace is provided, which comprises a heat insulation support, a heat insulation base, a sealing plate, a moving mechanism, a suction assembly and a sealing mechanism.

[0006] The heat insulation support and the heat insulation base are vertically arranged opposite to each other, the sealing plate is vertically movably arranged in the heat insulation support, and the moving mechanism is connected with the sealing plate to drive the sealing plate to move and adjust the distance between the bottom edge of the sealing plate and the heat insulation base.

[0007] The sealing mechanism is sealed on one side port of the gap between the heat insulation support and the heat insulation base, and the suction assembly is in communication with the inner cavity of the sealing mechanism to guide the hot air flowing out of the quenching furnace to be collected and constrained in the inner cavity of the sealing mechanism, and then to be concentrated and sucked out.

[0008] In some embodiments, a sealing groove is formed in the top of the heat insulation support, and a vertical hole is formed in the groove bottom of the sealing groove.

[0009] The sealing plate includes a first plate and a second plate. The first plate is disposed in the sealing groove and connected to the moving mechanism, with the plate surface of the first plate facing the bottom of the sealing groove. The second plate is vertically disposed in the vertical hole, with the top edge of the second plate connected to the bottom surface of the first plate to form a tortuous gap between the sealing plate and the heat insulation bracket.

[0010] In some embodiments, the thermal insulation support includes a frame, a thermal insulation castable base, and a sealing cap;

[0011] The heat-insulating castable base is filled and formed within the frame, and the sealing groove and the vertical hole are both formed on the heat-insulating castable base;

[0012] The sealing cap is connected to the base of the heat-insulating castable, and the sealing cap blocks and seals the sealing groove.

[0013] In some embodiments, the moving mechanism includes: a winch, a cable, a pulley, and a connecting rod;

[0014] The winch is connected to the connecting rod via a cable wound around the pulley. The connecting rod passes through a through hole in the sealing cover and is connected to the first plate, so that the second plate can be raised or lowered by the winch.

[0015] In some embodiments, the heat insulation bracket further includes a guide sealing cylinder disposed on the sealing cover, and the connecting rod is vertically movable within the guide sealing cylinder.

[0016] In some embodiments, the sealing device at the outlet end of the thin plate continuous quenching furnace further includes a sealing element connected to the bottom end of the second plate, and the sealing element has a sealing surface facing the heat insulation base.

[0017] In some embodiments, the seal extends to cover the surface of the second plate, and the bottom of the sealing groove is provided with a ceramic fiber blanket opposite to the first plate.

[0018] In some embodiments, the enclosure assembly includes a barrier and a sealing curtain;

[0019] The sealing cover is connected to the heat insulation bracket, and the sealing curtain is vertically arranged inside the sealing cover to seal the port side of the gap between the heat insulation bracket and the heat insulation base.

[0020] In some embodiments, the heat insulation base includes a heat-resistant material block, the upper part of which has a groove adapted to the shape of the quenching furnace roller conveyor, and the size of the groove is larger than the size of the quenching furnace roller conveyor, so as to maintain the rotation gap of the quenching furnace roller conveyor when the heat-resistant material block passes through and seals the gap of the quenching furnace roller conveyor.

[0021] Another aspect of this application provides a quenching furnace, characterized in that it includes a sealing device at the outlet end of a thin-plate continuous quenching furnace as described in any one of claims 1 to 9.

[0022] The heat insulation bracket is connected to the furnace body frame of the quenching furnace and is located above the steel outlet of the quenching furnace.

[0023] The heat insulation base is located below the roller conveyor of the quenching furnace, sealing off the gap below the roller conveyor of the quenching furnace.

[0024] The embodiments of this application have at least the following beneficial effects:

[0025] The thin-plate continuous quenching furnace outlet sealing device and quenching furnace provided in this application embodiment form a sealing foundation by setting up a vertically arranged heat insulation support and heat insulation base to seal the area above the quenching furnace outlet and the area below the quenching furnace roller conveyor, respectively, blocking hot air. A sealing plate that can move vertically up and down is set on the heat insulation support, so that it can move up and down under the drive of the moving mechanism to adjust the distance between the sealing plate and the heat insulation base below. Thus, when the steel strip passes through, the height can be adjusted according to the specifications of the steel strip to control the gap between the sealing plate and the steel strip and reduce the amount of hot air passing through. Furthermore, a sealing mechanism is set to seal the port side of the gap between the heat insulation support and the heat insulation base to form a sealing cover to collect and constrain the hot air. In conjunction with a suction component, the airflow passing through the bottom edge of the sealing plate is guided to collect and constrain in the inner cavity of the sealing mechanism, and then concentrated and discharged, thereby further reducing the flow of hot air to downstream equipment and reducing the intensity of heating the downstream equipment. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This paper shows a schematic diagram of the standby state structure of the sealing device at the outlet end of the thin plate continuous quenching furnace in an embodiment of this application;

[0028] Figure 2 It shows Figure 1A schematic diagram of the working state of the sealing device at the outlet end of the thin plate continuous quenching furnace.

[0029] Figure 3 It shows Figure 1 A magnified view of a portion of the image, X1;

[0030] Figure 4 It shows Figure 1 A magnified view of a portion of the image, X2.

[0031] Figure label:

[0032] 100-Insulation bracket, 110-Frame, 120-Insulation castable base, 121-Sealing groove, 122-Vertical hole, 130-Sealing cover, 140-Guide sealing cylinder, 150-Ceramic fiber blanket;

[0033] 200 - Insulated base, 210 - Heat-resistant material block, 211 - Groove;

[0034] 300 - Sealing plate, 310 - First plate, 320 - Second plate;

[0035] 400-Moving mechanism, 410-Winder, 420-Cable, 430-Pulley, 440-Connecting rod;

[0036] 500 - Suction assembly, 510 - Branch pipe, 520 - Main pipe;

[0037] 600 - Seal mechanism; 610 - Seal cover; 620 - Sealing curtain;

[0038] 700 - Seal, 710 - Sealing surface, 711 - Clearance groove;

[0039] 800 - Quenching furnace; 810 - Furnace body frame; 820 - Quenching furnace roller conveyor;

[0040] 900 - Steel strip. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0042] Furthermore, reference numerals and / or reference letters may be repeated in different examples in this application. Such repetition is for simplification and clarity purposes and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0043] This application is described below with reference to the accompanying drawings and specific embodiments:

[0044] In a continuous thin plate processing production line, the quenching furnace and quenching machine are arranged close to each other, and the quenching machine is close to the outlet of the quenching furnace. It is easily affected by the hot air discharged from the outlet of the quenching furnace and the heat radiation, which heats the functional components of the quenching machine, causing the temperature to be too high and lose its function, which is not conducive to the operation of the production line unit.

[0045] Therefore, this application provides a sealing device for the outlet end of a thin-plate continuous quenching furnace, which aims to improve the sealing and heat insulation capabilities of the quenching furnace outlet area to a certain extent and reduce the thermal impact on downstream equipment.

[0046] Figure 1 This paper shows a schematic diagram of the standby state structure of the sealing device at the outlet end of the thin plate continuous quenching furnace in an embodiment of this application; Figure 2 It shows Figure 1 A schematic diagram of the working state of the sealing device at the outlet end of the thin plate continuous quenching furnace.

[0047] See Figure 1 and Figure 2 In some embodiments, the thin plate continuous quenching furnace outlet sealing device is installed in the outlet area of ​​the quenching furnace 800, and cooperates with the furnace body frame 810 and the quenching furnace roller conveyor 820 of the quenching furnace 800 to seal the outlet area outside the moving area of ​​the steel strip 900, so as to reduce the direct discharge of hot air and heat radiation through the quenching furnace outlet, and improve the sealing and heat insulation capability of the quenching furnace to a certain extent.

[0048] Therefore, the sealing device at the outlet end of the thin plate continuous quenching furnace may include: a heat insulation bracket 100, a heat insulation base 200, a sealing plate 300, a moving mechanism 400, a suction assembly 500, and a sealing mechanism 600.

[0049] The heat insulation bracket 100 and the heat insulation base 200 can be arranged vertically opposite each other and can be connected to the upper and lower structures of the outlet side of the furnace frame 810, respectively, as the installation base of the sealing and heat insulation function mechanism to achieve regional sealing.

[0050] The sealing plate 300 is the main heat insulation structure, sealing off a portion of the area between the heat insulation bracket 100 and the heat insulation base 200 to block heat radiation and hot air from passing through the quenching furnace to a certain extent. The sealing plate 300 is vertically movable within the heat insulation bracket 100, so that when in standby mode, the sealing plate 300 can be brought close to or even against the heat insulation base 200 to completely seal the quenching furnace outlet; during operation, the vertical movement of the sealing plate 300 can be adjusted according to the thickness of the steel strip 900 to ensure the distance from the lower edge of the heat insulation plate 300 to the steel strip 900, maintaining the smooth movement of the steel strip while minimizing gaps, thereby reducing the passage of hot air and heat radiation.

[0051] The moving mechanism 400 serves as the driving mechanism for raising and lowering the sealing plate 300. It is connected to the sealing plate 300 and can be installed on the heat insulation bracket 100 or connected to the furnace frame 810. This allows for stable vertical raising and lowering of the moving mechanism 400, precise control of the distance from the bottom edge of the sealing plate 300 to the heat insulation base, and stable and reliable balance between steel strip passage and heat insulation capability.

[0052] The sealing mechanism 600 can be configured as a cover-shaped structure, connected to the heat insulation bracket 100, and sealing one side port of the gap between the heat insulation bracket 100 and the heat insulation base 200, so as to collect and constrain the hot air flowing out of the gap below the sealing plate 300 through the inner cavity of the sealing mechanism 600, and prevent it from flowing directly to other equipment behind.

[0053] The suction assembly 500 communicates with the inner cavity of the sealing mechanism 600 to create a local negative pressure within the sealing mechanism 600, guiding the hot air flowing out of the quenching furnace through the gap below the sealing plate 300 and then collecting it into the inner cavity of the sealing mechanism 600; the collected hot air is then discharged through the suction assembly 500, thereby preventing the hot air from escaping and affecting downstream equipment.

[0054] In other words, in the sealing device at the outlet end of the thin-plate continuous quenching furnace provided in this application embodiment, a sealing and heat-insulating frame is formed by the heat insulation bracket 100 and the heat insulation base 200, which respectively seal the upper part of the quenching furnace outlet and the area below the quenching furnace roller conveyor; then, the gap between the heat insulation bracket 100 and the heat insulation base 200 or the gap between the heat insulation bracket 100 and the steel strip 900 is sealed by the sealing plate 300 that can move up and down in the heat insulation bracket 100, thereby achieving gap sealing in standby and working states, thereby reducing the amount of hot air flowing out and reducing heat radiation; furthermore, the hot air is collected and extracted by the sealing mechanism 600 and the suction mechanism 500 set at the port on one side of the gap, so as to reduce the influence of hot air and heat radiation as a whole.

[0055] In some embodiments, in order to improve the ventilation of the sealing plate 300 and the heat insulation bracket 100, the gap between the sealing plate 300 and the heat insulation bracket 100 can be set as a tortuous gap and the flow path can be extended, thereby increasing the difficulty of hot air dissipation.

[0056] Specifically, a sealing groove 121 can be opened at the top of the heat insulation bracket 100, and a vertical hole 122 can be opened at the bottom of the groove.

[0057] Correspondingly, the sealing plate 300 can be configured as a first plate 310 and a second plate 320 perpendicular to each other. The first plate 310 is disposed in the sealing groove 121 and connected to the moving mechanism 400, and the plate surface of the first plate 310 faces the bottom of the sealing groove 121, that is, it is laid flat in the sealing groove 121. The second plate 320 is vertically disposed in the vertical hole 122, and the top edge of the second plate 320 is connected to the bottom surface of the first plate 310, thereby forming a tortuous gap between the sealing plate 300 and the heat insulation bracket 100.

[0058] In other words, the sealing plate 300 can be configured as a T-shaped part, forming a gap path with multiple turns between the sealing groove 121 and the vertical hole 122, increasing the difficulty of air dissipation.

[0059] In some embodiments, in order to balance the thermal insulation performance and structural stability of the thermal insulation bracket 100, the thermal insulation bracket 100 may include a frame 110, a thermal insulation castable base 120, and a sealing cap 130.

[0060] The frame 110 serves as the installation and load-bearing foundation and can be fixedly installed on the quenching furnace frame 810. The heat-insulating castable base 120 can be formed by filling and casting heat-insulating castable within the frame 110, serving as the movable support and heat insulation body of the sealing plate 300. Correspondingly, the sealing groove 121 and the vertical hole 122 can both be formed on the heat-insulating castable base 120.

[0061] The sealing cap 130 is used to cover the sealing groove 121 to further reduce the escape of hot air. The sealing cap 130 can be connected to the heat-insulating castable base 120 and block and seal the sealing groove 121.

[0062] In some embodiments, in order to balance the sealing and heat insulation performance and the function of lifting the sealing plate 300, the lifting mechanism can be set in the groove 121, thereby completely sealing and insulating the sealing plate 300 and suppressing the upward movement of hot air, reducing heat dissipation.

[0063] In some embodiments, the moving mechanism 400 may also be disposed outside the groove; the moving mechanism 400 may include a winch 410, a cable 420, a pulley 430, and a connecting rod 440.

[0064] The winch 410 can be installed on the furnace frame 810. The pulley 430 is installed above the heat insulation bracket 100 via a bracket, and the connecting rod 440 is inserted into the through hole on the sealing cover 130. One end of the cable is connected to the winch 410, and the other end passes around the pulley 430 and is connected to the connecting rod 440. The lower end of the connecting rod 440 is connected to the sealing plate 300, so that the sealing plate 300 can be raised or lowered by the winch 410, and the height of the second plate 320 to the bottom can be adjusted to control the distance between the second plate 320 and the heat insulation base 200 or the steel strip 900, thereby reducing the heat dissipation gap.

[0065] In some embodiments, in order to reduce heat dissipation from the movement gap of the connecting rod 440, the number of connecting rods 440 can be reduced, and generally two rods can be used.

[0066] In some embodiments, the heat insulation bracket may further include a guide sealing cylinder 140, which serves to both guide and seal the connecting rod 440.

[0067] The guide sealing cylinder 140 can be disposed on the sealing cover 130 and communicate with the through hole on the sealing plate 130, and the connecting rod 440 can be vertically moved and disposed inside the guide sealing cylinder 140.

[0068] In some embodiments, considering that the first plate 310 is prone to high-temperature adhesion of the casting material under the heat of hot air, a ceramic fiber blanket 150 can be laid at the bottom of the sealing groove 121.

[0069] Figure 3 It shows Figure 1 A magnified view of a portion of the image, X1; Figure 4 It shows Figure 1 A magnified view of a portion of the image, X2.

[0070] See Figure 1 and Figure 3 In some embodiments, in order to improve the heat insulation performance of the lower gap area of ​​the second plate 320, a sealing member 700 can be provided at the bottom of the second plate 320, and a sealing surface 710 facing the heat insulation base 200 can be formed on the sealing member 700. The sealing surface 710 forms a gap length with a certain width, thereby increasing the movement path of hot air, increasing the difficulty of dissipation to a certain extent, and enhancing the heat insulation performance.

[0071] In some embodiments, the seal 700 may also extend to cover the surface of the second plate 320 to dynamically seal the second plate 320 and the vertical hole 122.

[0072] In some embodiments, considering that the length of the sealing surface 710 may be set to be greater than the roller spacing of the quenching furnace roller conveyor 820, an avoidance groove 711 may be provided on the sealing surface 710, so that in the standby state, the sealing member 700 and the bottom of the heat insulation base 200 can maintain a small gap or contact seal.

[0073] In some embodiments, the heat insulation base 200 may include a heat-resistant material block 210, which is formed by casting heat-resistant material and installed below the quenching furnace roller conveyor 820 to seal the lowering area.

[0074] In conjunction with this, a groove 211 adapted to the roller shape of the quenching furnace roller conveyor 820 can be formed on the upper part of the heat-resistant material block 210. The size of the groove 211 should be slightly larger than the size of the quenching furnace roller conveyor 820 to maintain the rotation gap of the quenching furnace roller conveyor 820 and reduce the impact on the operation of the quenching furnace roller conveyor 820.

[0075] See Figure 1 and Figure 2 In some embodiments, to improve the performance of hot air confinement and collection, the sealing assembly 600 may include a sealing cover 610 and a sealing curtain 620; wherein the sealing cover 610 is connected to the heat insulation bracket 100, and the sealing curtain 620 is vertically disposed inside the sealing cover 610 to combine sealing the port side of the gap between the heat insulation bracket 100 and the heat insulation base 200.

[0076] During operation, the sealing curtain 620 abuts against the upper surface of the steel strip 900, providing a contact seal and restricting the escape of hot air. Simultaneously, it also prevents water splashed from downstream equipment, such as the quenching machine, from entering the quenching furnace.

[0077] The sealing curtain 620 may be made of refractory ceramic fiber textile and is located adjacent to the upper edge of the quenching furnace roller conveyor 820. The lowest point of its natural drooping is lower than the height of the upper roller surface of the lower support roller.

[0078] The inner wall of the sealing cover 610 can be provided with lightweight castable material to achieve heat insulation.

[0079] In some embodiments, the suction port of the exhaust assembly 500 may be specifically located on the top of the enclosure 610. The exhaust assembly 500 may include a main exhaust pipe 520 and several branch pipes 510. The main exhaust pipe 520 is connected to the exhaust equipment and collects and delivers the exhaust air to the waste heat recovery pipeline. Exhaust valves may be installed on the branch pipes 510, and the exhaust volume can be controlled by controlling the opening degree of the exhaust valves.

[0080] See Figure 1 , Figure 2 and Figure 4 This application embodiment also provides a quenching furnace, including the above-mentioned thin plate continuous quenching furnace outlet end sealing device; the heat insulation bracket 100 is connected to the furnace body frame 810 of the quenching furnace and is arranged above the steel outlet of the quenching furnace; the heat insulation base 200 is arranged below the quenching furnace roller conveyor 820 and seals the gap below the quenching furnace roller conveyor 820.

[0081] When the quenching furnace is in operation, the distance H from the sealing surface 710 of the sealing element 700 to the steel strip should be controlled within 5-8 mm.

[0082] Without considering the movement of the steel strip 900, the heat leakage flow rate Q between the seal 700 and the steel strip is approximately: Q = H3AP / (12μL), where: A is the width of the quenching furnace cavity, i.e., the length of the quenching furnace roller conveyor; P is the pressure difference between the quenching furnace cavity and the sealing cover 610; and μ is a parameter related to gas characteristics. In other words, the smaller the height H between the lower part of the seal 700 and the upper surface of the steel strip 900, and the smaller the sealing surface length L between the lower part of the seal 700 and the upper surface of the steel strip 900, the smaller the heat leakage Q, and the better the sealing effect.

[0083] Meanwhile, the sealing curtain 620 is tightly attached to the upper surface of the steel strip 900 to prevent air and other impurities from the quenching machine side from entering the exhaust heat insulation box. By adjusting the exhaust valve of the exhaust device to a larger opening, the heat leaked from the gap between the built-in furnace door seal and the lightweight cast insulation material can be recovered to the waste heat recovery main pipeline, thus avoiding high-temperature baking of the relevant parts of the quenching machine.

[0084] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0085] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0086] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0087] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0088] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0090] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0091] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A sealing device at the outlet end of a thin-plate continuous quenching furnace, characterized in that, include: Thermal insulation bracket, thermal insulation base, sealing plate, moving mechanism, suction assembly, and sealing mechanism; The heat insulation bracket and the heat insulation base are arranged vertically opposite each other. The sealing plate is vertically movable inside the heat insulation bracket. The moving mechanism is connected to the sealing plate to drive the sealing plate to move and adjust the distance from the bottom edge of the sealing plate to the heat insulation base. The sealing mechanism is sealed on one side port of the gap between the heat insulation bracket and the heat insulation base. The suction component is connected to the inner cavity of the sealing mechanism to guide the hot air flowing out of the quenching furnace to gather and be constrained in the inner cavity of the sealing mechanism, and then be concentrated and suctioned out. The top of the heat insulation bracket is provided with a sealing groove, and the bottom of the sealing groove is provided with a vertical hole; The sealing plate includes a first plate and a second plate. The first plate is disposed in the sealing groove and connected to the moving mechanism, with the plate surface of the first plate facing the bottom of the sealing groove. The second plate is vertically disposed in the vertical hole, with the top edge of the second plate connected to the bottom surface of the first plate to form a tortuous gap between the sealing plate and the heat insulation bracket.

2. The sealing device at the outlet end of the thin-plate continuous quenching furnace as described in claim 1, characterized in that, The thermal insulation support includes a frame, a thermal insulation castable foundation, and a sealing cover; The heat-insulating castable base is filled and formed within the frame, and the sealing groove and the vertical hole are both formed in the heat-insulating castable base; The sealing cap is connected to the base of the heat-insulating castable, and the sealing cap blocks and seals the sealing groove.

3. The sealing device at the outlet end of the thin-plate continuous quenching furnace as described in claim 2, characterized in that, The moving mechanism includes: a winch, a cable, a pulley, and a connecting rod; The winch is connected to the connecting rod via a cable wound around the pulley. The connecting rod passes through a through hole in the sealing cover and is connected to the first plate, so that the second plate can be raised or lowered by the winch.

4. The sealing device at the outlet end of the thin-plate continuous quenching furnace as described in claim 3, characterized in that, The heat insulation bracket also includes a guide sealing cylinder, which is disposed on the sealing cover, and the connecting rod is vertically movable and disposed inside the guide sealing cylinder.

5. The sealing device at the outlet end of the thin-plate continuous quenching furnace as described in any one of claims 2 to 4, characterized in that, The sealing device at the outlet end of the thin plate continuous quenching furnace also includes a sealing element. The sealing element is connected to the bottom end of the second plate, and a sealing surface facing the heat insulation base is provided on the sealing element. A channel for the steel strip to move is formed between the sealing surface and the heat insulation base.

6. The sealing device at the outlet end of the thin-plate continuous quenching furnace as described in claim 5, characterized in that, The sealing element extends and covers the surface of the second plate, and the bottom of the sealing groove is provided with a ceramic fiber blanket opposite to the first plate.

7. The sealing device at the outlet end of the thin-plate continuous quenching furnace as described in claim 1, characterized in that, The sealing mechanism includes a sealing cover and a sealing curtain; The sealing cover is connected to the heat insulation bracket, and the sealing curtain is vertically arranged inside the sealing cover to seal the port side of the gap between the heat insulation bracket and the heat insulation base.

8. The sealing device at the outlet end of the thin-plate continuous quenching furnace as described in claim 1, characterized in that, The heat insulation base includes a heat-resistant material block. The upper part of the heat-resistant material block has a groove adapted to the shape of the quenching furnace roller conveyor, and the size of the groove is larger than the size of the quenching furnace roller conveyor, so as to maintain the rotation gap of the quenching furnace roller conveyor when the heat-resistant material block passes through and seals the gap of the quenching furnace roller conveyor.

9. A quenching furnace, characterized in that, Includes the sealing device at the outlet end of the thin plate continuous quenching furnace as described in any one of claims 1 to 8; The heat insulation bracket is connected to the furnace body frame of the quenching furnace and is located above the steel outlet of the quenching furnace. The heat insulation base is located below the quenching furnace roller conveyor, sealing off the gap below the quenching furnace roller conveyor.

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