Rotary kiln sealing mechanism and system

Abstract

The invention relates to the technical field of rotary kilns, in particular to a rotary kiln sealing mechanism and system, and aims at solving the problem that an existing sealing structure is insufficient in sealing effect. The rotary kiln sealing mechanism comprises a sealing assembly and a pressurizing assembly. The sealing assembly comprises a static sealing ring, a movable sealing ring and a sealing ring; the static sealing ring and the movable sealing ring are coaxially arranged and define an annular containing groove, and the annular containing groove is sleeved with the sealing ring. The movable sealing ring is connected with the rotary kiln cylinder; the sealing ring is provided with a cavity, and a cooling circulating medium is introduced into the cavity; the pressurizing assembly comprises a pressurizing rope, and the pressurizing rope is wound around the outer circle of the sealing ring to extrude the sealing ring. A cooling circulation medium is introduced into the sealing ring, so that the conditions that the sealing performance of the sealing ring is reduced due to too high temperature and the sealing performance is reduced due to thermal deformation of the static sealing ring and the movable sealing ring are avoided. The pressurization rope is wound to extrude the sealing ring to enable the sealing ring to deform under pressure, so that the annular containing groove is fully filled, and reliable sealing of the contact face of the static sealing ring and the movable sealing ring is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of rotary kilns, and in particular to a rotary kiln sealing mechanism and system. Background Art

[0002] The sealing of rotary kiln plays an extremely important role. Good sealing can prevent heat loss, facilitate the full reaction and calcination of materials, improve production efficiency and product quality; secondly, it can stabilize the airflow in the kiln, make the material and gas fully contact, improve heat exchange efficiency; and reduce energy consumption, reduce the entry of cold air to lower the temperature in the kiln, thereby reducing the fuel consumption required to maintain the temperature; in addition, it can prevent material leakage and reduce dust emissions, improve the working environment, and help enterprises meet environmental emission standards.

[0003] At present, the rotary kiln sealing technology mainly uses the technology of cylinder pressing the dynamic and static sealing rings. Considering the thermal expansion and contraction, movement, bending, radial runout and other factors of the rotary kiln cylinder, the gap between the dynamic and static sealing rings will become larger, resulting in unsatisfactory sealing effect, and serious air leakage and material leakage. After long-term use, it can only play a certain blocking role for larger particles, but finer particles and dust can still overflow through the gap between the dynamic and static sealing rings. When the particles are finer, the leakage phenomenon is more obvious. If more oxygen enters the kiln through the gap between the dynamic and static sealing rings, the reduced product is easy to oxidize, affecting the quality of the material in the kiln. Summary of the invention

[0004] The object of the present invention is to provide a rotary kiln sealing mechanism and system to solve the problem of insufficient sealing effect of the existing sealing structure.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is: A rotary kiln sealing mechanism comprises a sealing component and a pressurizing component; The sealing assembly comprises a static sealing ring, a dynamic sealing ring and a sealing ring; The static sealing ring and the dynamic sealing ring are coaxially arranged and enclose an annular receiving groove, and the sealing ring is sleeved in the annular receiving groove; the dynamic sealing ring is connected to the rotary kiln cylinder; the sealing ring is provided with a cavity, and a cooling circulating medium is passed into the cavity; The pressurizing component comprises a pressurizing rope, and the pressurizing rope is wound around the outer circle of the sealing ring to press the sealing ring.

[0006] In some optional embodiments, the pressurizing assembly further includes a counterweight block, wherein the counterweight block is connected to an end of the pressurizing rope so that the pressurizing rope squeezes the sealing ring.

[0007] In some optional embodiments, the pressurizing assembly further comprises a rope bracket, and a plurality of the rope brackets are evenly distributed around the axis of the sealing ring; The rope support is connected to the sealing ring, and the pressurizing rope sequentially passes through the through holes on each of the rope supports.

[0008] In some alternative embodiments, the pressurizing rope is provided as a steel wire rope.

[0009] In some alternative embodiments, the sealing ring is made of a rubber hose with fabric.

[0010] In some alternative embodiments, the rotary kiln sealing mechanism further includes a pressing assembly, and the pressing assembly includes a pressing rod, a sleeve and a spring; The pressing rod is inserted into the sleeve and is slidably connected to the sleeve; The spring is sleeved on the pressing rod and is inserted into the sleeve, and is used to apply a thrust to the pressing rod so that the pressing rod presses the static sealing ring against the dynamic sealing ring.

[0011] In some alternative embodiments, the pressing assembly further includes a setscrew, a first retaining piece and a second retaining piece; The setscrew is inserted into the sleeve and is threadedly connected to the sleeve; One end of the first retaining piece abuts against the setscrew, and the other end abuts against the spring; One end of the second retaining piece abuts against the pressing rod, and the other end abuts against the end of the spring away from the first retaining piece.

[0012] In some alternative embodiments, the rotary kiln sealing mechanism further includes a mounting assembly, and the mounting assembly includes a fixed ring plate and a movable ring plate; A plurality of the pressing assemblies are evenly distributed around the axis of the fixed ring plate and are mounted on the fixed ring plate; The movable ring plate is connected to the static sealing ring, and the pressing rod abuts against the movable ring plate; A connecting shaft is provided on the movable ring plate, and a long groove extending along the axis of the fixed ring plate is formed on the fixed ring plate; the connecting shaft is inserted into the long groove and can slide along the long groove and / or rotate around its own axis.

[0013] In some alternative embodiments, the mounting assembly further includes a bellows expansion joint; The fixed ring plate is sleeved on the connecting cylinder and is connected to the connecting cylinder; the movable ring plate is sleeved on the connecting cylinder and is slidably connected to the connecting cylinder; The bellows expansion joint is sleeved on the connecting cylinder, one end is connected to the fixed ring plate, and the other end is connected to the movable ring plate.

[0014] On the other hand, the present invention proposes a rotary kiln sealing system, including the above-mentioned rotary kiln sealing mechanism.

[0015] In summary of the above technical solutions, the technical effects that can be achieved by the present invention are as follows: The rotary kiln sealing mechanism provided by the present invention includes a sealing assembly and a pressurizing assembly; the sealing assembly includes a static sealing ring, a dynamic sealing ring, and a sealing ring; the static sealing ring and the dynamic sealing ring are coaxially arranged and enclose an annular accommodating groove, and the sealing ring is sleeved in the annular accommodating groove; the dynamic sealing ring is connected to the rotary kiln cylinder body; the sealing ring is provided with a cavity, and a cooling circulating medium is introduced into the cavity; the pressurizing assembly includes a pressurizing rope, and the pressurizing rope is wound around the outer circle of the sealing ring to squeeze the sealing ring.

[0016] The rotary kiln sealing mechanism provided by the present invention avoids the situation that the sealing performance of the sealing ring decreases due to excessive temperature and the sealing performance decreases due to the heat deformation of the static sealing ring and the dynamic sealing ring by introducing a cooling circulating medium into the sealing ring. At the same time, the pressurizing rope is wound to squeeze the sealing ring so that the sealing ring is deformed under pressure, thereby fully filling the annular accommodating groove and realizing reliable sealing of the contact surface between the sealing ring and the static sealing ring and the dynamic sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of the rotary kiln sealing mechanism provided by the embodiment of the present invention; Figure 2 It is a three-dimensional view of the rotary kiln sealing mechanism provided by the embodiment of the present invention; Figure 3 It is another schematic diagram of the rotary kiln sealing mechanism provided by the embodiment of the present invention; Figure 4 It is a schematic structural diagram of the pressing assembly.

[0019] Reference numerals: 100, sealing assembly; 110, static sealing ring; 120, dynamic sealing ring; 130, sealing ring; 200, pressurizing assembly; 210, pressurizing rope; 220, counterweight; 230, rope bracket; 240, pulley; 300, pressing assembly; 310, pressing rod; 320, sleeve; 330, spring; 340, setscrew; 350, first retaining piece; 360, second retaining piece; 400, mounting assembly; 410, fixed ring plate; 420, movable ring plate; 430, bellows expansion joint; 10, rotary kiln cylinder body; 20, connecting cylinder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0023] At present, the rotary kiln sealing technology mainly uses the technology of cylinder pressing the dynamic and static sealing rings. Considering the thermal expansion and contraction, movement, bending, radial runout and other factors of the rotary kiln cylinder, the gap between the dynamic and static sealing rings will become larger, resulting in unsatisfactory sealing effect, and serious air leakage and material leakage. After long-term use, it can only play a certain blocking role for larger particles, but finer particles and dust can still overflow through the gap between the dynamic and static sealing rings. When the particles are finer, the leakage phenomenon is more obvious.

[0024] In view of this, the present invention provides a rotary kiln sealing mechanism, including a sealing component 100 and a pressurizing component 200; the sealing component 100 includes a static sealing ring 110, a dynamic sealing ring 120 and a sealing ring 130; the static sealing ring 110 and the dynamic sealing ring 120 are coaxially arranged and form an annular accommodating groove, and the sealing ring 130 is sleeved in the annular accommodating groove; the dynamic sealing ring 120 is connected to the rotary kiln cylinder 10; the sealing ring 130 is provided with a cavity, and a cooling circulating medium is passed into the cavity; the pressurizing component 200 includes a pressurizing rope 210, and the pressurizing rope 210 is wound around the outer circle of the sealing ring 130 to squeeze the sealing ring 130.

[0025] The rotary kiln sealing mechanism provided by the present invention passes a cooling circulating medium into the sealing ring 130 to avoid the situation where the sealing performance of the sealing ring 130 is reduced due to excessive temperature and the static sealing ring 110 and the dynamic sealing ring 120 are deformed due to heat. At the same time, the pressure rope 210 is wound to squeeze the sealing ring 130 to deform the sealing ring 130 under pressure, thereby fully filling the annular receiving groove, and realizing reliable sealing of the contact surface of the static sealing ring 110 and the dynamic sealing ring 120 by the sealing ring 130.

[0026] The following will combine with Figures 1-4 to elaborate in detail on the structure and shape of the rotary kiln sealing mechanism provided in this embodiment: In an alternative solution of this embodiment, annular protrusions are provided on both sides of the static sealing ring 110 and the dynamic sealing ring 120 that face each other. The two annular protrusions come into contact with each other to form a preliminary seal and constitute the bottom of the annular accommodating groove, as Figure 1 shown. The setting of the annular protrusions can reduce the contact area between the static sealing ring 110 and the dynamic sealing ring 120, thereby reducing the heat concentration caused by the friction between the dynamic sealing ring 120 driven by the rotary kiln cylinder 10 to rotate around its own axis and the static sealing ring 110, avoiding too rapid local temperature rise, and further avoiding the aggravation of friction heat generation caused by temperature rise-induced deformation, etc.; at the same time, it can also cause the annular protrusions to gradually wear, with a smooth running-in process. As the wear intensifies, the contact area between the two annular protrusions gradually increases to a set value and then they are replaced to ensure smooth friction and sealing effect on the contact surface between the two. If a large contact surface is adopted, it is difficult to ensure sufficient running-in between the two, and further, due to the unevenness of the contact surface, the wear and friction heat generation will be aggravated.

[0027] Furthermore, the cross-section of the annular protrusion is semi-circular, that is, the contact surfaces of the two circular annular protrusions are tangent to each other, being line contact.

[0028] In some alternative embodiments, the sealing ring 130 is made of a rubber hose with fabric reinforcement. The rubber hose with fabric reinforcement is formed into a ring shape, and the internal cavity can be set as an annular cavity or a linear cavity. When the cavity is annular, the outlets and inlets of the cooling circulating medium are evenly distributed around the axis of the ring; when the cavity is linear, the outlets and inlets of the cooling circulating medium are located at both ends of the line.

[0029] In an alternative solution of this embodiment, the cooling circulating medium can be set as water, gas, evaporation cooling medium, etc.

[0030] In an alternative solution of this embodiment, the rotary kiln sealing mechanism further includes a cooling circulation assembly. The cooling circulation assembly includes a circulation pump and a radiator. The circulation pump drives the cooling circulating medium to flow through the circulation pump, the sealing ring 130, and the radiator in sequence. The radiator is used to reduce the temperature of the cooling circulating medium.

[0031] In some alternative embodiments, the pressurizing assembly 200 further includes a counterweight 220. The counterweight 220 is connected to the end of the pressurizing rope 210 to make the pressurizing rope 210 extrude the sealing ring 130, ensuring continuous and stable pressure, so that the deformation of the sealing ring 130 can adapt to the changes in the sealing requirements and ensure the sealing effect.

[0032] In some alternative embodiments, the pressurizing assembly 200 further includes a rope support 230. A plurality of rope supports 230 are evenly distributed around the axis of the sealing ring 130, as Figure 3As shown; the rope bracket 230 is connected to the sealing ring 130, and the pressure rope 210 passes through the through holes on each rope bracket 230 in sequence, so as to ensure that the pressure rope 210 can stably press the sealing ring 130 and avoid unstable extrusion effect on the sealing ring 130.

[0033] Specifically, the rope bracket 230 includes a pressure plate and a connecting plate, and the pressure plate is connected to the connecting plate. A through hole for inserting the pressure rope 210 is provided on the connecting plate; the pressure plate is set to be arc-shaped, and the cross section is set to be semi-circular, so as to fit well with the sealing ring 130 to guide the deformation of the sealing ring 130, so that the sealing ring 130 deforms towards the bottom of the annular accommodating groove, so as to fully contact the static sealing ring 110 and the dynamic sealing ring 120, achieve good sealing, and avoid the sealing effect from decreasing due to the deformation of the sealing ring 130 along the direction away from the axis of the sealing ring 130 after being pressed by the pressure rope 210. Specifically, the deformation of the sealing ring 130 along the direction away from the axis of the sealing ring 130 means that a groove is formed on the outer circle of the sealing ring 130 in contact with the pressure rope 210 to wrap the pressure rope 210.

[0034] In an alternative embodiment of the present embodiment, the pressing assembly 200 further includes a pulley 240, the pulley 240 can rotate around its own axis, and the pressure rope 210 bypasses the pulley 240 so that the force application direction of the pressure rope 210 is fixed. A groove is provided on the outer periphery of the pulley 240 to limit the pressure rope 210 to prevent the pressure rope 210 from coming off.

[0035] In an alternative embodiment of the present embodiment, the pressing assembly 200 further includes a guide rod, and the guide rod is inserted into the counterweight 220 and slidably connected to the counterweight 220, so as to guide the counterweight 220 to move in the vertical direction and avoid the counterweight 220 from shaking.

[0036] In some alternative embodiments, the pressure rope 210 is set as a steel wire rope to ensure its own strength.

[0037] In some alternative embodiments, the rotary kiln sealing mechanism further includes a pressing assembly 300, and the pressing assembly 300 includes a pressure rod 310, a sleeve 320 and a spring 330, as Figure 4 shown. In the figure, the spring 330 is a complete spring 330, and the blank part in the middle is the omitted part. The pressure rod 310 is inserted into the sleeve 320 and slidably connected to the sleeve 320; the spring 330 is sleeved on the pressure rod 310 and inserted into the sleeve 320, and is used to apply a thrust to the pressure rod 310 so that the pressure rod 310 presses the static sealing ring 110 against the dynamic sealing ring 120.

[0038] Specifically, the pressing assembly 300 further includes a setscrew 340, a first retaining piece 350, and a second retaining piece 360; the setscrew 340 is inserted into the sleeve 320 and threadedly connected to the sleeve 320; one end of the first retaining piece 350 abuts against the setscrew 340, and the other end abuts against the spring 330; one end of the second retaining piece 360 abuts against the pressing rod 310, and the other end abuts against the end of the spring 330 away from the first retaining piece 350. That is, the elastic force of the spring 330 causes the pressing rod 310 to push the static sealing ring 110, so that the static sealing ring 110 and the dynamic sealing ring 120 are kept in an abutting state to form a seal; at the same time, the annular accommodating groove formed by the static sealing ring 110 and the dynamic sealing ring 120 is kept structurally stable, restricting the deformation of the sealing ring 130 under the extrusion of the pressure rope 210 and making the sealing ring 130 and the static sealing ring 110, the dynamic sealing ring 120 keep in an abutting state to form a good seal. In addition, by rotating the setscrew 340, the initial compression amount of the spring 330 can be adjusted to select an appropriate pressure.

[0039] In some alternative embodiments, the rotary kiln sealing mechanism further includes a mounting assembly 400, and the mounting assembly 400 includes a fixed ring plate 410 and a movable ring plate 420 sleeved on the connecting cylinder 20; a plurality of pressing assemblies 300 are evenly distributed around the axis of the fixed ring plate 410 and mounted on the fixed ring plate 410; the movable ring plate 420 is connected to the static sealing ring 110 and can slide along its own axis direction, and the pressing rod 310 abuts against the movable ring plate 420 to apply a thrust force to the static sealing ring 110 through the movable ring plate 420. In this embodiment, the movable ring plate 420, the static sealing ring 110, the dynamic sealing ring 120, the connecting cylinder 20, and the rotary kiln cylinder 10 are coaxially arranged.

[0040] Further, a connecting shaft is provided on the movable ring plate 420, and a long groove extending along the axis direction of the fixed ring plate 410 is formed on the fixed ring plate 410; the connecting shaft is inserted into the long groove and can slide along the long groove and / or rotate around its own axis. Specifically, two connecting shafts are respectively arranged on both sides of the movable ring plate 420, the axis of the connecting shaft is vertically intersecting and horizontally arranged with the axis of the movable ring plate 420; a sliding groove plate extending along the axis direction of the fixed ring plate 410 is provided on the fixed ring plate 410, two sliding groove plates are arranged on both sides of the fixed ring plate 410 and correspond to the connecting shafts one by one, and the long groove is formed on the sliding groove plate.

[0041] When the rotary kiln shell 10 undergoes axial movement, swinging of its own axis in the vertical plane, etc. due to factors such as aging and wear, the connecting shaft can slide or roll along the long groove, enabling the static seal ring 110 to perform axial displacement and swinging along with the dynamic seal ring 120 while ensuring that its height remains unchanged. Thus, the sealing state between the static seal ring 110 and the dynamic seal ring 120 and the close contact with the sealing ring 130 are ensured, avoiding seal failure. That is, when the dynamic seal ring 120 swings and moves along with the rotary kiln shell 10 while the static seal ring 110 is fixedly arranged, the distance between the dynamic seal ring 120 and the static seal ring 110 changes. When the change in distance exceeds the compensation margin or compensation speed of the sealing ring 130, the situation of poor sealing will occur. It should be noted that at this time, the end of the pressure rod 310 in contact with the moving ring plate 420 is set as a spherical head, that is, the contact between the pressure rod 310 and the moving ring plate 420 is a point contact, so as to ensure that the moving ring plate 420 can swing along with the dynamic seal ring 120.

[0042] In an alternative embodiment of the present embodiment, the rotary kiln sealing mechanism further includes an installation assembly 400. The installation assembly 400 includes a fixed ring plate 410 and a moving ring plate 420 sleeved on the connecting cylinder 20; a plurality of pressing assemblies 300 are evenly distributed around the axis of the fixed ring plate 410 and installed on the fixed ring plate 410; the moving ring plate 420 is connected to the static seal ring 110 and can slide along its own axis direction. The end of the pressure rod 310 is hinged to the moving ring plate 420 to apply a thrust to the static seal ring 110 through the moving ring plate 420. At this time, the moving ring plate 420 is fixed in height through the pressure rod 310. At this time, only the position change caused by the axial movement of the rotary kiln shell 10 can be compensated, and the contact state between the static seal ring 110 and the dynamic seal ring 120 is maintained. In this embodiment, the moving ring plate 420, the static seal ring 110, the dynamic seal ring 120, the connecting cylinder 20, and the rotary kiln shell 10 are coaxially arranged.

[0043] In some alternative embodiments, the installation component 400 further includes a corrugated expansion joint 430; the fixed ring plate 410 is sleeved on the connecting cylinder 20 and connected to the connecting cylinder 20; the movable ring plate 420 is sleeved on the connecting cylinder 20 and slidably connected to the connecting cylinder 20; the corrugated expansion joint 430 is sleeved on the connecting cylinder 20, one end is connected to the fixed ring plate 410, and the other end is connected to the movable ring plate 420, so as to seal the gap between the movable ring plate 420 and the connecting cylinder 20 through the fixed ring plate 410 and the corrugated expansion joint 430. When the rotary kiln cylinder 10 has an axial displacement or undergoes axial thermal expansion due to heating, the corrugated expansion joint 430 and the pressing component 300 act simultaneously to maintain the sealing effect. At this time, the dynamic sealing ring 120 pushes the static sealing ring 110 to move axially, or the pressing component 300 pushes the static sealing ring 110 to move axially, and under the action of the elastic force of the spring 330 and the pressure rope 210, the sealing state between the static sealing ring 110, the dynamic sealing ring 120 and the sealing ring 130 is ensured. At the same time, the corrugated expansion joint 430 expands and contracts with the axial movement of the static sealing ring 110 to maintain the seal.

[0044] Based on the rotary kiln sealing mechanism proposed in this embodiment, a rotary kiln sealing system is proposed, including the above-mentioned rotary kiln sealing mechanism.

[0045] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rotary kiln sealing mechanism, characterized in that, It comprises a sealing component (100) and a pressurizing component (200); The sealing assembly (100) comprises a static sealing ring (110), a dynamic sealing ring (120) and a sealing ring (130); The static sealing ring (110) and the dynamic sealing ring (120) are coaxially arranged and form an annular containing groove, and the sealing ring (130) is sleeved in the annular containing groove; the dynamic sealing ring (120) is connected to the rotary kiln cylinder (10); the sealing ring (130) is provided with a cavity, and a cooling circulating medium is passed into the cavity; The pressurizing component (200) comprises a pressurizing rope (210), wherein the pressurizing rope (210) is wound around the outer circumference of the sealing ring (130) to press the sealing ring (130).

2. The rotary kiln sealing mechanism according to claim 1, characterized in that, The pressurizing assembly (200) further comprises a counterweight (220), wherein the counterweight (220) is connected to an end of the pressurizing rope (210) so that the pressurizing rope (210) presses the sealing ring (130).

3. The rotary kiln sealing mechanism according to claim 2, wherein The pressurizing assembly (200) further comprises a rope support (230), wherein a plurality of the rope supports (230) are evenly distributed around the axis of the sealing ring (130); The rope support (230) is connected to the sealing ring (130), and the pressure rope (210) passes through the through holes on each of the rope supports (230) in sequence.

4. The rotary kiln sealing mechanism according to claim 1, characterized in that, The pressure rope (210) is configured as a steel wire rope.

5. The rotary kiln sealing mechanism according to claim 1, characterized in that, The sealing ring (130) is made of a cloth-reinforced rubber hose.

6. The rotary kiln sealing mechanism according to any one of claims 1-5, characterized in that, Also included is a pressing assembly (300), wherein the pressing assembly (300) comprises a pressing rod (310), a sleeve (320) and a spring (330); The pressure rod (310) is inserted into the sleeve (320) and is slidably connected to the sleeve (320); The spring (330) is sleeved on the pressure rod (310) and inserted into the sleeve (320), and is used to apply a thrust to the pressure rod (310) so that the pressure rod (310) presses the static sealing ring (110) against the dynamic sealing ring (120).

7. The rotary kiln sealing mechanism according to claim 6, characterized in that, The pressing assembly (300) further comprises a top screw (340), a first blocking piece (350) and a second blocking piece (360); The top screw (340) is inserted into the sleeve (320) and threadedly connected to the sleeve (320); One end of the first blocking piece (350) abuts against the top screw (340), and the other end abuts against the spring (330); One end of the second blocking piece (360) abuts against the pressure rod (310), and the other end abuts against an end of the spring (330) away from the first blocking piece (350).

8. The rotary kiln sealing mechanism according to claim 6, characterized in that, Also included is a mounting assembly (400), wherein the mounting assembly (400) includes a fixed ring plate (410) and a movable ring plate (420); A plurality of the clamping assemblies (300) are evenly distributed around the axis of the fixed ring plate (410) and mounted on the fixed ring plate (410); The movable ring plate (420) is connected to the static sealing ring (110), and the pressure rod (310) abuts against the movable ring plate (420); A connecting shaft is provided on the movable ring plate (420), and a long groove extending along the axial direction of the fixed ring plate (410) itself is formed on the fixed ring plate (410); the connecting shaft is inserted into the long groove and can slide along the long groove and / or rotate around its own axis.

9. The rotary kiln sealing mechanism according to claim 8, wherein, The mounting assembly (400) further includes a bellows expansion joint (430); The fixed ring plate (410) is sleeved on the connecting cylinder (20) and connected to the connecting cylinder (20); the movable ring plate (420) is sleeved on the connecting cylinder (20) and is slidably connected to the connecting cylinder (20); The bellows expansion joint (430) is sleeved on the connecting cylinder (20), one end is connected to the fixed ring plate (410), and the other end is connected to the movable ring plate (420).

10. A rotary kiln sealing system, characterized in that, It includes the rotary kiln sealing mechanism according to any one of claims 1-9.

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