Sealing door structure of kiln replacement chamber

Abstract

The utility model relates to the technical field of firing kiln equipment, in particular to a sealing door structure of a kiln replacement chamber, which comprises an outer lifting door, two lifting door upright posts, a lifting door frame and a driving device, the two door lifting stand columns are symmetrically arranged on the two sides of the replacement chamber, and the bottoms of the door lifting stand columns are fixedly connected with the base. The door lifting frame is fixedly arranged on the tops of the two door lifting stand columns. The driving device is fixedly arranged on the door lifting frame through a mounting plate; the device further comprises a door lifting counterweight device. The driving device comprises a motor, a transmission shaft, a transmission group arranged on the transmission shaft and a chain; one end of each chain is connected with the door lifting counterweight device, and the other end of each chain is connected with the outer lifting door, so that the driving device drives the outer lifting door and the door lifting counterweight device to lift through the chains. According to the door sealing structure, the motor is used for driving the chain wheel and the chain to control the outward lifting door to ascend and descend, opening and closing of the door sealing structure are achieved, the structure is simple, the excellent sealing effect is achieved, the control mode is reliable, operation stability is high, and the failure rate is low.

Description

Technical Field

[0001] The utility model relates to the technical field of firing furnace equipment, in particular to a door closing structure for a furnace replacement chamber. Background Art

[0002] A kiln is a device made of refractory materials for firing products and is an essential facility in pottery forming. Over tens of thousands of years of ceramic firing history of mankind, rich kiln building styles and experiences have been accumulated. From the open-air heap firing on the ground and pit building firing in primitive society to the round rising flame kiln in the shape of a bun, the semi-inverted flame horseshoe kiln, the Banpo dragon kiln, the duck egg-shaped kiln, and then to the current indoor gas kilns and electric kilns, kiln technology has been continuously improved and developed.

[0003] The furnace replacement chamber is arranged at the inlet and outlet of both ends of the furnace hearth and is used for gas replacement of the materials entering and leaving the furnace hearth. The furnace replacement chamber is a key device to ensure that the process gas in the furnace hearth of heat treatment kilns such as roller kilns reaches the required concentration. When the materials enter and leave the furnace hearth, gas replacement needs to be completed in the replacement chamber to ensure that the gas concentration inside the furnace hearth does not change.

[0004] In the firing process of the kiln, the sealing performance of the kiln is very important during the operation of the kiln and can directly affect the firing quality. Therefore, generally, high requirements are imposed on the sealing performance of the door closing of the furnace replacement chamber. The gates of the existing furnace replacement chambers are driven by cylinders or oil cylinders for both full opening and closing. However, this driving control method is unreliable. The cylinder is prone to air leakage, which may cause the cylinder to fail to drive the door to open or close. Once the oil cylinder leaks oil, not only will it lose the driving function, but it will also contaminate the equipment and products. At the same time, for the large-size replacement chamber of a heavy-duty kiln, its door closing is very heavy. When the gate is opened and an abnormal power failure or gas stop occurs at the site, the gate will fall, hitting and touching the products, and even causing personal injuries. In addition, there are generally two ways to seal and press between the gates and door frames of the existing furnace replacement chambers: ① Guide grooves are arranged on both sides of the door frame to guide the rollers on both sides of the gate. The guide grooves are biased towards the inner side of the furnace body below. The downward pressure of the cylinder or oil cylinder is divided into a horizontal force and a vertical downward force, and the separated horizontal force is used to press the door panel against the sealing gasket to tightly press the gate when the gate descends to the lowest end. However, this structure can only tightly press the lower part of the gate. ② The eccentric shaft rotates to tightly press the gate. However, both of these methods are only suitable for the sealing of small-size door panels, and there are still problems of poor sealing of large-size gates.

[0005] The utility model provides a door closing structure for a furnace replacement chamber to solve the problems existing in the prior art, such as unreliable control method, high failure rate, and poor sealing effect of the existing door closing structure. Summary of the Utility Model

[0006] The object of the present utility model is to provide a door closing structure for a replacement chamber of a kiln furnace, so as to solve the problems existing in the prior art, such as unreliable control mode, high failure rate, poor sealing effect, etc. of the existing door closing structure.

[0007] The technical solution of the present utility model is: a door closing structure for a replacement chamber of a kiln furnace, including an outer lifting door, two door lifting columns, a door lifting frame, and a driving device; the two door lifting columns are symmetrically arranged on both sides of the replacement chamber, and the bottom of the door lifting column is fixedly connected to the base; the door lifting frame is fixedly arranged on the tops of the two door lifting columns; the driving device is fixedly arranged on the door lifting frame through a mounting plate; wherein, the door closing structure further includes a door lifting weight device; the driving device includes a motor, a transmission shaft, a transmission group arranged on the transmission shaft and a chain; one end of each chain is connected to the door lifting weight device, and the other end is connected to the outer lifting door, so that the driving device drives the outer lifting door and the door lifting weight device to move up and down through the chain.

[0008] Preferably, the driving device further includes a pedestal bearing; the motor is arranged at one end of the door lifting frame through a mounting plate, the pedestal bearing is arranged on the door lifting frame and penetrates through the transmission shaft; the transmission group includes a driving wheel arranged at the output end of the motor, a driven wheel and a sprocket arranged on the transmission shaft, and a transmission chain surrounding the driving wheel and the driven wheel; the chain straddles the sprocket and meshes with the sprocket.

[0009] Preferably, a plurality of support frames are arranged between the two door lifting columns; guide rails are arranged on the opposite sides of the two door lifting columns;

[0010] The outer lifting door includes a door panel body and a plurality of guide wheels; the guide wheels are arranged on the side of the door panel body facing the door lifting column and are embedded in the guide rail, and the door panel body is pulled by the chain, so that the guide wheels move along the guide rail.

[0011] Preferably, it further includes a plurality of door pressing devices; the plurality of door pressing devices are fixedly arranged on the door lifting column and / or the support frame below the replacement chamber and act on at least one edge of the outer lifting door;

[0012] At least one door pressing device acts on the edge at the bottom of the outer lifting door for pressing the outer lifting door.

[0013] Preferably, the door pressing device includes a cylinder mounting base, a cylinder, and a pressing plate; the cylinder mounting base is fixedly connected to the door lifting column and / or the support frame below the replacement chamber; the cylinder is fixedly arranged on the cylinder mounting base; the pressing plate is arranged at the output end of the cylinder, so that the cylinder drives the pressing plate to act on the outer lifting door.

[0014] Preferably, it further includes an anti-falling device; the anti-falling device is fixedly arranged on the door lifting columns on both sides of the replacement chamber and is arranged at the top end position of the replacement chamber, and the output end of the anti-falling device is used to extend below the outer lifting door when the outer lifting door is fully opened.

[0015] Preferably, the anti-falling device includes an anti-falling cylinder, a cylinder mounting plate, and an anti-falling rod; the cylinder mounting plate is fixedly arranged on the door lifting column, the anti-falling cylinder is mounted on the cylinder mounting plate, and the anti-falling rod is connected to the output end of the anti-falling cylinder through a cylinder connecting piece, so that the anti-falling cylinder drives the anti-falling rod to move relatively.

[0016] Preferably, the door lifting counterweight device includes a door lifting counterweight block and a counterweight block protection module; the door lifting counterweight block is arranged inside the counterweight block protection module; a through hole for the chain to pass through is arranged at the upper end of the counterweight block protection module; the chain passes through the through hole and is connected to the door lifting counterweight block.

[0017] Preferably, a plurality of limiting blocks are arranged on one side of the counterweight block protection module close to the outer door.

[0018] Preferably, a limiting sleeve for limiting the position of the sprocket is arranged on the transmission shaft; a chain pressing strip for guiding is arranged at the upper end of the sprocket.

[0019] Compared with the prior art, the advantages of the present utility model are as follows:

[0020] (1) The present utility model provides a sealing door structure for a kiln replacement chamber. The sealing door structure uses a motor to drive a sprocket and a chain to control the lifting of the outer door of the replacement chamber, realizing the opening and closing of the sealing door structure; the structure is simple, the control method is reliable, the operation stability is high, and the failure rate is low; and the sealing door structure is configured with a door lifting counterweight device, which can greatly reduce the load borne by the driving device, making the sealing door structure more suitable for use in sealing doors of large-sized replacement chambers; secondly, the sealing door structure is also configured with a door pressing device, and the number and layout position of the door pressing devices are set according to the size and shape of the door panel, so that the sealing door structure has excellent sealing effect; solving the problems existing in the prior art, such as the unreliable control method, high failure rate, and poor sealing effect of the existing sealing door structure.

[0021] (2) The present utility model provides a sealing door structure for a kiln replacement chamber. The sealing door structure is also configured with an anti-falling device. When the outer door is fully opened, the anti-falling rod will be pushed below the door panel body. In case of accidental situations such as chain breakage, motor power failure, or incorrect operation, the anti-falling rod will immediately support the falling door panel body, preventing the door panel body from directly falling and causing safety accidents such as damaging the incoming and outgoing materials or causing personal injuries. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following further describes the present utility model in conjunction with the drawings and embodiments:

[0023] Figure 1 It is a schematic structural diagram of the sealing door structure provided by the present utility model;

[0024] Figure 2Schematic structural diagram of the driving device provided by the present utility model;

[0025] Figure 3 Schematic structural diagram of the chain and sprocket meshing provided by the present utility model;

[0026] Figure 4 Left view of the externally lifted door provided by the present utility model when in the working position;

[0027] Figure 5 Left view of the externally lifted door provided by the present utility model when in the original position;

[0028] Figure 6 Schematic structural diagram of the door lifting column provided by the present utility model;

[0029] Figure 7 Schematic structural diagram of the door pressing device provided by the present utility model;

[0030] Figure 8 Schematic structural diagram of the anti-falling device provided by the present utility model when in the original position;

[0031] Figure 9 Schematic structural diagram of the anti-falling device provided by the present utility model when in the working position;

[0032] Wherein: 1. Externally lifted door; 11. Door panel body; 12. Guide wheel; 2. Door lifting column; 20. Base; 21. Support frame; 22. Guide rail; 3. Door lifting frame; 4. Driving device; 41. Motor; 42. Transmission shaft; 43. Sprocket; 44. Transmission group; 45. Driving wheel; 46. Driven wheel; 47. Transmission chain; 48. Bearing with housing; 49. Limit sleeve; 5. Chain; 51. Chain pressing strip; 6. Door lifting counterweight device; 61. Door lifting counterweight block; 62. Counterweight block protection module; 63. Through hole; 64. Limit block; 7. Door pressing device; 71. Cylinder mounting base; 72. Cylinder; 73. Pressing plate; 8. Anti-falling device; 81. Cylinder mounting plate; 82. Anti-falling cylinder; 83. Anti-falling rod. Detailed implementation manners

[0033] The following combines specific embodiments to further elaborate on the content of the present utility model:

[0034] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the components referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0035] A sealing door structure for a kiln replacement chamber, as Figure 1 shown, comprising an externally lifted door 1, two door lifting columns 2, a door lifting frame 3, and a driving device 4; the two door lifting columns 2 are symmetrically arranged on both sides of the replacement chamber 10, and the bottom of the door lifting column 2 is fixedly connected to the base 20; the door lifting frame 3 is fixedly arranged on the tops of the two door lifting columns 2; the driving device 4 is fixedly arranged on the door lifting frame 3 through a mounting plate; wherein, the sealing door structure further comprises a door lifting weight device 6. The driving device 4 comprises a motor 41, a transmission shaft 42, a transmission group 44 arranged on the transmission shaft 42, and a chain 5; as Figure 2 shown, the motor 41 is arranged at one end of the door lifting frame 3 through a mounting plate; the transmission shaft 42 is penetrated with a plurality of pedestal bearings 48 and is arranged on the door lifting frame 3 through the pedestal bearings 48, and at the same time, the transmission shaft 42 is arranged parallel to the door lifting frame 3; the transmission group 44 comprises a driving wheel 45, a driven wheel 46, two sprockets 43, and a transmission chain 47, and the driving wheel 45 is arranged at the output end of the motor 41, the driven wheel 46 is arranged at one end of the transmission shaft 42 close to the motor 41, the two sprockets 43 are respectively arranged on the transmission shaft 42 and are symmetrically arranged at both ends of the transmission shaft 42, the transmission chain 47 is wound around the driving wheel 45 and the driven wheel 46, so that the driving wheel 45 drives the driven wheel 46 to rotate, and further drives the transmission shaft 42 to rotate; the chain 5 straddles the sprocket 43 and meshes with the sprocket 43, and one end of each chain 5 is connected to the door lifting weight device 6, and the other end is connected to the externally lifted door 1, so that the driving device 4 can drive the externally lifted door 1 and the door lifting weight device 6 to move up and down through the chain 5. In addition, as Figure 3 shown, a limit sleeve 49 for limiting the position of the sprocket 43 is further arranged on the transmission shaft 42 to prevent the sprocket 43 from tilting or translating along the transmission shaft 42; a chain pressing strip 51 for guiding is further arranged at the upper end of the sprocket 43.

[0036] As Figure 4 、 Figure 5As shown, when the external lifting door 1 needs to rise from the working position to the original position, that is, the external lifting door 1 of the replacement chamber 10 changes from the fully closed state to the fully open state, the driving device 4 is started. Under the action of the self-weight of the two door-lifting counterweight devices 6 and the transmission of the driving device 4, the external lifting door 1 will be driven upward by the two chains 5, and at the same time, the two door-lifting counterweight devices 6 will move downward; at this time, the sum of the self-weight of the two door-lifting counterweight devices 6 and the transmission force of the driving device 4 is greater than the self-weight of the external lifting door 1. Similarly, when the external lifting door 1 needs to descend from the original position to the working position, that is, the external lifting door 1 of the replacement chamber 10 changes from the fully open state to the fully closed state, the driving device 4 is started. Under the action of the self-weight of the external lifting door 1, the self-weight of the two door-lifting counterweight devices 6 and the transmission of the driving device 4, the external lifting door 1 moves downward slowly and smoothly; at this time, the sum of the self-weight of the two door-lifting counterweight devices 6 and the transmission force of the driving device 4 is less than the self-weight of the external lifting door 1. In this embodiment, two sprockets 43 are provided on the transmission shaft 42, and the two sprockets 43 are symmetrically arranged at both ends of the transmission shaft 42. Correspondingly, the door closing structure includes two door-lifting counterweight devices 6 and two chains 5; when driving the external lifting door 1 to move up and down; due to the self-weight of the door-lifting counterweight device 6, the load of the driving device 4 can be effectively reduced. In addition, the door closing structure is also equipped with a travel switch, which can be used to detect the position of the door panel body 11 in real time, so as to judge whether the door panel body 11 is fully opened or fully closed. In other embodiments, only one sprocket 43 may be provided on the transmission shaft 42, and the sprocket 43 is arranged in the middle of the transmission shaft 42. Correspondingly, the door closing structure includes one door-lifting counterweight device 6. At this time, in order to better reduce the load of the driving device 4, the self-weight of the door-lifting counterweight device 6 can be appropriately increased. Similarly, in other embodiments, more than two sprockets 43 may also be provided on the transmission shaft 42. Correspondingly, the door closing structure includes more than two door-lifting counterweight devices 6, and the total weight of the door-lifting counterweight devices 6 does not exceed the self-weight of the external lifting door 1. The door-lifting counterweight device 6 further includes a door-lifting counterweight block 61 and a counterweight block protection module 62; the door-lifting counterweight block 61 is arranged inside the counterweight block protection module 62; a through hole 63 for the chain 5 to pass through is provided at the upper end of the counterweight block protection module 62; the chain 5 passes through the through hole 63 and is connected to the door-lifting counterweight block 61. A plurality of limit blocks 64 are provided on one side of the counterweight block protection module 62 close to the door panel body 11. Since the chain 5 is flexible, when subjected to an external force, the door-lifting counterweight block 61 will swing and shake; the limit blocks 64 and the counterweight block protection module 62 can prevent the door-lifting counterweight block 61 from colliding with the door-lifting column 2 or other equipment when swinging and shaking.

[0037] A plurality of support frames 21 are arranged between the two door-lifting columns 2; as Figure 6As shown in the figure, guide rails 22 are provided on the opposite sides of two door lifting columns 2. The outer lifting door 1 includes a door panel body 11 and a plurality of guide wheels 12; the guide wheels 12 are arranged on the side of the door panel body 11 facing the door lifting column 2 and are embedded in the guide rails 22. The door panel body 11 is pulled by a chain 5, so that the guide wheels 12 move along the guide rails 22; thereby enabling the door panel body to move up and down along the door lifting column 2, effectively preventing the door panel body 11 from swinging during the up and down movement.

[0038] This door closing structure further includes three door pressing devices 7; as Figure 7 shown, the door pressing device 7 includes a cylinder mounting base 71, a cylinder 72, and a pressing plate 73; the cylinder mounting base 71 is fixedly connected to the support frame 21 below the replacement chamber; the cylinder 72 is fixedly arranged on the cylinder mounting base 71; the pressing plate 73 is arranged at the output end of the cylinder 72, so that the cylinder 72 drives the pressing plate 73 to act on the edge at the bottom of the outer lifting door 1. In other embodiments, the number and layout positions of the door pressing devices 7 can be set according to the size and shape of the door panel body. That is, this door closing structure can include a plurality of door pressing devices 7, and the door pressing devices 7 are fixedly arranged on the door lifting column 2 and / or the support frame 21 below the replacement chamber and act on at least one edge of the outer lifting door 1; and at least one door pressing device 7 acts on the edge at the bottom of the outer lifting door 1 for pressing the outer lifting door 1.

[0039] This door closing structure further includes a fall prevention device 8; the fall prevention device 8 is symmetrically arranged on the door lifting columns 2 on both sides of the replacement chamber 10 and is fixedly arranged at the top position of the replacement chamber 10. The output end of the fall prevention device 8 is used to extend below the outer lifting door 1 when the outer lifting door 1 is fully opened. As Figure 8 、 Figure 9 shown, the fall prevention device 8 includes a fall prevention cylinder 82, a cylinder mounting plate 81, and a fall prevention rod 83; the cylinder mounting plate 81 is fixedly arranged on the door lifting column 2, the fall prevention cylinder 82 is installed on the cylinder mounting plate 81, and the fall prevention rod 83 is connected to the output end of the fall prevention cylinder 82 through a cylinder connecting piece, so that the fall prevention cylinder 82 drives the fall prevention rod 83 to move horizontally. When the door is fully opened, that is, when the outer lifting door 1 rises to the highest point, the fall prevention cylinders 82 installed on the door lifting columns 2 on the left and right sides of the replacement chamber will push the fall prevention rods 83 below the door panel body 11. If the chain 5 breaks or the motor 41 is misoperated, the fall prevention rods 83 will immediately support the falling door panel body 11, thereby effectively preventing the outer lifting door 1 in the fully opened state from directly falling in case of an accident and causing an accident.

[0040] The above embodiments are only used to illustrate the technical concept and characteristics of the present utility model. The purpose is to enable those who are familiar with this technology to understand the content of the present utility model and implement it accordingly, and it should not be used to limit the protection scope of the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes that fall within the meaning and scope of the equivalent elements of the claims in the present utility model.

Claims

1. A door closing structure for a replacement chamber of a kiln, comprising an externally lifted door (1), two door lifting columns (2), a door lifting frame (3), and a driving device (4); the two door lifting columns (2) are symmetrically arranged on both sides of the replacement chamber (10), and the bottom of the door lifting column (2) is fixedly connected to the base (20); the door lifting frame (3) is fixedly arranged on the tops of the two door lifting columns (2); the driving device (4) is fixedly arranged on the door lifting frame (3) through a mounting plate; characterized in that, It further includes a door lifting counterweight device (6); The driving device (4) includes a motor (41), a transmission shaft (42), a transmission group (44) arranged on the transmission shaft (42), and a chain (5); one end of each chain (5) is connected to the door lifting counterweight device (6), and the other end is connected to the outer door (1), so that the driving device (4) drives the outer door (1) and the door lifting counterweight device (6) to move up and down through the chain (5).

2. The sealing door structure of a replacement chamber of a kiln furnace according to claim 1, characterized in that: The motor (41) is arranged at one end of the door lifting frame (3) through a mounting plate, and the transmission shaft (42) penetrates through a pedestal bearing (48) and is arranged on the door lifting frame (3); The transmission group (44) includes a driving wheel (45) arranged at the output end of the motor (41), a driven wheel (46) and a sprocket (43) arranged on the transmission shaft (42), and a transmission chain (47) surrounding the driving wheel (45) and the driven wheel (46); the chain (5) passes over the sprocket (43) and meshes with the sprocket (43).

3. The sealing door structure of a replacement chamber of a kiln furnace according to claim 1, characterized in that: A plurality of support frames (21) are arranged between the two door lifting columns (2); guide rails (22) are arranged on one side of the two door lifting columns (2) facing each other; The outer door (1) includes a door panel body (11) and a plurality of guide wheels (12); the guide wheels (12) are arranged on one side of the door panel body (11) facing the door lifting column (2) and are embedded in the guide rail (22), and the door panel body (11) is pulled by the chain (5) to make the guide wheels (12) move along the guide rail (22).

4. The sealing door structure of a replacement chamber of a kiln furnace according to claim 3, wherein: It further includes a plurality of door pressing devices (7); the plurality of door pressing devices (7) are fixedly arranged on the door lifting column (2) and / or the support frame (21) below the replacement chamber and act on at least one edge of the outer door (1); At least one of the door pressing devices (7) acts on the bottom edge of the outer door (1) for pressing the outer door (1).

5. The sealing door structure of a replacement chamber of a kiln furnace according to claim 4, characterized in that: The door pressing device (7) includes a cylinder mounting base (71), a cylinder (72), and a pressing plate (73); the cylinder mounting base (71) is fixedly connected to the door lifting column (2) and / or the support frame (21) below the replacement chamber; the cylinder (72) is fixedly arranged on the cylinder mounting base (71); the pressing plate (73) is arranged at the output end of the cylinder (72), so that the cylinder (72) drives the pressing plate (73) to act on the outer door (1).

6. The sealing door structure of a kiln replacement chamber according to claim 1, characterized in that: It further includes a fall prevention device (8); the fall prevention device (8) is fixedly arranged on the door lifting columns (2) on both sides of the replacement chamber (10) and is arranged at the top end of the replacement chamber (10), and the output end of the fall prevention device (8) is used to extend below the outer door (1) when the outer door (1) is fully opened.

7. The sealing door structure of a replacement chamber of a kiln furnace according to claim 6, characterized in that: The anti-falling device (8) includes an anti-falling cylinder (82), a cylinder mounting plate (81), and an anti-falling rod (83); the cylinder mounting plate (81) is fixedly arranged on the door lifting column (2), the anti-falling cylinder (82) is mounted on the cylinder mounting plate (81), and the anti-falling rod (83) is connected to the output end of the anti-falling cylinder (82) through a cylinder connecting piece, so that the anti-falling cylinder (82) drives the anti-falling rod (83) to move relatively.

8. The sealing door structure of a kiln replacement chamber according to claim 1, characterized in that: The door lifting counterweight device (6) includes a door lifting counterweight block (61) and a counterweight block protection module (62); the door lifting counterweight block (61) is arranged inside the counterweight block protection module (62); a through hole (63) for the chain (5) to pass through is arranged at the upper end of the counterweight block protection module (62); the chain (5) passes through the through hole (63) and is connected to the door lifting counterweight block (61).

9. The sealing door structure of a replacement chamber of a kiln furnace according to claim 8, wherein: A plurality of limiting blocks (64) are arranged on one side of the counterweight block protection module (62) close to the outer door (1).

10. The sealing door structure of a replacement chamber of a kiln furnace according to claim 2, characterized in that: A limiting sleeve (49) for limiting the position of the sprocket (43) is arranged on the transmission shaft (42); a chain pressing strip (51) for guiding is arranged at the upper end of the sprocket (43).

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