Sealing device for vacuum furnace of kiln

Abstract

The utility model relates to a sealing device for a vacuum furnace of a kiln. The sealing device comprises a hollow furnace door storage structure, a hollow furnace body butt joint structure, a driving structure and a furnace door, wherein the hollow furnace body butt joint structure is arranged on the lower side of the furnace door storage structure; a first opening is formed in the bottom side of the furnace door storage structure; a second opening is formed in the top side of the furnace body butt-joint structure, a third opening is formed in the front side, and a fourth opening is formed in the rear side; the first opening and the second opening are arranged in a butt joint mode so that a containing cavity for the furnace door to move can be jointly formed between the inner space of the furnace door containing structure and the inner space of the furnace body butt joint structure. The driving structure is used for driving the furnace door to reciprocate in the accommodating cavity; when the furnace door is located in the furnace body butt joint structure, one side of the furnace door abuts against the rear side, provided with the fourth opening, of the furnace body butt joint structure so as to seal the fourth opening. The sealing effect is good after installation, and vacuum sealing can be achieved.

Description

Technical Field

[0001] The utility model relates to the field of roller kilns, in particular to a kiln vacuum furnace sealing device. Background Art

[0002] The roller kiln is a kiln used for continuous firing of corresponding products. It is characterized by the use of a series of horizontally arranged and closely spaced refractory rollers to carry and transport the product blanks. These rollers rotate continuously in the kiln, transferring the blanks from one end of the kiln (kiln head) to the other end (kiln tail). The design of the roller kiln allows the production process to be carried out uninterruptedly, thereby improving efficiency. In the existing roller kiln, it usually includes a feeding section, a vacuum section, a heating section, a cooling section and a discharging section. These areas are arranged in a straight line in sequence, and there is no inner furnace door with intervals between them. Therefore, the temperature and atmosphere of adjacent stages in the product firing process are mutually affected. Furthermore, for the vacuum section that needs to be evacuated, it is necessary to ensure the corresponding vacuum environment. At present, hinged cast iron furnace doors are mostly used as sealing structures. For the production process with high requirements for the firing temperature and atmosphere at each stage, the existing furnace door design has poor vacuum sealing effect, and the door opening and closing operation is inconvenient to control, which easily leads to a low product yield and cannot meet the corresponding production requirements. Utility Model Content

[0003] The utility model aims to provide a kiln vacuum furnace sealing device, which can be conveniently installed at the end of the kiln vacuum furnace and effectively improve the sealing effect of the kiln vacuum furnace.

[0004] In order to achieve the above-mentioned utility model object, the utility model provides a kiln vacuum furnace sealing device, comprising: a hollow furnace door storage structure, a hollow furnace body docking structure arranged at the lower side of the furnace door storage structure, a driving structure arranged at the upper side of the furnace door storage structure, and a furnace door;

[0005] A first opening is provided on the bottom side of the furnace door storage structure;

[0006] The furnace body docking structure is provided with a second opening on the top side, a third opening on the front side, and a fourth opening on the rear side;

[0007] The first opening and the second opening are butt-jointed to form a receiving cavity for the movement of the furnace door between the inner space of the furnace door receiving structure and the inner space of the furnace body butt-jointed structure;

[0008] The driving structure is used to drive the furnace door to reciprocate in the accommodating cavity; wherein, when the furnace door is located in the furnace body docking structure, one side of the furnace door abuts against the rear side of the fourth opening of the furnace body docking structure to close the fourth opening.

[0009] Furthermore, it also includes: a guiding structure and a limiting structure; the guiding structure is arranged in the accommodating cavity to limit the moving direction of the furnace door; the limiting structure is arranged at the bottom of the accommodating cavity to contact with the bottom end of the furnace door to limit the abutment position of the furnace door and the furnace body docking structure.

[0010] Furthermore, the guide structure is provided with a guide groove for limiting the movement direction of the furnace door; the guide groove comprises: a first guide part and a second guide part arranged in sequence from top to bottom; the second guide part is arranged inclined relative to the first guide part, for guiding the furnace door to approach and abut against one side of the furnace body docking structure.

[0011] Furthermore, the first guide portion has an opening at the top of the guide structure, and the opening is gradually reduced from top to bottom.

[0012] Furthermore, the limiting structure includes: a limiting structure body; the limiting structure body is vertically mounted on the bottom wall of the accommodating cavity; an inclined guide surface is arranged at the top of the limiting structure body; the guide surface is used to contact the bottom end of the furnace door, so as to guide the furnace door to approach and abut against one side of the furnace body docking structure. Further, the furnace door includes: a furnace door body, a hanging seat arranged at the top of the furnace door body, and guide connectors arranged at the left and right ends of the furnace door body; an annular sealing strip is embedded in one side of the furnace door body to form a sealing side of the furnace door, and the guide connector is connected to the other side of the furnace door body; the sealing side of the furnace door abuts against the rear side of the furnace body docking structure; the guide connector is arranged adjacent to the top of the furnace door body; the guide connector is movably connected to the guide groove of the guide structure.

[0013] Furthermore, the guide connecting member comprises: a connecting seat and a rolling member; the connecting seat is provided with a protruding connecting shaft, and the rolling member is sleeved on the connecting shaft.

[0014] Furthermore, the furnace door body is provided with an embedding groove; the connecting seat is detachably embedded in the embedding groove.

[0015] Furthermore, the bottom wall of the accommodating cavity is provided with an ash discharge hole communicating with the upper and lower sides thereof; the ash discharge hole is detachably connected with a plug.

[0016] Furthermore, the driving structure is a linear driving module; the annular sealing strip is one of a silicone rubber strip, a fluororubber strip, a copper strip, and a lead strip.

[0017] The beneficial effects of the utility model are as follows: the kiln vacuum furnace sealing device of the utility model has a compact structure and saves space. The docking installation with the kiln vacuum furnace is achieved through the furnace body docking structure at the bottom, and the rest of the parts are all closed structural settings, so that the utility model has a good sealing effect after installation and can achieve vacuum sealing; it only contacts the sealing ring when the furnace door of the vacuum furnace is sealed, and the sealing ring has little wear and a long service life; by installing the sealing ring on the furnace door, the sealing ring can be replaced without dismantling the overall structure, thereby improving the convenience of maintenance; by forming an opening connected to the first guide part at the top of the guide structure, the furnace door can be easily installed and disassembled, effectively reducing the difficulty of disassembling the furnace door, thereby facilitating the maintenance and replacement of the furnace door; the limit structure set can achieve the limit abutment on the bottom end of the furnace door, thereby making the furnace door have a reliable sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a diagram schematically showing the sealing state of a kiln vacuum furnace sealing device in one embodiment of the utility model;

[0019] Figure 2 is a diagram schematically showing an opening state of a kiln vacuum furnace sealing device in one embodiment of the utility model;

[0020] Figure 3 It is a schematic representation Figure 2 A magnified view of position A in the middle;

[0021] Figure 4 It is a schematic representation Figure 2 A magnified view of position B in the middle;

[0022] Figure 5 It is a diagram schematically showing the relative positions of the furnace door and the limiting structure of the kiln vacuum furnace sealing device in a sealed state in one embodiment of the utility model;

[0023] Figure 6 Schematically shows the sealing side structure of a furnace door in one embodiment of the utility model;

[0024] Figure 7 It is a structural diagram schematically showing the other side of the furnace door in one embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the drawings required for the implementation are briefly introduced below. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms cannot be understood as limiting the present invention.

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. The implementation methods cannot be described one by one here, but the implementation methods of the present invention are not therefore limited to the following implementation methods.

[0028] Combination Figure 1 and Figure 2As shown, according to an embodiment of the utility model, a kiln vacuum furnace sealing device of the utility model comprises: a hollow furnace door storage structure 1, a furnace body docking structure 2 which is arranged at the lower side of the furnace door storage structure 1 and is hollow, a driving structure 3 which is arranged at the upper side of the furnace door storage structure 1, and a furnace door 4; in this embodiment, the furnace door storage structure 1 is a rectangular hollow structure as a whole, and a first opening is arranged at the bottom side, while the other sides are closed. Among them, the hollow part of the furnace door storage structure 1 can meet the storage of the furnace door 4 to realize its open state. In this embodiment, the furnace door storage structure 1 is outside the kiln vacuum furnace, and thus it is necessary to set its surrounding to be closed to ensure the overall sealing of the utility model and the kiln vacuum furnace after installation. Furthermore, the furnace body docking structure 2 is provided with a second opening on the top side, a third opening on the front side, and a fourth opening on the rear side; wherein, the furnace body docking structure 2 is used to achieve docking with the opening side of the kiln vacuum furnace, wherein the shapes of the front and rear sides of the furnace body docking structure 2 can be set to match the shape of the installation position, and the fourth opening is used to match the opening of the kiln vacuum furnace, and the third opening is used to match the opening of another docked furnace body. In this embodiment, the first opening is docked with the second opening to form a housing cavity for the movement of the furnace door 4 between the internal space of the furnace door storage structure 1 and the internal space of the furnace body docking structure 2; further, the driving structure 3 is used to drive the furnace door 4 to move back and forth in the housing cavity to realize the switch control of the fourth opening; specifically, when the furnace door 4 is located in the furnace door storage structure 1, the fourth opening is open, and when the furnace door 4 is located in the furnace body docking structure 2, one side of the furnace door 4 abuts against the rear side of the furnace body docking structure 2 where the fourth opening is set to close the fourth opening, thereby realizing the closure of the fourth opening, and thus realizing the closure of the connected kiln vacuum furnace. In this embodiment, in order to fully close the fourth opening, the area of ​​the furnace door 4 must be larger than the opening area of ​​the fourth opening, so that the entire fourth opening can be blocked and sealed.

[0029] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, according to an embodiment of the utility model, a kiln vacuum furnace sealing device of the utility model further includes: a guide structure 5 and a limiting structure 6; wherein the guide structure 5 is arranged in the accommodating chamber to limit the moving direction of the furnace door 4; in this embodiment, in order to achieve stable and reliable guidance of the furnace door 4, the guide structure 5 can be respectively arranged on the left and right sides of the accommodating chamber, so that the left and right sides of the furnace door 4 can be respectively connected to improve the stability and reliability of its guidance. Further, the limiting structure 6 is arranged at the bottom of the accommodating chamber, and is used to contact with the bottom end of the furnace door 4 to limit the abutment position of the furnace door 4 and the furnace body docking structure 2. Specifically, when the furnace door 4 moves downward until it contacts the limiting structure 6, as the furnace door 4 continues to move downward, it can be limited by the limiting structure 6, until the furnace door 4 moves into place, the limiting effect of the limiting structure 6 on the furnace door 4 is the greatest.

[0030] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, according to an embodiment of the utility model, the guide structure 5 is provided with a guide groove 51 for limiting the moving direction of the furnace door 4; wherein the guide structure 5 is in the shape of a long strip plate as a whole, and the guide groove 51 is arranged along the length direction of the guide structure 5. In this embodiment, the guide groove 51 can penetrate the body of the guide structure 5 along the thickness direction, so that when the guide structure 5 is installed in the vertical direction, the guide groove 51 can play a role in limiting the moving direction of the furnace door 4 in the vertical direction. In this embodiment, the guide groove 51 includes: a first guide portion 511 and a second guide portion 512 arranged in sequence from top to bottom; wherein the second guide portion 512 is arranged obliquely relative to the first guide portion 511, and is used to guide the furnace door 4 to approach and abut against one side of the furnace body docking structure 2. Specifically, if the furnace door 4 is required to close the fourth opening on the rear side of the furnace body docking structure 2, the second guide portion 512 needs to be inclined and extended in the vertical direction toward the rear side of the furnace body docking structure 2, so that the furnace door 4 can move along the second guide portion 512 and approach and abut against the rear side of the furnace body docking structure 2. In addition, the inclined second guide portion 512 can also limit and retain the furnace door 4 when it abuts against the rear side of the furnace body docking structure 2, so that the furnace door 4 has a reliable sealing effect.

[0031] like Figure 3 As shown, according to an embodiment of the present invention, the first guide portion 511 has an opening 511a at the top of the guide structure 5, and the opening 511a is gradually reduced from top to bottom.

[0032] Through the above arrangement, an opening 511a connected to the first guide part 511 is formed at the top of the guide structure 5, which can facilitate the installation and disassembly of the furnace door 4, effectively reducing the difficulty of disassembly and assembly of the furnace door 4, and thus facilitating the maintenance and replacement of the furnace door 4.

[0033] Combination Figure 2 and Figure 5 As shown, according to an embodiment of the present utility model, the limiting structure 6 includes: a limiting structure body 61; in this embodiment, the limiting structure body 61 can be set as a rectangular plate-shaped structure, which is vertically installed on the bottom wall of the accommodating cavity, wherein, since the furnace body docking structure 2 is a hollow structure, it is only provided with openings on the upper side and the front and rear sides, and the other sides are closed with a plate body, and then the bottom wall of the accommodating cavity is the bottom plate of the furnace body docking structure 2, and the limiting structure body 61 is supported and connected through the bottom plate. In this embodiment, an inclined guide surface 611 is provided at the top of the limiting structure body 61; wherein the guide surface 611 is used to contact with the bottom end of the furnace door 4, so as to guide the furnace door 4 to approach and abut against one side of the furnace body docking structure 2. Specifically, as mentioned above, if the furnace door 4 is required to close the fourth opening on the rear side of the furnace body docking structure 2, the guide surface 611 is inclined in the direction close to the rear side of the furnace body docking structure 2, that is, from top to bottom, the interval between the guide surface 611 and the rear side of the furnace body docking structure 2 is gradually reduced, and then, in the process of the furnace door 4 moving downward, the furnace door 4 can be guided by the guide surface 611 to approach and abut against the rear side of the furnace body docking structure 2, so that the furnace door 4 has a reliable sealing effect.

[0034] Combination Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7As shown, according to an embodiment of the utility model, the furnace door 4 includes: a furnace door body 41, a hanging seat 42 arranged at the top of the furnace door body 41, and guide connectors 43 arranged at the left and right ends of the furnace door body 41. In this embodiment, the furnace door body 41 is in the shape of a rectangular plate as a whole, and an annular sealing strip is embedded in one side of it to form the sealing side b of the furnace door 4, and the guide connector 43 is connected to the other side of the furnace door body 41. In this embodiment, an annular groove for installing the annular sealing strip can be provided on the furnace door body 41, and further, the annular sealing strip can be embedded in the annular groove by bonding or the like; wherein, when the annular sealing strip is worn and needs to be replaced, it can be directly removed to achieve the replacement of a new annular sealing strip. In this embodiment, the sealing side b of the furnace door 4 abuts against the rear side of the furnace body docking structure 2, wherein the annular area of ​​the annular sealing strip provided on the sealing side b is larger than the opening area of ​​the fourth opening, and thus when the sealing side b of the furnace door abuts against the rear side of the furnace body docking structure 2, the annular sealing strip can be pressed against the periphery of the fourth opening, thereby achieving a sufficient sealing effect at the abutting position.

[0035] In this embodiment, the guide connector 43 is disposed adjacent to the top of the furnace door body 41; wherein the furnace door body 41 is provided with an embedding groove 41a, and the connecting seat 431 is detachably embedded in the embedding groove 41a. In this embodiment, the guide connector 43 can be fixed to the furnace door body 41 by a threaded connector.

[0036] In this embodiment, the guide connector 43 is movably connected to the guide groove 51 of the guide structure 5; wherein the guide connector 43 comprises: a connection seat 431 and a rolling member 432. In this embodiment, the connection seat 431 is provided with a protruding connection shaft 431a, and the rolling member 432 is sleeved on the connection shaft 431a. In this embodiment, the rolling member 432 is adapted to the width of the guide groove 51, and the rolling connection with the guide groove 51 can be conveniently achieved. In this embodiment, the rolling member 432 can be implemented by a needle bearing.

[0037] In this embodiment, the lifting seat 42 is provided with a lifting hole 421 for connecting with the driving structure 3; wherein the lifting seat 42 is fixed at the middle position of the top of the furnace door body 41 by a threaded connector. In this embodiment, the lifting hole 421 is a horizontally arranged length circular hole. Through the provided lifting hole 421, the furnace door body 41 can be conveniently moved in the lateral direction, thereby cooperating with the displacement generated by the guiding action of the second guide portion 512 in the guide groove 51 and the guide surface 611 in the limiting structure 6, thereby facilitating the closing of the fourth opening by the furnace door 4.

[0038] like Figure 5As shown, according to an embodiment of the utility model, the bottom wall of the accommodating cavity is provided with an ash discharge hole 2a communicating with the upper and lower sides thereof, and the ash discharge hole 2a is detachably connected with a plug 2a1. In this embodiment, the plug 2a1 is connected to the ash discharge hole 2a by threaded connection, so as to facilitate removal when ash is discharged, and the ash discharge hole 2a is closed when ash discharge is not required to ensure the airtightness of the entire sealing device after installation.

[0039] like Figure 1 As shown, according to an embodiment of the present invention, the driving structure 3 is a linear driving module; wherein the driving structure 3 can be implemented by a mechanism that can generate linear motion, such as an electric cylinder, a pneumatic cylinder, a gear rack structure, etc. In this embodiment, the telescopic end of the driving structure 3 can be extended into the accommodating cavity, and connected to the hanging hole 421 on the hanging seat 42 through a connecting shaft provided at its end.

[0040] According to an implementation manner of the utility model, the annular sealing strip is one of a silicone rubber strip, a fluororubber strip, a copper strip, and a lead strip.

[0041] In order to further illustrate this solution, the operation process of the utility model is further elaborated.

[0042] a) Open state: the furnace door 4 is pulled back into the furnace door storage structure 1 by the driving structure 3, and the sealing side b of the furnace door 4 is separated from the rear side of the furnace body docking structure 2; at this time, the third opening and the fourth opening of the furnace body docking structure 2 are connected through the internal space of the furnace body docking structure 2, realizing the opening of the utility model;

[0043] b) Sealed state: the furnace door 4 slowly falls down under the drive of the driving structure 3 until the rolling element 432 on the furnace door 4 moves to the second guide portion 512 of the guide groove 51, and the sealing side b of the furnace door 4 approaches the rear side of the furnace body docking structure 2. As the descending distance increases, the distance between the furnace door 4 and the side of the furnace body docking structure 2 decreases until they abut against each other. At this time, the bottom end of the furnace door 4 is also guided by the guide surface 611 on the limiting structure 6 to limit the bottom end of the furnace door 4, so that the bottom end of the furnace door 4 can also approach and abut against the side of the furnace body docking structure 2, until the furnace door 4 moves into place, and the sealing side b of the furnace door 4 is always abutted against the rear side of the furnace body docking structure 2 under the action of the driving structure 3, the second guide portion 512 and the guide surface 611, so as to close the corresponding fourth opening to achieve a sealing effect.

[0044] The above contents are merely examples of specific solutions of the present invention. For the equipment and structures not described in detail, it should be understood that they are implemented by adopting the general equipment and general methods available in the art.

[0045] The above is only one solution of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A kiln vacuum furnace sealing device, characterized in that: include: A hollow furnace door storage structure (1), a hollow furnace body docking structure (2) arranged at the lower side of the furnace door storage structure (1), a driving structure (3) arranged at the upper side of the furnace door storage structure (1), and a furnace door (4); The bottom side of the furnace door storage structure (1) is provided with a first opening; The furnace body docking structure (2) is provided with a second opening on the top side, a third opening on the front side, and a fourth opening on the rear side; The first opening is connected to the second opening so as to form a receiving cavity for the movement of the furnace door (4) in the internal space of the furnace door storage structure (1) and the internal space of the furnace body connection structure (2); The driving structure (3) is used to drive the furnace door (4) to move back and forth in the accommodating cavity; wherein, when the furnace door (4) is located in the furnace body docking structure (2), one side of the furnace door (4) abuts against the rear side of the furnace body docking structure (2) where the fourth opening is provided, so as to close the fourth opening.

2. The kiln vacuum furnace sealing device according to claim 1, characterized in that: Also includes: A guiding structure (5) and a limiting structure (6); The guide structure (5) is arranged in the accommodating cavity and is used to limit the moving direction of the furnace door (4); The limiting structure (6) is arranged at the bottom of the accommodating cavity and is used to contact the bottom end of the furnace door (4) to limit the abutment position of the furnace door (4) and the furnace body docking structure (2).

3. The kiln vacuum furnace sealing device according to claim 2, characterized in that: The guide structure (5) is provided with a guide groove (51) for limiting the moving direction of the furnace door (4); The guide groove (51) comprises: a first guide portion (511) and a second guide portion (512) which are arranged in sequence from top to bottom; The second guide portion (512) is arranged to be inclined relative to the first guide portion (511) and is used to guide the furnace door (4) to approach and abut against one side of the furnace body docking structure (2).

4. The kiln vacuum furnace sealing device according to claim 3, characterized in that: The first guide portion (511) has an opening (511a) at the top end of the guide structure (5), and the opening (511a) is gradually reduced from top to bottom.

5. The kiln vacuum furnace sealing device according to claim 4, characterized in that: The limiting structure (6) comprises: a limiting structure body (61); The limiting structure body (61) is vertically mounted on the bottom wall of the accommodating cavity; The top end of the limiting structure body (61) is provided with an inclined guide surface (611); The guide surface (611) is used to contact the bottom end of the furnace door (4) so ​​as to guide the furnace door (4) to approach and abut against one side of the furnace body docking structure (2).

6. The kiln vacuum furnace sealing device according to claim 5, characterized in that: The furnace door (4) comprises: a furnace door body (41), a hanging seat (42) arranged at the top of the furnace door body (41), and guide connecting members (43) arranged at the left and right ends of the furnace door body (41); An annular sealing strip is embedded in one side of the furnace door body (41) to form a sealing side of the furnace door (4), and the guide connecting member (43) is connected to the other side of the furnace door body (41); The sealing side of the furnace door (4) abuts against the rear side of the furnace body docking structure (2); The guide connection member (43) is disposed adjacent to the top end of the furnace door body (41); The guide connecting member (43) is movably connected to the guide groove (51) of the guide structure (5).

7. The kiln vacuum furnace sealing device according to claim 6, characterized in that: The guide connecting member (43) comprises: a connecting seat (431) and a rolling member (432); The connecting seat (431) is provided with a protruding connecting rotating shaft (431a), and the rolling element (432) is sleeved on the connecting rotating shaft (431a).

8. The kiln vacuum furnace sealing device according to claim 7, characterized in that: The furnace door body (41) is provided with an embedding groove (41a); The connecting seat (431) is detachably embedded in the embedding groove (41a).

9. The kiln vacuum furnace sealing device according to claim 8, characterized in that: The bottom wall of the accommodating cavity is provided with an ash discharge hole (2a) communicating with the upper and lower sides thereof; The ash discharge hole (2a) is detachably connected with a plug (2a1).

10. The kiln vacuum furnace sealing device according to claim 6, characterized in that: The driving structure (3) is a linear driving module; The annular sealing strip is one of a silicone rubber strip, a fluororubber strip, a copper strip, and a lead strip.

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