Sealing device for waste tire regeneration rotary kiln

Abstract

The invention relates to the technical field of rotary kiln sealing, in particular to a sealing device for a waste tire regeneration rotary kiln, which comprises a kiln body, a screw conveyor for feeding materials into the kiln body and a material receiving device for receiving the materials in the kiln body, a feeding cover on the screw conveyor extends into the kiln body, and a sleeve is welded on the feeding cover; a discharging cover stretching into the material collecting device is welded to the end, close to the material collecting device, of the kiln body, and the sleeve and the discharging cover are each sleeved with a sealing mechanism. According to the sealing device, the sealing flexible connecting piece and the supporting assembly are arranged, so that the whole fixing ring frame can be driven to rotate through the sealing flexible connecting piece and the supporting assembly when the kiln body rotates, and in addition, the packing is fixed to the feeding cover through the steel wire rope, so that the rotation of the packing is small; according to the utility model, the axial and radial displacement of the kiln body in the rotation process is avoided, a certain force is applied to the packing, and the packing is stressed and deformed, so that the influence of the displacement on the sealing is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of rotary kiln sealing, in particular to a sealing device for a waste tire regeneration rotary kiln. Background Art

[0002] As the number of waste tires, known as "black pollution", increases year by year, their reasonable disposal has become an urgent global environmental issue. As one of the key equipment for waste tire treatment, the performance of the sealing device of the rotary kiln directly affects the efficiency and quality of the entire treatment process. Traditional sealing devices mostly use fish scale seals, cylinder seals, graphite block seals, labyrinth seals, baffle seals, etc., which have various defects and cannot meet the increasingly stringent process requirements.

[0003] For example, the drum will expand to a certain extent when running at high temperature, and the inevitable axial and radial displacements during the rotation will exert a certain force on the packing. Considering that the packing itself has poor elasticity and cannot recover after being deformed by force, the sealing of the kiln body is affected. Summary of the invention

[0004] In view of this, the purpose of the present invention is to propose a sealing device for a waste tire recycling rotary kiln to solve the problem that when sealing with packing, the rotary kiln is prone to radial or axial displacement during rotation, which will exert a certain force on the packing, causing the packing to deform, and the packing has poor elasticity and cannot recover after being deformed by force, thereby reducing the sealing performance of the packing.

[0005] Based on the above purpose, the present invention provides a sealing device for a waste tire recycling rotary kiln, comprising a kiln body, a screw conveyor for feeding materials into the kiln body, and a material receiving device for receiving materials in the kiln body, wherein a feeding cover on the screw conveyor extends into the kiln body, and a sleeve is welded on the feeding cover, and a discharging cover extending into the material receiving device is welded on one end of the kiln body close to the material receiving device, and a sealing mechanism is sleeved on the sleeve and the discharging cover, and the sealing mechanism is used to seal the contact between the kiln body and the screw conveyor and the contact between the kiln body and the material receiving device;

[0006] A conical flange is installed on one end of the kiln body close to the sleeve and on one side of the material receiving device close to the kiln body. The sealing mechanism includes a fixed ring frame sleeved on the sleeve or on the discharge cover, a sealing flexible connector is arranged between the fixed ring frame and the conical flange, a packing is arranged in the fixed ring frame, a pull rope assembly for tightening and fixing the packing is arranged on the fixed ring frame, and a support assembly for axially and radially limiting the packing is also hinged on the fixed ring frame.

[0007] Preferably, the fixed ring frame includes two outer ring frames and one inner ring frame, and the inner ring frame is located between the two outer ring frames.

[0008] Preferably, the sealing flexible connector is a bellows, one end of the bellows is connected to the outer ring frame, and the other end of the bellows is connected to the conical flange.

[0009] Preferably, the support assembly includes a plurality of axial connecting rods and radial connecting rods, one end of the axial connecting rod is hinged to the inner ring frame, the other end of the axial connecting rod is hinged to the end of the kiln body or the material collecting device, the kiln body or the material collecting device is fixedly connected with a support rod, one end of the radial connecting rod is hinged to the inner ring frame, and the radial connecting rod is hinged to the support rod through a hinge seat.

[0010] Preferably, the inner ring frame is provided with a plurality of slots, and a frame is installed in the slots, a guide wheel is rotatably connected in the frame, and an arc-shaped cover for shielding the guide wheel is fixedly connected to the frame.

[0011] Preferably, the packing is installed in an outer ring frame, wherein each outer ring frame is provided with two groups of front-to-back symmetrical pull rope assemblies.

[0012] Preferably, the pull rope assembly includes a steel wire rope wound on the packing, and the two ends of the steel wire rope are placed crosswise, so that when the two ends of the steel wire rope are pulled, the steel wire rope can tighten and fix the packing to achieve that the packing is tightly attached to the casing or the discharge cover.

[0013] Preferably, the pull rope assembly also includes a plurality of connecting tubes fixedly connected to the outer ring frame, the end of the connecting tube is provided with a hole, and a screw is movably inserted in the hole, one end of the screw extends into the connecting tube and is connected to the end of the wire rope, a nut is threadedly connected to the screw, a spring is sleeved on the screw, one end of the spring is abutted against the connecting tube, and the other end of the spring is abutted against the nut.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. By using sealing flexible connectors to make soft connections between the fixed ring frame and the feed cover and the discharge cover, and setting up support components, the entire fixed ring frame can be driven to rotate through the sealing flexible connector and the support components when the kiln body rotates. In addition, since the packing is fixed to the feed cover by pressing the steel wire rope, the rotation of the packing will be relatively small. It is mainly through the support component that the sealed shell is driven to rotate (that is, the fixed ring frame is driven to rotate), which reduces the rotation of the kiln body and drives the packing to rotate, causing certain friction damage to the packing.

[0016] 2. The kiln body will have an axial deformation when it expands due to heat. The sealing flexible connector can offset this axial force with the deformation. At the same time, the supporting assembly can swing back and forth to reduce the radial pressure and avoid axial and radial displacement of the kiln body during the thermal expansion process. A certain force is applied to the packing, causing the packing to deform under force, thereby reducing the impact of the displacement on the seal. The synergistic effect of various parts ensures the dynamic balance of the sealing device and the cylinder, which can adapt to the operation of the rotary kiln under different working conditions, reduce air leakage, material leakage and other phenomena, and effectively improve the sealing performance and durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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 embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0019] Figure 2 It is an enlarged view of the structure at A of the embodiment of the present invention;

[0020] Figure 3 It is an enlarged view of the structure at B of the embodiment of the present invention;

[0021] Figure 4 A cross-sectional view of a sleeve, a sealing mechanism and a kiln body according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of a fixed ring frame and a support assembly according to an embodiment of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the pull rope assembly and the packing according to an embodiment of the present invention.

[0024] In the figure: 1. screw conveyor; 2. kiln body; 3. material collecting device; 4. casing; 5. discharge cover; 6. conical flange; 7. fixed ring frame; 8. packing; 9. outer ring frame; 10. inner ring frame; 11. bellows; 12. axial connecting rod; 13. radial connecting rod; 14. support rod; 15. guide wheel; 16. arc cover; 17. wire rope; 18. connecting tube; 19. screw; 20. nut; 21. spring. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0026] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connecting" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, a sealing device for a waste tire recycling rotary kiln comprises a kiln body 2, a screw conveyor 1 for feeding materials into the kiln body 2, and a material receiving device 3 for receiving materials in the kiln body 2, a feeding cover on the screw conveyor 1 extends into the kiln body 2, and a sleeve 4 is welded on the feeding cover, and a discharging cover 5 extending into the material receiving device 3 is welded on one end of the kiln body 2 close to the material receiving device 3, and a sealing mechanism is sleeved on the sleeve 4 and the discharging cover 5, and the sealing mechanism is used to seal the contact between the kiln body 2 and the screw conveyor 1 and the contact between the kiln body 2 and the material receiving device 3;

[0028] A conical flange 6 is installed on one end of the kiln body 2 close to the sleeve 4 and on the side of the collecting device 3 close to the kiln body 2. The sealing mechanism includes a fixed ring frame 7 sleeved on the sleeve 4 or on the discharge cover 5, and there is a gap between the conical flange 6 and the fixed ring frame 7. A sealing soft connector is arranged between the fixed ring frame 7 and the conical flange 6. A packing 8 is arranged in the fixed ring frame 7. The fixed ring frame 7 is provided with a pull rope assembly for tightening and fixing the packing 8. The kiln body 2 and the collecting device 3 are both hinged with a support assembly for supporting the fixed ring frame 7 and the packing 8.

[0029] When the sealing mechanism seals the kiln body 2 and the feed hood, the sealing mechanism is connected to the conical flange 6 and the support assembly connected to the kiln body 2 through the sealing soft connector. When the kiln body 2 produces a certain expansion when operating at high temperature, and produces axial and radial displacements during rotation, the soft connection of the sealing soft connector can offset the axial force with the deformation, and there is a gap between the fixed ring frame 7 and the conical flange 6 to provide sufficient deformation space. At the same time, the hinged support assembly can swing back and forth to reduce radial pressure, thereby avoiding squeezing the packing 8 when the kiln body 2 is displaced or shaken, thereby improving the service life and sealing effect of the packing 8.

[0030] When the sealing mechanism seals the kiln body 2 and the discharge cover 5, the sealing mechanism is connected to the conical flange 6 and the support assembly connected to the receiving device 3 through the sealing soft connector. When the kiln body 2 produces a certain expansion when operating at high temperature, and produces axial and radial displacements during rotation, the soft connection of the sealing soft connector can follow the deformation to offset the axial force, and there is a gap between the fixed ring frame 7 and the conical flange 6, so as to provide sufficient deformation space. At the same time, the hinged support assembly can swing back and forth to reduce radial pressure.

[0031] In a preferred embodiment of the present invention, the fixed ring frame 7 includes two outer ring frames 9 and an inner ring frame 10, and the inner ring frame 10 is located between the two outer ring frames 9. The outer ring frames 9 and the inner ring frame 10 can be composed of circular rings and annular plates connected at both ends of the circular rings.

[0032] In another preferred embodiment of the present invention, the sealing flexible connector is a bellows 11, one end of the bellows 11 is connected to the outer ring frame 9, and the other end of the bellows 11 is connected to the conical flange 6. The bellows 11 is elastic and flexible. When the kiln body 2 shakes or displaces, the bellows 11 can deform along with the kiln body 2 to offset the axial force, thereby avoiding the force generated by the shaking or displacement of the kiln body 2 directly acting on the packing, causing the packing 8 to deform and affecting the sealing effect of the packing 8.

[0033] In another preferred embodiment of the present invention, the support assembly includes a plurality of axial connecting rods 12 and radial connecting rods 13, one end of the axial connecting rod 12 is hinged to the inner ring frame 10, the other end of the axial connecting rod 12 is hinged to the end of the kiln body 2 or the material collecting device 3, a support rod 14 is fixedly connected to the kiln body 2 or the material collecting device 3, one end of the radial connecting rod 13 is hinged to the inner ring frame 10, and the radial connecting rod 13 is hinged to the support rod 14 through a hinge seat.

[0034] When the kiln body 2 is axially displaced, the bellows 11 can deform along with the kiln body 2 to offset the axial force, and part of the axial force will be transferred to the support rod 14, and the support rod 14 is hinged to the fixed ring frame 7 through the radial connecting rod 13, so when the support rod 14 is slightly displaced axially, it will not affect the fixed ring frame 7, and the kiln body 2 will have a small displacement when axial displacement occurs. When the kiln body 2 is slightly displaced radially, the radial connecting rod 13 and the axial connecting rod 12 shake with each other, reducing the radial pressure on the fixed ring frame 7 and the packing 8.

[0035] It should be noted that a number of slots are provided on the inner ring frame 10, and a frame is installed in the slots, a guide wheel 15 is rotatably connected in the frame, and an arc cover 16 for shielding the guide wheel 15 is fixedly connected to the frame. The guide wheel 15 plays a role of guiding and reducing friction, and the arc cover 16 plays a sealing role for the guide wheel 15 to ensure that the entire sealing mechanism will not leak.

[0036] It should be noted that the packing 8 is installed in the outer ring frame 9, and each outer ring frame 9 is provided with two groups of front-to-back symmetrical pull rope assemblies, the pull rope assembly includes a steel wire rope 17 wound on the packing 8, and a slide groove for placing the steel wire rope 17 is opened on the packing 8, and a plurality of balls are rolled in the slide groove, and the two ends of the steel wire rope 17 are placed crosswise, so that when the two ends of the steel wire rope 17 are pulled, the steel wire rope 17 can tighten and fix the packing 8 to achieve the packing 8 is close to the sleeve 4 or the discharge cover 5, and the pull rope assembly also includes a plurality of connecting tubes 18 fixedly connected to the outer ring frame 9. A hole is opened at the end of the connecting tube 18, and a screw 19 is movably inserted in the hole. One end of the screw 19 extends into the connecting tube 18 and is connected to the end of the wire rope 17. A nut 20 is threadedly connected to the screw 19. A spring 21 is sleeved on the screw 19, and one end of the spring 21 abuts against the connecting tube 18, and the other end of the spring 21 abuts against the nut 20.

[0037] When the packing 8 needs to be tightened, the two screws 19 are pulled to pull the rope ends of the two cross-placed wire ropes 17 so that the wire ropes 17 can tighten and fix the packing 8 to achieve that the packing 8 is close to the casing 4 or the discharge cover 5, and then the nut 20 is tightened to limit the pulled screw 19, so that the wire rope 17 can tighten the packing 8 well, and the spring 21 sleeved on the screw 19 plays a role of elastic buffer. In addition, since the packing 8 is fixed to the feed cover by the wire rope 17, when the kiln body 2 drives the fixed ring frame 7 to rotate, the wire rope 17 will rotate around the packing 8, so the rotation of the packing 8 will be relatively small, mainly through the axial connecting rod 12 and the radial connecting rod 13 to drive the sealed shell to rotate (that is, drive the fixed ring frame 7 to rotate), reducing the rotation of the kiln body 2 and driving the packing 8 to rotate, causing certain friction damage to the packing 8.

[0038] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0039] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing device for a waste tire recycling rotary kiln, comprising a kiln body (2), a screw conveyor (1) for feeding materials into the kiln body (2), and a material receiving device (3) for receiving materials in the kiln body (2), wherein a feed cover on the screw conveyor (1) extends into the kiln body (2), and a sleeve (4) is welded to the feed cover, and a discharge cover (5) extending into the material receiving device (3) is welded to one end of the kiln body (2) close to the material receiving device (3), wherein: The sleeve (4) and the discharge cover (5) are both provided with sealing mechanisms, and the sealing mechanisms are used to seal the contact points between the kiln body (2) and the screw conveyor (1) and the contact points between the kiln body (2) and the material receiving device (3); A conical flange (6) is installed on one end of the kiln body (2) close to the sleeve (4) and on one side of the material receiving device (3) close to the kiln body (2); the sealing mechanism comprises a fixed ring frame (7) sleeved on the sleeve (4) or sleeved on the material discharge cover (5); a gap is provided between the conical flange (6) and the fixed ring frame (7); a sealing flexible connector is provided between the fixed ring frame (7) and the conical flange (6); a packing (8) is provided inside the fixed ring frame (7); a pull rope assembly for tightening and fixing the packing (8) is provided on the fixed ring frame (7); and a support assembly for supporting the fixed ring frame (7) and the packing (8) is hinged on the kiln body (2) and the material receiving device (3).

2. The sealing device for a waste tire regeneration rotary kiln according to claim 1, characterized in that: The fixed ring frame (7) comprises two outer ring frames (9) and an inner ring frame (10), and the inner ring frame (10) is located between the two outer ring frames (9).

3. The sealing device for a waste tire regeneration rotary kiln according to claim 2, characterized in that: The sealing flexible connection part is a bellows (11), one end of the bellows (11) is connected to the outer ring frame (9), and the other end of the bellows (11) is connected to the conical flange (6).

4. The sealing device for a waste tire regeneration rotary kiln according to claim 2, characterized in that: The support assembly comprises a plurality of axial connecting rods (12) and radial connecting rods (13), one end of the axial connecting rod (12) is hinged on the inner ring frame (10), the other end of the axial connecting rod (12) is hinged on the end of the kiln body (2) or the material receiving device (3), the kiln body (2) or the material receiving device (3) is fixedly connected with a support rod (14), one end of the radial connecting rod (13) is hinged on the inner ring frame (10), and the radial connecting rod (13) is hinged on the support rod (14) through a hinge seat.

5. The sealing device for a waste tire regeneration rotary kiln according to claim 2, characterized in that: The inner ring frame (10) is provided with a plurality of slots, and a frame is installed in the slots. A guide wheel (15) is rotatably connected in the frame, and an arc-shaped cover (16) for shielding the guide wheel (15) is fixedly connected to the frame.

6. The sealing device for a waste tire regeneration rotary kiln according to claim 2, characterized in that: The packing (8) is installed in the outer ring frame (9), wherein each outer ring frame (9) is provided with two groups of front-to-back symmetrical pull rope assemblies.

7. The sealing device for a waste tire regeneration rotary kiln according to claim 6, characterized in that: The pull rope assembly comprises a steel wire rope (17) wound around a packing (8), and the two ends of the steel wire rope (17) are placed crosswise, so that when the two ends of the steel wire rope (17) are pulled, the steel wire rope (17) can tighten and fix the packing (8), so that the packing (8) is tightly attached to the sleeve (4) or the discharge cover (5).

8. The sealing device for a waste tire regeneration rotary kiln according to claim 7, characterized in that: The pull rope assembly also includes a plurality of connecting tubes (18) fixedly connected to the outer ring frame (9), the end of the connecting tube (18) is provided with a hole, and a screw rod (19) is movably inserted in the hole, one end of the screw rod (19) extends into the connecting tube (18) and is connected to the end of the wire rope (17), a nut (20) is threadedly connected to the screw rod (19), a spring (21) is sleeved on the screw rod (19), one end of the spring (21) is in contact with the connecting tube (18), and the other end of the spring (21) is in contact with the nut (20).

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