Connecting structure of rotary kiln body and backing ring

Abstract

The utility model belongs to the technical field of rotary kilns, and particularly relates to a rotary kiln body and backing ring connecting structure. The rotary kiln comprises a kiln body and a backing ring arranged on the periphery of the kiln body in a sleeving mode, and a gap is formed between the backing ring and the kiln body. The rotary kiln further comprises at least three sets of positioning and connecting assemblies for connecting the kiln body and the backing ring, the positioning and connecting assemblies are installed on the outer circumferential face of the kiln body, and the at least three sets of positioning and connecting assemblies are evenly distributed in the circumferential direction of the kiln body. When the kiln body rotates for calcination, the positioning connecting assembly is used for guaranteeing that the kiln body and the backing ring rotate coaxially and synchronously. The at least three sets of positioning connecting assemblies radially support and position the kiln body in the circumferential direction of the kiln body, guide the kiln body to uniformly expand outwards in the radial direction when the kiln body is heated to expand, ensure that the axis position of the kiln body is not changed, and transmit torque to the backing ring, so that the backing ring coaxially and synchronously rotates along with the kiln body, the abrasion speed of connecting pieces is reduced, and stable operation of the kiln body is ensured. The equipment life is prolonged and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotary kilns, and in particular relates to a connecting structure of a rotary kiln body and a supporting ring. Background Art

[0002] The rotary kiln is also called a rotary calcining kiln. It can be divided into cement kiln, metallurgical chemical kiln and lime kiln according to the different materials processed. The rotary kiln includes the kiln head, kiln body, kiln tail and support frame. The kiln body is a cylindrical structure and is the main body of the rotary kiln. A driven large gear is fixed on the outer circumference of the kiln body, and a driving small gear is provided on the ground below it. The driving small gear meshes with the driven large gear and drives the driven large gear to rotate, thereby causing the kiln body to rotate around its axis.

[0003] The kiln body is covered with multiple support rings, which are used to support and limit the kiln body. Each support ring is provided with a matching support wheel. An adjustable pad is provided between the kiln body and the support ring. Except for the outer surface of the lower part of the kiln body in contact with the adjustable pad, there is sufficient clearance between the other parts of the outer surface of the kiln body and the pad to adapt to the radial expansion and deformation of the cylindrical kiln body after heating. Generally, the reserved radial clearance is larger than the actual radial expansion of the cylinder. During the rotation of the kiln body, relative slip occurs between the support ring and the pad, resulting in pad wear. The longer the use time, the greater the pad wear, and the pad needs to be replaced in time. The above structure is generally applicable to rotary kilns with smaller outer diameters of the kiln body. The reserved radial single-sided clearance generally does not exceed 10mm. When the kiln body is working in a cold state, the reserved clearance will not cause large vibration and noise of the support ring during rotation, and the transmission between the driven large gear on the outer periphery of the kiln body and the active small gear below it is also relatively smooth.

[0004] When the kiln body is a large diameter or super large diameter cylinder, it generally means that the outer diameter of the kiln body is above 6000mm. Compared with the small diameter kiln body, the large diameter kiln body expands more after heating, and the gap between the kiln body and the pad is larger, often the single-side gap exceeds 10mm, or even reaches 30mm. The kiln body of the above structure has a large relative slippage between the pads on the support ring, and the outer diameter and mass of the kiln body increase, the pads wear more severely, and the pads need to be replaced frequently. The kiln body even needs to be stopped for replacement of the pads every week of operation, which wastes manpower and material resources and has low production efficiency. After the kiln body is heated, because the support ring only provides support for the kiln body at the bottom, under the dual effects of the kiln body's own gravity and the support force of the support ring, the circular cross-section of the kiln body is deformed into an elliptical structure approximately with a vertical short axis, and the lining refractory bricks are easily damaged due to the increased extrusion pressure, and the service life of the refractory bricks is shortened. After the large-sized kiln body is heated, the deformation amount increases, which increases the upward lift of the center of the driven large gear, and the center distance between the driven large gear and the driving small gear increases, which reduces the gear overlap, reduces the gear strength, increases the vibration and noise of the equipment, and causes equipment failure. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a connecting structure of a rotary kiln body and a supporting ring, so as to ensure that the kiln body and the supporting ring rotate coaxially and synchronously, thereby extending the service life of the rotary kiln.

[0006] The technical solution adopted by the utility model to solve the technical problem is: a rotary kiln body and a support ring connection structure, comprising a kiln body and a support ring sleeved on the outer periphery of the kiln body, with a gap between the support ring and the kiln body;

[0007] It also includes a positioning connection assembly connecting the kiln body and the support ring, wherein the positioning connection assembly is installed on the outer peripheral surface of the kiln body and at least three groups are provided, and at least three groups of the positioning connection assembly are evenly distributed along the circumference of the kiln body;

[0008] When the kiln body is rotating for calcination, the positioning connection assembly is used to ensure that the kiln body and the support ring are coaxial and rotate synchronously.

[0009] Further, the positioning connection assembly includes a first connection member arranged on the kiln body and a second connection member arranged on the support ring;

[0010] When the kiln body is deformed by thermal expansion or contraction, the outer peripheral surface of the kiln body drives the first connecting member to move on the second connecting member along the radial direction of the kiln body.

[0011] Furthermore, the second connecting member is a limiting slide groove arranged on the end surface of the support ring, and the length direction of the limiting slide groove is arranged along the radial direction of the support ring; the first connecting member is slidably connected to the limiting slide groove.

[0012] Furthermore, the second connecting member is a U-shaped through groove arranged on the inner circumferential surface of the support ring, and the depth direction of the U-shaped through groove is arranged along the radial direction of the support ring;

[0013] The first connecting member is a sliding shaft slidably installed in the U-shaped through groove, and the sliding shaft is arranged along the axial direction of the kiln body.

[0014] Furthermore, both ends of the sliding shaft have kiln body connecting sections, and a support ring connecting section is provided between the two kiln body connecting sections;

[0015] The support ring connecting section is located in the U-shaped through groove, and a limiting plane for acting on the side wall of the U-shaped through groove is provided on the support ring connecting section, and a gap is provided between the limiting plane and the U-shaped through groove.

[0016] Furthermore, a bearing seat is fixedly installed on the outer peripheral surface of the kiln body, and the kiln body connecting section is rotatably connected to the bearing seat along its axial direction; the outer contour of the cross section of the kiln body connecting section is a circular structure;

[0017] The kiln body connecting section at one end of the sliding shaft is fixedly connected to the bearing seat in the axial direction, and the kiln body connecting section at the other end of the sliding shaft can move in the bearing seat along its axial direction.

[0018] Furthermore, it also includes a sleeve, which is arranged between the outer circumference of the kiln body connecting section of the sliding shaft and the inner circumference of the bearing seat; the sliding shaft is rotatably mounted on the bearing seat through the sleeve;

[0019] The shaft sleeve is interference fit with the bearing seat, and the shaft sleeve is clearance fit with the kiln body connecting section on the sliding shaft.

[0020] Furthermore, a support ring axial limiter is provided on the outer circumferential surface of the kiln body, and the support ring axial limiter is evenly distributed along the circumference of the kiln body.

[0021] Furthermore, a positioning groove is provided on the limiting plane on the support ring connecting section, and a pad is installed in the positioning groove;

[0022] The backing plate is fixedly mounted in the positioning groove by a wedge-shaped pressing member, and the first pressing inclined surface on the wedge-shaped pressing member is in surface contact with the side surface of the backing plate;

[0023] The side wall of the positioning groove away from the wedge-shaped pressing piece is a second pressing slope, and the angle between the second pressing slope and the bottom surface of the positioning groove is an acute angle; the second pressing slope is in surface contact with the side surface of the pad.

[0024] Furthermore, the upper surface of the pad is an arc limiting surface protruding outward.

[0025] Compared with the prior art, the utility model has the following beneficial effects: providing a rotary kiln body and support ring connection structure, by setting at least 3 groups of positioning connection components to radially support and position the kiln body in the circumferential direction of the kiln body, guiding the kiln body to expand uniformly in its radial direction when it is heated and expanded, ensuring that the axial position of the kiln body remains unchanged, and at the same time transmitting torque to the support ring, so that the support ring rotates coaxially and synchronously with the kiln body, slowing down the wear rate of the connecting parts, ensuring the smooth operation of the kiln body, extending the life of the equipment, and improving production efficiency. The second connecting part is set as a U-shaped through groove located on the inner circumference of the support ring to reduce the weight of the device; the first connecting part is rotatably installed on the outer circumference of the kiln body through the bearing, so that the limited sliding shaft can be adaptively rotated to ensure the normal operation of the equipment. By setting one end of the sliding shaft as an axial fixed end and the other end as an axial floating end, the sliding shaft can adapt to the axial expansion and contraction of the kiln body. By providing an axial limiter of the support ring on the outer circumferential surface of the kiln body, the relative position of the support ring and the kiln body in the axial direction is guaranteed. The sliding shaft and the bearing seat are connected by a sleeve to avoid damage to the bearing seat and wear on the sleeve. A pad is provided to avoid wear on the sliding shaft. An arc limit surface is provided on the pad to make it slide more smoothly in the U-shaped groove, which is convenient for equipment maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0027] Figure 2 yes Figure 1 A partial schematic diagram of the A-direction view;

[0028] Figure 3 yes Figure 2 The enlarged structural diagram of the middle F part;

[0029] Figure 4 yes Figure 2 Schematic diagram of the cross-sectional structure along the BB direction;

[0030] Figure 5 yes Figure 2 Schematic diagram of the cross-sectional structure along the CC direction;

[0031] Figure 6 yes Figure 5 The schematic diagram of the cross-sectional view along the DD direction;

[0032] Figure markings: 1-kiln body; 11-thermal insulation layer; 2-support ring; 21-support ring axial limiter; 3-positioning connection assembly; 31-first connection member; 32-second connection member; 4-sliding shaft; 41-kiln body connecting section; 42-support ring connecting section; 5-bearing seat; 6-shaft sleeve; 7-positioning groove; 81-pad; 811-arc limit surface; 82-wedge-shaped clamping member. DETAILED DESCRIPTION

[0033] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0034] As attached Figure 1-6 As shown, a rotary kiln body and support ring connection structure comprises a kiln body 1 and a support ring 2 sleeved on the outer circumference of the kiln body 1, with a gap between the support ring 2 and the kiln body 1; and also comprises a positioning connection assembly 3 connecting the kiln body 1 and the support ring 2, wherein the positioning connection assembly 3 is installed on the outer circumference of the kiln body 1 and at least 3 groups are provided, and at least 3 groups of the positioning connection assembly 3 are evenly distributed along the circumference of the kiln body 1; when the kiln body 1 is rotary calcined, the positioning connection assembly 3 is used to ensure that the kiln body 1 and the support ring 2 are coaxial and rotate synchronously. The gap size between the outer circumference of the support ring 2 and the inner circumference of the kiln body 1 should be greater than the unilateral radial expansion deformation of the kiln body 1 after being heated, that is, the support ring 2 can accommodate the limit size of the kiln body 1 after the expansion deformation due to heat.

[0035] The kiln body 1 is a cylindrical structure for containing and calcining materials; the support ring 2 is a circular ring structure for supporting and limiting the kiln body 1. At least three groups of positioning and connecting components 3 evenly distributed along the circumference of the kiln body 1 are not only used to connect the kiln body 1 and the support ring 2, but also radially support the kiln body 1 in the circumference of the kiln body 1 to position it, guide the kiln body 1 to expand evenly in its radial direction when it is heated, ensure that the axis position of the kiln body 1 remains unchanged, and transmit torque to the support ring 2, so that the support ring 2 rotates coaxially and synchronously with the kiln body 1. The utility model converts the circumferential slippage of the kiln body 1 relative to the support ring 2 when it is deformed by heat in the background technology into the radial slippage in the utility model, thereby reducing the slippage of the kiln body 1 relative to the support ring 2, slowing down the wear rate of the connecting parts, extending the service life of the connecting parts, saving production costs, and improving production efficiency; ensuring that the height position of the axis of the kiln body 1 remains unchanged, so that the center distance between the driven large gear and the active small gear on the kiln body 1 remains unchanged, ensuring the meshing degree between the two gears, avoiding excessive vibration and noise during the gear meshing process, ensuring the smooth operation of the kiln body 1, and extending the service life of the gears; under the supporting action of at least 3 groups of connecting components evenly distributed on the circumference of the support ring 2, the thermal deformation of the kiln body 1 is evenly expanded outward with the axis center of the support ring 2 as the reference point, reducing the extrusion force on the refractory bricks in the kiln body 1, and extending the service life of the refractory bricks.

[0036] In order to prevent the heat transfer on the kiln body 1 from causing deformation of the connection assembly 3 and the support ring 2, a thermal insulation layer 11 is provided on the outer peripheral surface of the kiln body 1, and the thermal insulation layer 11 is located between the kiln body 1 and the support ring 2. The thermal insulation layer 11 can be made of thermal insulation materials such as rock wool and glass wool. In order to ensure the force distribution of the kiln body 1 on the support ring 2 and improve the installation stability, at least 4 sets of positioning connection assemblies 3 are set in production.

[0037] The positioning connection assembly 3 has a variety of structural forms, which can be a slideway slider structure, a roller guide rail structure, a ball guide rail structure or a sliding sleeve guide rod structure. Specifically, the positioning connection assembly 3 includes a first connection member 31 arranged on the kiln body 1 and a second connection member 32 arranged on the support ring 2; when the kiln body 1 is deformed by thermal expansion or contraction, the outer circumference of the kiln body 1 drives the first connection member 31 to move radially on the second connection member 32 along the kiln body 1. The movement stroke of the first connection member 31 on the second connection member 32 along the radial direction of the support ring 2 is not less than the single-sided gap between the kiln body 1 and the support ring 2, that is, the size of the second connection member 32 should meet the radial expansion stroke of the kiln body 1. When the kiln body 1 is heated and expanded, the outer circumference of the kiln body 1 expands outward along its radial direction, driving the first connection member 31 on the second connection member 32 to move outward along the radial direction of the support ring 2; conversely, the outer circumference of the kiln body 1 is inward along its radial direction, and drives the first connection member 31 on the second connection member 32 to move inward along the radial direction of the support ring 2. The kiln body 1 drives the first connecting member 31 to rotate synchronously, and the first connecting member 31 acts on the second connecting member 32 to drive the support ring 2 to rotate synchronously.

[0038] The first connecting member 31 and the second connecting member 32 can be connected by sliding or rolling. Due to the large volume and weight of the rotary kiln, multiple ball bearings or roller structures are required to support the kiln body 1, which makes the structure more complicated. Preferably, the first connecting member 31 and the second connecting member 32 are connected by sliding, and the structure is simple. When the second connecting member 32 is a slide groove structure, the corresponding first connecting member 31 is a slider structure; when the second connecting member 32 is a guide strip structure protruding outward, the corresponding first connecting member 31 is a slider structure with a groove.

[0039] Specifically, the second connecting member 32 is a limiting slide groove arranged on the end face of the support ring 2, and the length direction of the limiting slide groove is arranged along the radial direction of the support ring 2; the first connecting member 31 is slidably connected to the limiting slide groove and can move along the length direction of the limiting slide groove. The limiting slide grooves can be arranged on the same side end face of the support ring 2, or they can be staggered or symmetrically arranged on the two end faces of the support ring 2. The limiting slide groove can also be a strip hole structure that passes through the two end faces of the support ring 2. Further simplify the structure and facilitate processing and manufacturing. The first connecting member 31 of the slider structure has a variety of structural forms, such as prisms, cylinders, plates and other structures. It can be integrally formed with the kiln body 1, or it can be installed on the kiln body 1 by welding or bolting.

[0040] Preferably, the second connecting member 32 is a U-shaped through groove arranged on the inner circumference of the support ring 2, and the depth direction of the U-shaped through groove is arranged along the radial direction of the support ring 2; the first connecting member 31 is a sliding shaft 4 slidably installed in the U-shaped through groove, and the sliding shaft 4 is arranged axially along the kiln body 1. When the kiln body 1 expands or contracts, the sliding shaft 4 moves in the U-shaped through groove along the depth direction of the U-shaped through groove. This structure further reduces the weight and volume of the kiln body 1 and the support ring 2. The limited sliding shaft 4 can be a smooth axis or a stepped axis, and its cross section can be of any shape.

[0041] Specifically, the two ends of the sliding shaft 4 have a kiln body connecting section 41, and a support ring connecting section 42 is provided between the two kiln body connecting sections 41; the support ring connecting section 42 is located in the U-shaped through groove, and a limiting plane for acting on the side wall of the U-shaped through groove is provided on the support ring connecting section 42, and a gap is provided between the limiting plane and the U-shaped through groove. The rotation of the kiln body 1 drives the limited sliding shaft 4 to rotate, and the limiting plane on the limited sliding shaft 4 abuts against the side wall of the U-shaped groove, thereby driving the support ring 2 to rotate synchronously with the kiln body 1. The cross section of the support ring connecting section 42 can be of various shapes. In order to facilitate processing and manufacturing, the cross section of the support ring connecting section 42 is generally set to a rectangular structure. For ease of assembly and maintenance, an appropriate gap should be left between the limiting plane and the side of the U-shaped through groove.

[0042] In actual production and application, under the action of high temperature and gravity, when the support ring 1 is expanded and deformed by heat, its cross-sectional outer contour is not a circular structure in an ideal state, but an elliptical structure with a short axis arranged in the up-down direction. In this case, if the limit sliding shaft 4 cannot rotate adaptively and the kiln body 1 continues to expand and deform, at this time, the limit sliding shaft 4 will be engaged with the side wall of the U-shaped through groove and cannot continue to move along the depth direction of the U-shaped through groove, thereby limiting the deformation of the kiln body 1, causing its deformation to be uneven, which is prone to safety accidents. Preferably, a bearing seat 5 is fixedly mounted on the outer peripheral surface of the kiln body 1, and the kiln body connecting section 41 is connected to the bearing seat 5 along its axial rotation; the cross-sectional outer contour of the kiln body connecting section 41 is a circular structure. When the support ring 1 is expanded and deformed by heat, the limit sliding shaft 4 can adaptively rotate around its axis to ensure that the kiln body 1 continues to expand and deform evenly, and to ensure the normal operation of the equipment. Considering that the kiln body 1 will also expand and contract along its axial direction during thermal expansion or contraction, as a further preference, the kiln body connecting section 41 at one end of the sliding shaft 4 is fixedly connected to the bearing seat 5 in the axial direction, and the kiln body connecting section 41 at the other end of the sliding shaft 4 can move in the bearing seat 5 along its axial direction. By setting one end of the sliding shaft 4 as an axial fixed end and the other end as an axial floating end, the sliding shaft 4 can adapt to the axial expansion and contraction of the kiln body, and the kiln body connecting section 41 and the bearing seat 5 are generally fixed in the axial direction by limiting members such as a snap ring and a round nut. As a further preference, it also includes a sleeve 6, which is arranged between the outer circumference of the kiln body connecting section 41 of the sliding shaft 4 and the inner circumference of the bearing seat 5; the sliding shaft 4 is rotatably mounted on the bearing seat 5 through the sleeve 6; the sleeve 6 and the bearing seat 5 are interference fit, and the sleeve 6 and the kiln body connecting section 41 on the sliding shaft 4 are clearance fit. The shaft sleeve 6 is provided to prevent the limited sliding shaft 4 from causing wear and damage to the bearing seat 5 body during rotation and axial movement relative to the bearing seat 5, and the wear occurs on the shaft sleeve 6. The shaft sleeve 6 has low cost and is easy to replace after wear.

[0043] When the kiln body 1 is calcined at high temperature, the kiln body 1 expands radially and stretches axially simultaneously. In order to prevent the limiting plane on the limiting sliding shaft 4 from driving the support ring 2 to slide axially, preferably, an axial limit member 21 for axially limiting the support ring 2 is provided on the outer peripheral surface of the kiln body 1. The support ring axial limit member 21 is evenly distributed along the circumference of the kiln body 1 to ensure the relative axial position of the kiln body 1 and the support ring 2 during the calcination of the rotary kiln.

[0044] During the rotation of the kiln body 1, the limiting plane is in contact with the side wall of the U-shaped through groove for a long time. Over time, the limiting plane is easily worn, and the entire limiting sliding shaft 4 needs to be replaced. Preferably, a positioning groove 7 is provided on the limiting plane on the support ring connecting section 42, and a pad 81 is installed in the positioning groove 7. The pad 81 replaces the limiting plane on the limiting sliding shaft 4 to abut against the side wall of the U-shaped through groove. Wear occurs on the pad 81 and prevents the limiting sliding shaft 4 from wear. Compared with regularly replacing the entire limiting sliding shaft 4, it is relatively easy to replace the pad 81, which saves costs and improves maintenance efficiency. In order to ensure the position of the pad 81 on the limiting plane, preferably, a positioning groove 7 is provided on the limiting plane, and the pad 81 is installed in the positioning groove 7, and the positioning groove 7 positions the pad 81. As a further preference, the pad 81 is fastened and installed in the positioning groove 7 by a wedge-shaped pressing piece 82, and the first pressing slope on the wedge-shaped pressing piece 82 is in surface contact with the side surface of the pad 81; the side wall of the positioning groove 7 away from the wedge-shaped pressing piece 82 is a second pressing slope, and the angle between the second pressing slope and the bottom surface of the positioning groove 7 is an acute angle; the second pressing slope is in surface contact with the side surface of the pad 81. During installation, the pad 81 is first installed in the positioning groove 7, and then the wedge-shaped pressing piece 62 is installed in the gap between the positioning groove 7 and the pad 81, and the pad 81 is pressed in the positioning groove 7 to prevent the pad 81 and the wedge-shaped pressing piece 62 from loosening and falling out. In order to increase the stability of the installation, the wedge-shaped pressing piece 62 is generally fastened to the limited sliding shaft 4 with bolts.

[0045] If the upper surface of the backing plate 81 is a plane, when the kiln body 1 rotates, there is a gap between the backing plate 81 and the side wall of the U-shaped slot, and the backing plate 81 is likely to be in line contact with the side wall of the U-shaped slot after swinging in the U-shaped limiting slot and is easily stuck, making it difficult to replace. Preferably, the upper surface of the backing plate 81 is an arc limiting surface 811 protruding outward, and the arc limiting surface 811 slides more smoothly in the U-shaped slot and will not be completely stuck, making it easy to replace.

[0046] The above is a specific implementation of the utility model. It can be seen from the implementation process that the utility model provides a rotary kiln body and a support ring connection structure. By setting at least 3 groups of positioning and connecting components, the kiln body is radially supported and positioned in the circumferential direction of the kiln body, and the kiln body is guided to expand uniformly in the radial direction when it is heated and expanded, so as to ensure that the axis position of the kiln body remains unchanged, and at the same time, the torque is transmitted to the support ring, so that the support ring rotates coaxially and synchronously with the kiln body, slowing down the wear rate of the connecting parts, ensuring the smooth operation of the kiln body, extending the life of the equipment, and improving production efficiency. The second connecting part is set as a U-shaped through groove located on the inner circumference of the support ring to reduce the weight of the device; the first connecting part is rotatably installed on the outer circumference of the kiln body through the bearing, so that the limited sliding shaft can be adaptively rotated to ensure the normal operation of the equipment. By setting one end of the sliding shaft as an axial fixed end and the other end as an axial floating end, the sliding shaft adapts to the axial expansion and contraction of the kiln body. By providing an axial limiter of the support ring on the outer circumference of the kiln body, the relative position of the support ring and the kiln body in the axial direction is guaranteed. The sliding shaft and the bearing seat are connected by a sleeve to avoid damage to the bearing seat and wear on the sleeve. A pad is provided to avoid wear on the sliding shaft. An arc limit surface is provided on the pad to make it slide more smoothly in the U-shaped groove, which is convenient for equipment maintenance.

Claims

1. A rotary kiln body and support ring connection structure, comprising a kiln body (1) and a support ring (2) sleeved on the outer circumference of the kiln body (1), wherein a gap exists between the support ring (2) and the kiln body (1); characterized in that: It also includes a positioning connection assembly (3) connecting the kiln body (1) and the support ring (2), wherein the positioning connection assembly (3) is installed on the outer peripheral surface of the kiln body (1) and at least three groups are provided, and at least three groups of the positioning connection assembly (3) are evenly distributed along the circumference of the kiln body (1); When the kiln body (1) is rotating for calcination, the positioning connection assembly (3) is used to ensure that the kiln body (1) and the support ring (2) rotate coaxially and synchronously.

2. The rotary kiln body and support ring connection structure according to claim 1, characterized in that: The positioning connection assembly (3) comprises a first connection member (31) arranged on the kiln body (1) and a second connection member (32) arranged on the support ring (2); When the kiln body (1) is deformed due to thermal expansion or contraction, the outer peripheral surface of the kiln body (1) drives the first connecting member (31) to move on the second connecting member (32) along the radial direction of the kiln body (1).

3. The rotary kiln body and support ring connection structure according to claim 2, characterized in that: The second connecting member (32) is a limiting sliding groove arranged on the end surface of the support ring (2), and the length direction of the limiting sliding groove is arranged along the radial direction of the support ring (2); the first connecting member (31) is slidably connected to the limiting sliding groove.

4. The rotary kiln body and support ring connection structure according to claim 2, characterized in that: The second connecting member (32) is a U-shaped through groove arranged on the inner circumferential surface of the support ring (2), and the depth direction of the U-shaped through groove is arranged along the radial direction of the support ring (2); The first connecting member (31) is a sliding shaft (4) slidably mounted in the U-shaped through groove, and the sliding shaft (4) is arranged axially along the kiln body (1).

5. The rotary kiln body and support ring connection structure according to claim 4, characterized in that: The two ends of the sliding shaft (4) are provided with kiln body connecting sections (41), and a support ring connecting section (42) is provided between the two kiln body connecting sections (41); The support ring connecting section (42) is located in the U-shaped through groove, and a limiting plane for acting on the side wall of the U-shaped through groove is provided on the support ring connecting section (42), and a gap is provided between the limiting plane and the U-shaped through groove.

6. The rotary kiln body and support ring connection structure according to claim 5, characterized in that: A bearing seat (5) is fixedly mounted on the outer peripheral surface of the kiln body (1), and the kiln body connecting section (41) is rotatably connected to the bearing seat (5) along its axial direction; the outer contour of the cross section of the kiln body connecting section (41) is a circular structure; The kiln body connecting section (41) at one end of the sliding shaft (4) is fixedly connected to the bearing seat (5) in the axial direction, and the kiln body connecting section (41) at the other end of the sliding shaft (4) can move in the bearing seat (5) along its axial direction.

7. The rotary kiln body and support ring connection structure according to claim 6, characterized in that: It also includes a shaft sleeve (6), which is arranged between the outer circumference of the kiln body connecting section (41) of the sliding shaft (4) and the inner circumference of the bearing seat (5); the sliding shaft (4) is rotatably mounted on the bearing seat (5) through the shaft sleeve (6); The shaft sleeve (6) and the bearing seat (5) are interference fit, and the shaft sleeve (6) and the kiln body connecting section (41) on the sliding shaft (4) are clearance fit.

8. The rotary kiln body and support ring connection structure according to any one of claims 1 to 7, characterized in that: A support ring axial limiter (21) is provided on the outer circumferential surface of the kiln body (1), and the support ring axial limiter (21) is evenly distributed along the circumference of the kiln body (1).

9. The rotary kiln body and support ring connection structure according to any one of claims 5 to 7, characterized in that: A positioning groove (7) is provided on the limiting plane on the support ring connecting section (42), and a pad (81) is installed in the positioning groove (7); The backing plate (81) is fixedly installed in the positioning groove (7) by means of a wedge-shaped pressing piece (82), and a first pressing inclined surface on the wedge-shaped pressing piece (82) is in surface contact with a side surface of the backing plate (81); The side wall of the positioning groove (7) away from the wedge-shaped pressing piece (82) is a second pressing slope, and the angle between the second pressing slope and the bottom surface of the positioning groove (7) is an acute angle; the second pressing slope is in surface contact with the side surface of the pad (81).

10. The rotary kiln body and support ring connection structure according to claim 9, characterized in that: The upper surface of the pad (81) is an outwardly protruding arc limiting surface (811).

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