Furnace door device and heat treatment furnace

Abstract

The furnace door device is applied to the heat treatment furnace and used for closing and opening an opening of a furnace body. The furnace door device comprises a first sealing piece and a second sealing piece which are connected and used for jointly sealing the opening of the furnace body. The first sealing piece is used for being connected with a heat treatment furnace; the second sealing piece is movably connected with the first sealing piece and used for partially opening the opening so that materials can pass through the opening. The furnace door device further comprises a driving piece, and the driving piece is arranged on the first sealing piece and connected with the second sealing piece to drive the second sealing piece to move relative to the first sealing piece. Materials are conveyed into and out of the furnace body, and only the second sealing piece is operated to partially open the opening of the furnace body, so that large gaps are avoided, loss of heat in the furnace body is reduced, the heat preservation effect of the heat treatment furnace is improved, the quality of heat treatment of the materials is better, energy loss is reduced, and energy consumption is reduced.

Description

Technical Field

[0001] The present application relates to heat treatment equipment, in particular to a furnace door device and a heat treatment furnace. Background Art

[0002] Heat treatment furnaces are used in industry to perform heat treatment on workpieces to improve their performance; the opening of the furnace body is opened and closed by a furnace door, and the workpiece is heated inside the furnace body.

[0003] During the process of conveying the workpiece into the furnace body and conveying it out of the furnace body, the furnace door remains open. During this process, the heat in the furnace will dissipate from the gap between the furnace door and the furnace body. In particular, as the size of the workpiece undergoing heat treatment increases, the longer the time it takes to enter the furnace opening, the more serious the heat loss problem will be. This results in poor insulation effect of the heat treatment furnace, affects the quality of heat treatment, causes energy waste, and reduces production efficiency. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a furnace door device and a heat treatment furnace, which are used to reduce heat loss during the process of workpieces entering and exiting, improve the thermal insulation effect, and improve production efficiency.

[0005] In order to achieve at least one of the above purposes, the present application provides the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a furnace door device, which is applied to a heat treatment furnace and is used to close and open an opening of a furnace body; the furnace door device comprises a first closing member and a second closing member, which are connected to jointly close the opening of the furnace body;

[0007] The first closing member is used to connect with the heat treatment furnace;

[0008] The second closing member is movably connected to the first closing member and is used to partially open the opening to allow material to pass through;

[0009] The furnace door device further comprises a driving member, which is arranged on the first closing member and connected to the second closing member to drive the second closing member to move relative to the first closing member.

[0010] In some embodiments, the second closure member is hingedly connected to the first closure member.

[0011] In some embodiments, the first closure member and the second closure member are hingedly connected via a hinge axis, and the hinge axis is located on the first surface and the side of the second surface facing the driving member;

[0012] A counterweight is fixedly connected to a side of the second closing member facing the driving member;

[0013] The center of gravity of the second closing member and the counterweight block is located in a set plane or on a side of the set plane facing the driving member;

[0014] The first surface is a surface of the first closing piece facing the second closing piece, the second surface is a surface of the second closing piece facing the first closing piece, and the setting plane is a vertical plane where the hinge axis is located.

[0015] In some embodiments, the first closure member and the second closure member are hingedly connected via a hinge axis, the hinge axis is located on a side of the first surface facing the driving member and is located at a set position on the second surface;

[0016] The center of gravity of the second closing member is located in the setting plane or on the side of the setting plane facing the driving member;

[0017] The first surface is a surface of the first closing piece facing the second closing piece, the second surface is a surface of the second closing piece facing the first closing piece, and the setting plane is a vertical plane where the hinge axis is located.

[0018] In some embodiments, the surface of the first closure member facing the second closure member is a first surface, and the surface of the second closure member facing the first closure member is a second surface;

[0019] The first surface and the second surface are both inclined, and the inclination angles of the two are adapted;

[0020] The sides of the first surface and the second surface facing away from the driving member are inclined downwards compared to the sides close to the driving member.

[0021] In some embodiments, the second closure member includes a plurality of second door panels;

[0022] A plurality of the driving members are provided, and correspond one-to-one to the plurality of the second door panels.

[0023] In the above technical scheme, a first closing piece and a second closing piece are arranged to cooperate to seal the opening of the furnace body, and a part of the second closing piece is moved relative to the first closing piece to open the opening of the furnace body. When the furnace door device is used to seal the opening of the furnace body, materials are transported in and out of the furnace body, and only the second closing piece is operated to partially open the opening of the furnace body to avoid generating a large gap, reduce the loss of heat in the furnace body, enhance the insulation effect of the heat treatment furnace, improve the quality of heat treatment of materials, reduce energy loss, and reduce energy consumption.

[0024] In a second aspect, an embodiment of the present application provides a heat treatment furnace, comprising a furnace body, a conveying mechanism, and a furnace door device as described in any one of the above items;

[0025] The furnace body is provided with an opening communicating with the internal furnace;

[0026] The conveying mechanism is used to drive materials into and out of the furnace body;

[0027] The furnace door device is connected to the furnace body and is used to close and open the opening;

[0028] The driving member is located at a side of the first closing member facing away from the interior of the furnace body.

[0029] In some embodiments, an abutment roller is provided on an edge of the second closing member that is away from the first closing member and faces away from the driving member;

[0030] The abutment roller is rotatably connected to the second closing member.

[0031] In some embodiments, the conveying mechanism is provided with a carrying surface for carrying the material;

[0032] The minimum distance between the first sealing member and the bearing surface is L; the thickness of the second sealing member is h, and the thickness of the material of the largest dimension is H;

[0033] L, h, H satisfy: L ≥ h + H;

[0034] The thickness of the second sealing member is the dimension in the material conveying direction, and the material thickness is the dimension in the direction perpendicular to the bearing surface.

[0035] In some embodiments, further comprising a lifting device;

[0036] The first closing member is slidably connected to the furnace body;

[0037] The lifting device is fixedly connected to the furnace body and connected to the first closing member to drive the first closing member to slide relative to the furnace body.

[0038] In the above technical solution, the heat treatment furnace uses a corresponding furnace door device to seal the opening, and the second closing piece partially opens the opening during the material flow process to reduce heat loss in the furnace body, improve the insulation effect of the heat treatment furnace, reduce energy waste, and reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0040] Figure 1 A schematic diagram of the structure of a heat treatment furnace provided in some embodiments of the present application;

[0041] Figure 2 A side schematic diagram of a furnace door device in a closed state provided in some embodiments of the present application;

[0042] Figure 3 A side schematic diagram of a furnace door device in an open state provided by some embodiments of the present application;

[0043] Figure 4 A front view schematic diagram of a furnace door device in a closed state provided in some embodiments of the present application;

[0044] Figure 5 A front view schematic diagram of a furnace door device in an open state provided by some embodiments of the present application;

[0045] Figure 6 A schematic diagram of the structure of a furnace door device provided in some other embodiments of the present application;

[0046] Figure 7 A schematic diagram of the structure of a furnace door device provided in some other embodiments of the present application;

[0047] Figure 8 A schematic diagram of processing materials of maximum thickness provided in some embodiments of the present application.

[0048] The reference numerals are as follows:

[0049] 1. Furnace body;

[0050] 2. first closure member, 21. crossbeam;

[0051] 3. second closing member, 31. second door panel, 32. avoidance portion, 33. hinge shaft, 34. counterweight, 35. abutting roller;

[0052] 4. Conveying mechanism;

[0053] 5. Driving parts;

[0054] 6. Lifting device. DETAILED DESCRIPTION

[0055] The present application is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present application will become clearer and more specific.

[0056] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field to which this application belongs; the terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0057] The "embodiment" mentioned in this application means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0058] The special word "exemplary" mentioned in this application means "used as an example, embodiment or illustrative". Any embodiment described as "exemplary" is not necessarily interpreted as being superior or better than other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0059] In the description of this application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary and secondary relationship of the indicated technical features.

[0060] In the description of this application, the technical term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0061] In the description of the present application, the orientations or positional relationships indicated by technical terms such as "upper", "lower", "inside", "outside", "front", "back", "left", "right", "top", and "bottom" are orientations or positional relationships based on the working state of the present application. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0062] In the description of this application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation" and the like 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 a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0063] In the description of the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0064] In the description of the present application, “plurality” means two or more (including two), unless otherwise clearly and specifically defined.

[0065] In the description of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0066] As part of the creative concept of the present application, before describing the embodiments of the present application, it is necessary to analyze the causes of heat loss problems in the heat treatment furnace during the process of workpieces entering and exiting the heat treatment furnace in the related technology, and obtain the technical solution of the embodiments of the present application through reasonable analysis.

[0067] For ease of description, the objects to be heat treated in the embodiments of the present application are collectively referred to as "materials". In the actual production process, the "materials" may be various workpieces and equipment in related fields that need to be heat treated.

[0068] In the related art, an opening connected to the internal furnace is provided on the furnace body of the heat treatment furnace, and a furnace door device is provided to open and close the opening, and the material is driven in and out of the furnace body by a conveying mechanism. During the process, the furnace door device is opened to allow the material to pass through, and is closed to isolate the internal furnace from the outside to reduce energy loss.

[0069] The furnace door device used is mostly a double-opening type, that is, two door panels are hinged to the furnace body, and the two sides of the two door panels are hingedly connected to the two sides of the opening on the furnace body, and the two door panels together close the furnace body opening. In addition, there is also a single-side door opening method, that is, one of the vertical edges of the door panel is hingedly connected to one of the vertical edges of the opening on the furnace body.

[0070] During the process of material in and out, the furnace door device opens the furnace body opening to allow the material to pass through. During this process, there will be a large gap between the furnace door device and the side wall of the furnace body, that is, there is a large open part at the opening of the furnace body. The heat in the furnace body diffuses to the outside of the furnace body through the open part at the opening. The larger the size of the material to be heat treated (here refers to the size of the material in the conveying direction), the longer it takes to pass through the furnace body opening, and the more heat is lost to the outside; resulting in poor overall insulation effect of the heat treatment furnace, which will adversely affect the efficiency and quality of heat treatment of materials, and due to heat loss, it will also cause increased energy consumption.

[0071] To this end, the present application provides a furnace door device and a heat treatment furnace, thereby solving the technical problems in the prior art of heat loss during the material entry and exit process, resulting in poor insulation effect of the heat treatment furnace, low heat treatment efficiency and quality.

[0072] The technical solutions of the embodiments of the present application are described in detail below in conjunction with the accompanying drawings. The technical features involved in the different implementation modes of the present application described below can be combined with each other as long as there is no conflict between them.

[0073] For the convenience of describing the following embodiments, the present application takes the steel plate as an example of the material to be heat treated. Of course, the material in the present application can also be other conventional workpieces and raw materials that need to be heat treated in the relevant field.

[0074] A heat treatment furnace is provided in the embodiment of the present application, referring to Figure 1 , shows a schematic diagram of the overall structure of a heat treatment furnace, which includes a furnace body 1 and a furnace door device. A heating mechanism is provided in the furnace chamber of the furnace body 1 for heat treating the material in the furnace chamber; in addition, a conveying mechanism 4 is provided, and the conveying mechanism 4 is used to carry and convey the material to be heat treated. An opening for the entry and exit of materials is provided on the side wall of the furnace body 1, and the furnace door device is connected to the furnace body 1, located at the opening, and is used to open and close the opening. The specific structure of the furnace body 1, the heating mechanism provided, and the conveying mechanism 4 are conventional equipment and structures in the existing heat treatment process in the field, and this part of the structure will not be described in detail in the embodiments of the present application.

[0075] refer to Figure 2 , and combined with Figure 1 The furnace door device includes a first closing piece 2 and a second closing piece 3, which are connected to jointly block the opening of the furnace body 1, wherein the first closing piece 2 is connected to the furnace body 1, blocks the upper half of the opening on the furnace body 1, and leaves a gap between the first closing piece 2 and the bearing surface of the conveying mechanism 4, and the gap is used for materials to pass through; correspondingly, the second closing piece 3 is located at the above-mentioned gap, and is movably connected to the first closing piece 2, and can cooperate with the first closing piece 2 to close the opening of the furnace body 1, and can also partially open the opening to allow materials to pass through.

[0076] In addition, the furnace door device is further provided with a driving member 5, which is arranged on the first closing member 2 and connected to the second closing member 3, driving the second closing member 3 to move relative to the first closing member 2 to achieve closing and partial opening of the opening.

[0077] The furnace door device is set to a split structure. During the normal material conveying process, only the second closing member 3 is controlled to be opened or closed. During the opening of the second closing member 3, the first closing member 2 is always in a closed state, that is, during the process of conveying materials through the opening, only a part of the opening is opened. Compared with the furnace door structure in the prior art, the gap between the furnace door and the side wall of the furnace body 1 is reduced; the heat dissipated from the furnace body 1 to the outside is reduced, the overall thermal insulation effect of the heat treatment furnace is better, the efficiency of thermal treatment of materials is higher, energy consumption is reduced, and energy is saved; due to the better thermal insulation effect, the temperature inside the furnace body 1 can be more accurately controlled, and the quality of thermal treatment of materials is also better.

[0078] refer to Figure 1 and Figure 2 The second closure member 3 is hinged to the first closure member 2, and the driving member 5 drives the second closure member 3 to rotate relative to the first closure member 2 to achieve the closing and partial opening of the opening. Of course, in other embodiments, the second closure member 3 and the first closure member 2 can also be set to be slidably connected. In this application, the second closure member 3 is hinged on the first closure member 2 as an example for explanation.

[0079] Exemplarily, the driving member 5 is a linear telescopic mechanism, such as a cylinder, a hydraulic cylinder, an electric push rod, etc. One end of the driving member 5 is hinged to the first closing member 2, and the other end is hinged to the second closing member 3. Through the telescopic action of the driving member 5, the second closing member 3 is driven to rotate relative to the first closing member 2. In other embodiments, the driving member 5 can also be set in a way that the motor retracts and releases the wire rope, and the wire rope is connected to the second closing member 3 to achieve the purpose of driving the second closing member 3 to rotate.

[0080] In the embodiments of the present application, for the convenience of description, reference is made to Figure 2 and Figure 3 The state in which the second closing member 3 and the first closing member 2 jointly block the opening of the furnace body 1 is called a closed state. Figure 2 The second closure member 3 is opened to allow the material to pass through the state is the open state, such as Figure 3 shown.

[0081] In order to ensure the smoothness of the rotation process of the second closing member 3 driven by the driving member 5, refer to Figure 1, a crossbeam 21 is fixedly connected to the first closure member 2, and the end of the driving member 5 is hinged on the crossbeam 21 to realize the hinge connection with the first closure member 2, so that in the closed state, there is an angle between the telescopic direction of the driving member 5 and the arrangement direction of the first closure member 2 and the second closure member 3, that is, there is an angle with the surfaces of the first closure member 2 and the second closure member 3 facing the closure member side. In this state, the second closure member 3 is driven to rotate by the driving member 5, and the direction of the force applied by the driving member 5 to the second closure member 3 is not perpendicular to the tangent direction of the rotation of the second closure member 3, thereby improving the smoothness of the process of driving the second closure member 3 to rotate.

[0082] refer to Figure 1 The heat treatment furnace also includes a lifting device 6, which is fixedly connected to the furnace body 1; the first closing member 2 is a plate-like structure, which is slidably connected to the furnace body 1, and the moving end of the lifting device 6 is connected to the first closing member 2, driving the first closing member 2 to slide relative to the furnace body 1.

[0083] In this way, during the material conveying process, only the second closing piece 3 is opened and closed to reduce heat loss; when the heat treatment furnace needs to be inspected and repaired, especially when the internal structure of the furnace chamber needs to be inspected and repaired, the lifting device 6 drives the first closing piece 2 to move, and the second closing piece 3 moves synchronously therewith, and the opening of the furnace body 1 is completely opened, so that the internal structure of the furnace body 1 can be inspected and repaired more conveniently, thereby improving the convenience of use.

[0084] Exemplarily, the lifting device 6 drives the first closing member 2 by means of a motor to wind up and release the wire rope. In other embodiments, a linear telescopic structure such as a hydraulic cylinder, a pneumatic cylinder, or an electric push rod may also be used, as long as it can drive the first closing member 2 to move relative to the furnace body 1 and lock it in a desired position.

[0085] refer to Figure 4 and Figure 5 The second closing member 3 includes a plurality of second door panels 31, which are located at the lower side of the first closing member 2 and arranged along the width direction of the furnace body 1, and each second door panel 31 is hinged to the first closing member 2; a plurality of driving members 5 are also provided, and the plurality of driving members 5 correspond one-to-one to the plurality of second door panels 31, and each driving member 5 drives the corresponding second door panel 31 to rotate relative to the first closing member 2.

[0086] This is because in the actual production process, the width of the material to be heat treated is different. Thus, when the width of the material to be heat treated is different, different numbers of second door panels 31 can be controlled to open, so that the opening range of the second door panels 31 is larger than the material width and as small as possible, thereby minimizing the gaps when the material passes through and reducing heat loss to the outside.

[0087] refer to Figure 2The lower side of the second door panel 31 is provided with an avoidance portion 32 to avoid the problem that the second door panel 31 interferes with the bearing surface of the conveying mechanism 4 during the rotation process. Exemplarily, the lower side surface of the second door panel 31 is set to be a curved surface.

[0088] refer to Figure 2 , the surface of the first closure member 2 facing the second door panel 31 is the first surface, and the surface of the second door panel 31 facing the first closure member 2 is the second surface; both the first surface and the second surface are inclined, and the inclination angles of the two are adapted. The inclination angle adaptation of the two referred to here means that: in the closed state, the first surface and the second surface are nearly parallel, and there is a certain angle between them and the horizontal plane; as shown in the figure, when the first closure member 2 and the second door panel 31 are both in a vertical state, the first surface and the second surface are parallel, but in actual situations, there is a small deviation between the angles of the first surface and the second surface, so the first surface and the second surface are defined to be nearly parallel, that is, the inclination angles of the first surface and the second surface are adapted.

[0089] In the closed state, the side of the first surface away from the driving member 5 is tilted downward compared to the side close to the driving member 5. Taking the driving member 5 located on the side of the first closing member 2 and the second door panel 31 facing the outside of the furnace body 1 as an example, it shows that the first surface and the second surface are tilted downward on one side facing the inside of the furnace body 1.

[0090] If the heat inside the furnace body 1 is to diffuse to the outside through the gap between the first surface and the second surface, it is first conducted to the openings of the first surface and the second surface facing the furnace body 1. In the process of diffusing outward, it will impact the first surface and the second surface. Through the process of impact and rebound, the heat transfer path is in a broken line shape; the process of heat diffusing outward from the gap between the first surface and the second surface is hindered to a certain extent, and compared with the method in which the first surface and the second surface are parallel to the horizontal plane, the diffusion path can be extended, which can hinder the process of heat diffusing to the outside to a certain extent and alleviate the problem of heat loss.

[0091] refer to Figure 6The second closing member 3 also includes a hinge shaft 33, and the second door panel 31 is hinged to the first closing member 2 through the hinge shaft 33. The hinge shaft 33 is located at the edge of the first surface and the second surface facing the outside of the furnace body 1, and the vertical plane where the hinge shaft 33 is located is the setting plane. A counterweight block 34 is fixedly connected to the side of the second door panel 31 facing the outside of the furnace body 1, and the counterweight block 34 and the second door panel 31 form a whole; when the surfaces of the first closing member 2 and the second door panel 31 facing the outside of the furnace body 1 are parallel to the setting plane, the center of gravity of the whole formed by the second door panel 31 and the counterweight block 34 is located in the setting plane or on the side of the setting plane facing the outside of the furnace body 1. In this way, when the center of gravity is located on the side of the setting plane facing the outside of the furnace body 1, under the action of its own weight, the lower side of the second door panel 31 rotates toward the inside of the furnace body 1 until the center of gravity is located in the setting plane, which can reduce the gap between the first surface and the second surface, reduce heat loss, and improve the insulation effect of the heat treatment furnace.

[0092] In another embodiment, reference Figure 7 The second door panel 31 can also be moved toward the outside of the furnace body 1, that is, the hinge shaft 33 is located at the edge of the first surface facing the outside of the furnace body 1, and is located in the middle position of the second surface, so that the center of gravity of the second door panel 31 is located in the set plane or on the side of the set plane facing the outside of the furnace body 1, thereby reducing the gap between the first surface and the second surface facing the inside of the furnace body 1.

[0093] refer to Figure 2 and Figure 3 , the edge of the second door panel 31 away from the first closing member 2 and facing away from the driving member 5 is rotatably connected with an abutting roller 35. In the process of conveying materials in and out of the furnace body 1, the second door panel 31 rotates, and a gap for the materials to pass through is formed between the second door panel 31 and the bearing surface of the conveying mechanism 4. In the process of the materials passing through, the abutting roller 35 is in contact with the upper surface of the materials. This can avoid the problem of wear caused by direct contact between the second door panel 31 and the materials, and can play a better protective role on the materials and the structure of the heat treatment furnace itself.

[0094] refer to Figure 8 , the minimum distance between the first closing member 2 and the bearing surface is L, the thickness of the second closing member 3, that is, the thickness of the second door panel 31 is h, the thickness of the material with the maximum thickness is H, L, h, H satisfy: L≥h+H; wherein, the thickness of the second closing member 3 is the dimension in the material conveying direction, and the material thickness is the dimension in the direction perpendicular to the bearing surface.

[0095] In this case, it can be ensured that when the material enters and exits the furnace body 1, as the material thickness increases, the first part of the furnace door device that contacts the material is always the abutment roller 35, thereby avoiding the problem of wear and damage caused by direct contact between the second door panel 31 and the material.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A furnace door device, applied to a heat treatment furnace, for closing and opening the opening of the furnace body; characterized in that: The furnace door device comprises a first closing member and a second closing member, which are connected to jointly block the opening of the furnace body; The first closing member is used to connect with the heat treatment furnace; The second closing member is movably connected to the first closing member and is used to partially open the opening to allow material to pass through; The furnace door device further comprises a driving member, which is arranged on the first closing member and connected to the second closing member to drive the second closing member to move relative to the first closing member.

2. The furnace door device according to claim 1, characterized in that: The second closing piece is hingedly connected to the first closing piece.

3. The furnace door device according to claim 2, characterized in that: The first closing member and the second closing member are hingedly connected via a hinge axis, and the hinge axis is located on the first surface and the second surface on a side facing the driving member; A counterweight is fixedly connected to a side of the second closing member facing the driving member; The center of gravity of the second closing member and the counterweight block is located in a set plane or on a side of the set plane facing the driving member; The first surface is a surface of the first closing piece facing the second closing piece, the second surface is a surface of the second closing piece facing the first closing piece, and the setting plane is a vertical plane where the hinge axis is located.

4. The furnace door device according to claim 2, characterized in that: The first closing member and the second closing member are hingedly connected via a hinge shaft, the hinge shaft is located on a side of the first surface facing the driving member and is located at a set position on the second surface; The center of gravity of the second closing member is located in the setting plane or on the side of the setting plane facing the driving member; The first surface is a surface of the first closing piece facing the second closing piece, the second surface is a surface of the second closing piece facing the first closing piece, and the setting plane is a vertical plane where the hinge axis is located.

5. The furnace door device according to claim 2, characterized in that: The surface of the first sealing member facing the second sealing member is a first surface, and the surface of the second sealing member facing the first sealing member is a second surface; The first surface and the second surface are both inclined, and the inclination angles of the two are adapted; The sides of the first surface and the second surface facing away from the driving member are inclined downwards compared to the sides close to the driving member.

6. The furnace door device according to any one of claims 1 to 5, characterized in that: The second closure member includes a plurality of second door panels; A plurality of the driving members are provided, and correspond one-to-one to the plurality of the second door panels.

7. A heat treatment furnace, characterized in that: It comprises a furnace body, a conveying mechanism and a furnace door device as claimed in any one of claims 1 to 6; The furnace body is provided with an opening communicating with the internal furnace; The conveying mechanism is used to drive materials into and out of the furnace body; The furnace door device is connected to the furnace body and is used to close and open the opening; The driving member is located at a side of the first closing member facing away from the interior of the furnace body.

8. The heat treatment furnace according to claim 7, characterized in that: An abutment roller is provided on the edge of the second closing member away from the first closing member and facing away from the driving member; The abutment roller is rotatably connected to the second closing member.

9. The heat treatment furnace according to claim 8, characterized in that: The conveying mechanism is provided with a bearing surface for bearing materials; The minimum distance between the first sealing member and the bearing surface is L; the thickness of the second sealing member is h, and the thickness of the material of the largest dimension is H; L, h, H satisfy: L ≥ h + H; The thickness of the second sealing member is the dimension in the material conveying direction, and the material thickness is the dimension in the direction perpendicular to the bearing surface.

10. The heat treatment furnace according to claim 7, characterized in that: Also includes a lifting device; The first closing member is slidably connected to the furnace body; The lifting device is fixedly connected to the furnace body and connected to the first closing member to drive the first closing member to slide relative to the furnace body.

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