Rotary kiln with high sealing performance

Abstract

The utility model discloses a rotary kiln with high sealing performance, which comprises a feeding mechanism, a feeding sealing cover assembly, a kiln pipe, a discharging sealing cover assembly, two sealing mechanisms, an electromagnetic induction heating coil and a support frame, and each sealing mechanism comprises a cooling assembly, a sealing packing and a locking assembly; the feeding mechanism is connected to the front end of the kiln pipe, the feeding sealing cover assembly and the discharging sealing cover assembly are connected to the front end and the rear end of the kiln pipe respectively, and one sealing mechanism is arranged at the joint of the feeding sealing cover assembly and the front end of the kiln pipe. The kiln pipe is rotatably mounted on the supporting frame, and the electromagnetic induction heating coil is arranged on the periphery of the kiln pipe; the cooling assembly is arranged on the outer side face of the kiln pipe, and the sealing packing is installed on the cooling assembly through the locking assembly. According to the scheme, the problem that in a traditional rotary kiln structure, when the heater continuously heats the kiln pipe at high temperature, the sealing packing is prone to thermal aging due to the fact that the sealing packing makes direct contact with the outer side face of the kiln pipe is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kiln sealing, in particular to a rotary kiln with high sealing performance. Background Art

[0002] The traditional rotary kiln structure mainly consists of a kiln tube, two sealing hood assemblies, two sealing assemblies and a heater. Among them, the sealing assembly usually consists of a sealing packing and a locking member. The two sealing hood assemblies are respectively connected to both ends of the kiln tube. A sealing assembly is arranged at the connection between the sealing hood assembly and the kiln tube to seal the kiln tube and prevent the raw materials inside the kiln tube from leaking. The heater is arranged on the kiln tube and can heat the kiln tube. During the process of arranging the sealing assembly at the connection between the sealing hood assembly and the kiln tube, specifically, the sealing packing is fixed to the outer side of the kiln tube through the locking member. However, when the heater continuously heats the kiln tube at a high temperature, since the sealing packing is in direct contact with the outer side of the kiln tube, the sealing packing is prone to thermal aging, especially carbonization phenomenon, resulting in a reduction in the service life of the sealing packing. Content of the Utility Model

[0003] Aiming at the above defects, the utility model provides a rotary kiln with high sealing performance, aiming to solve the problem that in the traditional rotary kiln structure, when the heater continuously heats the kiln tube at a high temperature, since the sealing packing is in direct contact with the outer side of the kiln tube, the sealing packing is prone to thermal aging, resulting in a reduction in the service life of the sealing packing.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] A rotary kiln with high sealing performance includes a feeding mechanism, a feeding sealing hood assembly, a kiln tube, a discharging sealing hood assembly, at least two sealing mechanisms, an electromagnetic induction heating coil, a support frame and a kiln tube driving assembly. The sealing mechanism includes a cooling component, a sealing packing and a locking component;

[0006] The feeding mechanism is connected to the front end of the kiln tube, and the feeding mechanism is used to feed raw materials into the interior of the kiln tube. The feeding sealing hood assembly is connected to the front end of the kiln tube, and the discharging sealing hood assembly is connected to the rear end of the kiln tube. The feeding sealing hood assembly is used to seal the kiln tube, and the discharging sealing hood assembly is used to seal the kiln tube and send the finished product to the outside of the kiln tube. One of the sealing mechanisms is arranged at the connection between the feeding sealing hood assembly and the front end of the kiln tube, and the other sealing mechanism is arranged at the connection between the discharging sealing hood assembly and the rear end of the kiln tube. The kiln tube is rotatably installed on the support frame, the kiln tube driving assembly is installed on the kiln tube, and the kiln tube driving assembly is used to drive the kiln tube to rotate. The electromagnetic induction heating coil is arranged around the kiln tube;

[0007] The temperature reduction component is arranged on the outer side surface of the kiln tube. The sealing packing is installed on the temperature reduction component through the locking component. The temperature reduction component is used to reduce the temperature of the surface of the kiln tube during the high-temperature heating process.

[0008] Preferably, the temperature reduction component includes a heat insulation ring and a temperature reduction ring. Both the heat insulation ring and the temperature reduction ring are sleeved on the outer side surface of the kiln tube. The bottom of the heat insulation ring is connected to the bottom of the temperature reduction ring. A temperature reduction cavity is formed between the heat insulation ring and the temperature reduction ring.

[0009] Preferably, the locking component includes a sealing seat and a plurality of screws. The sealing seat is sleeved on the temperature reduction ring and is installed on the feeding sealing cover component or the discharging sealing cover component through the screws.

[0010] Preferably, the locking component further includes a first axial elastic pressing ring, a second axial elastic pressing ring and two spacer rings. There are two sealing packings.

[0011] Both of the two sealing packings are sleeved on the temperature reduction ring. The bottom of one of the sealing packings is closely attached to the sealing seat. One of the spacer rings is arranged between the two sealing packings. The other spacer ring is closely attached to the top of the other sealing packing. The bottom of the first axial elastic pressing ring is closely attached to the other spacer ring. The bottom of the second axial elastic pressing ring is closely attached to the sealing seat. The top of the first axial elastic pressing ring is installed on the top of the second axial elastic pressing ring through the screws.

[0012] Preferably, the locking component further includes two radial elastic pressing rings. The two radial elastic pressing rings are respectively installed on the corresponding sealing packings through the respective screws passing through the second axial elastic pressing ring.

[0013] Preferably, the feeding mechanism includes a spiral feeding component, a feeding hopper, a feeding pipe and a control valve. The feeding hopper and the feeding pipe are arranged vertically. The control valve is installed between the feeding hopper and the feeding pipe. The feeding pipe is communicated with the spiral feeding component.

[0014] The technical solution provided by the present utility model may include the following beneficial effects:

[0015] In this solution, a sealing mechanism composed of a cooling component, a packing gland, and a locking component is set, and sealing mechanisms are provided at the connection between the feed sealing cover component and the front end of the kiln tube, and at the connection between the discharge sealing cover component and the rear end of the kiln tube, respectively, to ensure the sealing performance inside the kiln tube. During the process of setting the sealing mechanism, specifically, the cooling component is first set on the outer side of the kiln tube, and then the packing gland is installed on the cooling component through the locking component. When the kiln tube is heated at a high temperature, the cooling component reduces the temperature on the surface of the kiln tube to a low temperature, which can effectively prevent the packing gland from undergoing thermal aging, thereby extending the service life of the packing gland. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a cross-sectional view of a rotary kiln with high sealing performance;

[0017] Figure 2 is Figure 1 a partial enlarged view of area A in

[0018] Wherein, 1, feeding mechanism; 2, feed sealing cover component; 3, kiln tube; 4, discharge sealing cover component; 5, sealing mechanism; 6, electromagnetic induction heating coil; 7, support frame; 8, kiln tube driving component; 11, screw feeding component; 12, feed hopper; 13, feed pipe; 14, control valve; 51, cooling component; 52, packing gland; 53, locking component; 510, cooling cavity; 511, heat insulation ring; 512, cooling ring; 531, sealing seat; 532, screw; 533, first axial elastic pressing ring; 534, second axial elastic pressing ring; 535, spacer ring; 536, radial elastic pressing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solution of the present invention will be further described below with reference to the drawings and through specific embodiments.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "middle", "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0021] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is more than two.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "splicing", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] A rotary kiln with high sealing performance, comprising a feeding mechanism 1, a feeding seal cover assembly 2, a kiln tube 3, a discharging seal cover assembly 4, at least two sealing mechanisms 5, an electromagnetic induction heating coil 6, a support frame 7, and a kiln tube driving assembly 8. The sealing mechanism 5 includes a cooling component 51, a sealing packing 52, and a locking component 53;

[0024] The feeding mechanism 1 is connected to the front end of the kiln tube 3. The feeding mechanism 1 is used to feed raw materials into the interior of the kiln tube 3. The feeding seal cover assembly 2 is connected to the front end of the kiln tube 3. The discharging seal cover assembly 4 is connected to the rear end of the kiln tube 3. The feeding seal cover assembly 2 is used to seal the kiln tube 3. The discharging seal cover assembly 4 is used to seal the kiln tube 3 and send the finished product to the outside of the kiln tube 3. One of the sealing mechanisms 5 is arranged at the connection between the feeding seal cover assembly 2 and the front end of the kiln tube 3, and the other sealing mechanism 5 is arranged at the connection between the discharging seal cover assembly 4 and the rear end of the kiln tube 3. The kiln tube 3 is rotatably installed on the support frame 7. The kiln tube driving assembly 8 is installed on the kiln tube 3. The kiln tube driving assembly 8 is used to drive the kiln tube 3 to rotate. The electromagnetic induction heating coil 6 is arranged on the periphery of the kiln tube 3;

[0025] The cooling component 51 is arranged on the outer side surface of the kiln tube 3. The sealing packing 52 is installed on the cooling component 51 through the locking component 53. The cooling component 51 is used to reduce the temperature of the surface of the kiln tube 3 during the high-temperature heating process.

[0026] A rotary kiln with high sealing performance according to this solution. In this embodiment, as Figure 1-2As shown, there are two sealing mechanisms 5 provided. First, the staff puts the raw materials into the feeding mechanism 1, and the feeding mechanism 1 can automatically feed the raw materials into the furnace tube 3. Then, the electromagnetic induction heating coil 6 is powered on, and the electromagnetic induction heating coil 6 can heat the furnace tube 3. At the same time, the furnace tube driving assembly 8 is started, and the furnace tube driving assembly 8 drives the furnace tube 3 to rotate, so that the raw materials in the furnace tube 3 can be fully heated and calcined to form finished products. Finally, the finished products are sent out of the furnace tube 3 through the discharge sealing cover assembly 4. Further explanation, the support frame 7 plays a supporting role for the furnace tube 3. The feeding sealing cover assembly 2, the discharge sealing cover assembly 4 and the furnace tube driving assembly 8 are all structures of the prior art.

[0027] In this solution, the sealing mechanism 5 composed of a cooling component 51, a sealing packing 52 and a locking component 53 is provided, and the sealing mechanism 5 is provided at the connection between the feeding sealing cover assembly 2 and the front end of the furnace tube 3 and at the connection between the discharge sealing cover assembly 4 and the rear end of the furnace tube 3 to ensure the tightness inside the furnace tube 3. During the setting of the sealing mechanism 5, specifically, the cooling component 51 is first set on the outer side of the furnace tube 3, and then the sealing packing 52 is installed on the cooling component 51 through the locking component 53. When the furnace tube 3 is heated at a high temperature, the cooling component 51 reduces the temperature on the surface of the furnace tube 3 to a low temperature, which can effectively prevent the sealing packing 52 from undergoing thermal aging, thereby improving the service life of the sealing packing 52.

[0028] Preferably, the cooling component 51 includes a heat insulation ring 511 and a cooling ring 512. Both the heat insulation ring 511 and the cooling ring 512 are sleeved on the outer side of the furnace tube 3. The bottom of the heat insulation ring 511 is connected to the bottom of the cooling ring 512, and a cooling cavity 510 is formed between the heat insulation ring 511 and the cooling ring 512.

[0029] In this embodiment, as Figure 2 shown, the heat insulation ring 511 is an annular structure made of heat insulation cotton, and the cooling ring 512 is an annular structure made of a cooling material. During the heating process of the furnace tube 3, the heat insulation ring 511 plays a heat insulation role, and the cooling ring 512 plays a cooling role. At the same time, the air in the external environment can enter the cooling cavity 510, and the heat dissipated during the heating of the furnace tube 3 can be taken away through the circulation of the air, so that the heat cannot be transferred to the sealing packing 52.

[0030] Preferably, the locking assembly 53 includes a sealing seat 531 and a plurality of screws 532; the sealing seat 531 is sleeved on the cooling ring 512 and is installed on the feed sealing cover assembly 2 or the discharge sealing cover assembly 4 through the screws 532. In this embodiment, as Figure 2 shown, the sealing seat 531 can seal the connection between the feed sealing cover assembly 2 or the discharge sealing cover assembly 4 and the furnace tube 3.

[0031] Preferably, the locking assembly 53 further includes a first axial elastic pressing ring 533, a second axial elastic pressing ring 534 and two spacer rings 535, and two sealing packing 52 are provided;

[0032] Both of the two sealing packing 52 are sleeved on the cooling ring 512. The bottom of one of the sealing packing 52 abuts against the sealing seat 531, one of the spacer rings 535 is arranged between the two sealing packing 52, and the other spacer ring 535 abuts against the top of the other sealing packing 52; the bottom of the first axial elastic pressing ring 533 abuts against the other spacer ring 535, the bottom of the second axial elastic pressing ring 534 abuts against the sealing seat 531, and the top of the first axial elastic pressing ring 533 is installed on the top of the second axial elastic pressing ring 534 through the screw 532.

[0033] In this embodiment, as Figure 2 shown, the combined cooperation of the first axial elastic pressing ring 533, the second axial elastic pressing ring 534 and the screw 532 can effectively apply an axial elastic force to the two sealing packing 52, so that the two sealing packing 52 can be stably fixed on the sealing seat 531. At the same time, it can ensure that after the two sealing packing 52 are slightly worn, they still maintain the corresponding pressing force, thereby ensuring the sealing effect of the two sealing packing 52. In addition, the setting of the screw 532 facilitates the installation and disassembly of the sealing packing 52.

[0034] Furthermore, the spacer ring 535 arranged between the two sealing packing 52 can effectively prevent the two sealing packing 52 from directly contacting and squeezing, thereby reducing the wear of the sealing packing 52 and improving the service life of the sealing packing 52. The spacer ring 535 that abuts against the top of the sealing packing 52 can effectively prevent the first axial elastic pressing ring 533 from directly contacting and squeezing with the sealing packing 52, thereby reducing the wear of the sealing packing 52 and improving the service life of the sealing packing 52.

[0035] Preferably, the locking assembly 53 further includes two radial elastic pressure rings 536 , and the two radial elastic pressure rings 536 are respectively installed on the corresponding sealing packing 52 through the second axial elastic pressure ring 534 via the respective screws 532 .

[0036] In this embodiment, Figure 2 As shown, the provision of the two radial elastic pressure rings 536 can apply radial elastic force to the corresponding sealing packings 52, so that the two sealing packings 52 can be stably fixed on the cooling ring 512. At the same time, it can ensure that the two sealing packings 52 still maintain the corresponding pressing force after slight wear, thereby ensuring the sealing effect of the two sealing packings 52. In addition, the provision of the screws 532 facilitates the installation and removal of the sealing packings 52.

[0037] It is further explained that the elastic force applied to the sealing packing 52 by the first axial elastic pressure ring 533, the second axial elastic pressure ring 534 and the radial elastic pressure ring 536 can effectively absorb and buffer the overload resistance generated by the deformation of the kiln tube 3, thereby preventing overload damage to the kiln tube drive assembly 8.

[0038] Preferably, the feeding mechanism 1 comprises a screw feeding assembly 11, a feeding hopper 12, a feeding pipe 13 and a control valve 14; the feeding hopper 12 and the feeding pipe 13 are arranged vertically and horizontally, the control valve 14 is installed between the feeding hopper 12 and the feeding pipe 13, and the feeding pipe 13 is connected to the screw feeding assembly 11. Figure 1 As shown, the screw feeding assembly 11 is a prior art structure. The staff first puts the raw material into the feed hopper 12, and then opens the control valve 14, so that the raw material in the feed hopper 12 can enter the feed pipe 13 through the control valve 14, and the raw material is transported in the feed pipe 13 and sent to the screw feeding assembly 11, and the screw feeding assembly 11 can automatically push the raw material into the kiln furnace tube 3 for subsequent calcination treatment.

[0039] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A rotary kiln with high sealing performance, characterized in that: It includes a feeding mechanism, a feeding seal cover assembly, a furnace tube, a discharging seal cover assembly, at least two sealing mechanisms, an electromagnetic induction heating coil, a support frame and a furnace tube driving assembly. The sealing mechanism includes a cooling component, a sealing packing and a locking component; The feeding mechanism is connected to the front end of the furnace tube. The feeding mechanism is used to feed raw materials into the interior of the furnace tube. The feeding seal cover assembly is connected to the front end of the furnace tube. The discharging seal cover assembly is connected to the rear end of the furnace tube. The feeding seal cover assembly is used to seal the furnace tube. The discharging seal cover assembly is used to seal the furnace tube and send the finished product to the outside of the furnace tube. One of the sealing mechanisms is arranged at the connection between the feeding seal cover assembly and the front end of the furnace tube, and the other sealing mechanism is arranged at the connection between the discharging seal cover assembly and the rear end of the furnace tube. The furnace tube is rotatably installed on the support frame. The furnace tube driving assembly is installed on the furnace tube. The furnace tube driving assembly is used to drive the furnace tube to rotate. The electromagnetic induction heating coil is arranged around the furnace tube; The cooling component is arranged on the outer side surface of the furnace tube. The sealing packing is installed on the cooling component through the locking component. The cooling component is used to reduce the temperature of the surface of the furnace tube during high-temperature heating.

2. The high-sealing rotary kiln according to claim 1, characterized in that: The cooling component includes a heat insulation ring and a cooling ring. Both the heat insulation ring and the cooling ring are sleeved on the outer side surface of the furnace tube. The bottom of the heat insulation ring is connected to the bottom of the cooling ring. A cooling cavity is formed between the heat insulation ring and the cooling ring.

3. The rotary kiln with high sealing performance according to claim 2, wherein: The locking component includes a seal seat and several screws; The seal seat is sleeved on the cooling ring and is installed on the feeding seal cover assembly or the discharging seal cover assembly through the screws.

4. A rotary kiln with high sealing performance according to claim 3, characterized in that: The locking component further includes a first axial elastic pressing ring, a second axial elastic pressing ring and two spacer rings. There are two sealing packings; Both of the two sealing packings are sleeved on the cooling ring. The bottom of one of the sealing packings is closely attached to the seal seat. One of the spacer rings is arranged between the two sealing packings. The other spacer ring is closely attached to the top of the other sealing packing. The bottom of the first axial elastic pressing ring is closely attached to the other spacer ring. The bottom of the second axial elastic pressing ring is closely attached to the seal seat. The top of the first axial elastic pressing ring is installed on the top of the second axial elastic pressing ring through the screws.

5. The high-sealing rotary kiln according to claim 4, characterized in that: The locking component further includes two radial elastic pressing rings. The two radial elastic pressing rings are respectively installed on the corresponding sealing packings through the screws passing through the second axial elastic pressing ring.

6. The high-sealing rotary kiln according to claim 1, wherein: The feeding mechanism includes a screw feeding component, a feeding hopper, a feeding pipe and a control valve; The feeding hopper and the feeding pipe are arranged vertically. The control valve is installed between the feeding hopper and the feeding pipe. The feeding pipe is communicated with the screw feeding component.

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