Long span and heavy load-bearing descaling water-cooled furnace rollers

Abstract

The invention discloses a long-span, large-load-bearing, descaling, water-cooled furnace roller, comprising a roller shaft, a conical transition body and a furnace roller, the inner wall of the furnace roller being rotatably contacted and connected with a spiral strut, a load-bearing roller being fixed at the central axis position of the spiral strut, an axis cavity being provided at the central axis position of the load-bearing roller, a rotating groove being provided on the cavity wall of the axis cavity, a support frame being slidably provided in the rotating groove, a water-dividing, load-bearing transmission rod being fixed at the axis center of the support frame, the water-dividing, load-bearing transmission rod passing through the roller shaft at the water outlet end side of the long-span, large-load-bearing, descaling, water-cooling furnace roller of the invention being exposed to the outside, graphite thrust rings being fixed at both ends of the inner wall of the furnace roller, the spiral strut being in sliding contact with the graphite thrust ring, the invention has the characteristics of long span, large load-bearing, descaling, high heat dissipation efficiency, no deformation, no nodule, saving cooling water, reducing energy loss of high-temperature furnace, good economy, energy saving and environmental protection, and prolonging the service life of the product.

Description

Technical Field

[0001] The invention relates to the technical field of high-temperature heating furnaces, in particular to a long-span and heavy-load descaling water-cooled furnace roller of a high-temperature heating furnace. Background Art

[0002] At present, in roller-bottom continuous heat treatment furnaces, water-cooled furnace rollers need to use circulating cooling water to cool the furnace rollers. For example, the temperature of the non-oxidizing heating section of the thick plate galvanizing annealing furnace reaches 1000-1200 degrees Celsius. The amount of cooling water has a greater impact on the water-cooled furnace rollers. The larger the amount of water, the lower the furnace roller temperature, and vice versa. Under the premise of ensuring that the surface temperature of the furnace roller does not exceed the limit temperature, the less cooling water is used, the better, which can reduce the heat loss of the furnace body. If the cooling effect of the water-cooled furnace roller is not good, nodules will appear on the roller surface of the furnace roller, the furnace roller will deform, bend or even stop rotating, the workpiece will deviate or get stuck, and ultimately the quality of the heat-treated product will be reduced; in addition, the water-cooled furnace rollers need to be replaced frequently, which not only interrupts the production line and reduces product output, but also the water-cooled furnace rollers are made of heat-resistant steel, which is expensive and increases the operating costs of the enterprise.

[0003] Traditional furnace rollers are usually hollow structures without shielding support. The bearing strength of furnace rollers with this structure is usually poor. In addition, the channel between the water inlet and the water outlet of the furnace rollers with this structure is not shielded, and the cooling water stays in the furnace rollers for a short time, so the cooling effect is not good. The furnace rollers are also prone to deformation of the roller surface and accelerated nodulation due to insufficient cooling. In high-temperature heating furnaces, due to the huge heat, especially on furnace rollers with large load-bearing capacity, the roller body is also prone to deformation due to the load-bearing problem. In large furnaces, long-span furnace rollers are also prone to deformation. Water-cooled furnace rollers also have the problem of scale. Especially after long-term operation, even if the water is purified and treated with drugs, scale will gradually form because the inside of the water-cooled furnace rollers cannot be cleaned. This is a difficult problem to solve. Scale will inevitably make the cooling effect of water-cooled furnace rollers poor, increase water consumption, and also affect the service life of the furnace rollers. Therefore, as a high-temperature heating furnace, it is necessary to propose a new design scheme for long-span and large-load-bearing water-cooled furnace rollers. Summary of the invention

[0004] The purpose of the present invention is to provide a descaling water-cooled furnace roller with a long span and a large load-bearing capacity.

[0005] The technical solution to achieve the purpose of the present invention is: a long-span, large-load-bearing, descaling, water-cooled furnace roller, comprising a roller shaft, a conical transition body and a furnace roller, wherein both ends of the furnace roller are connected to the conical transition body, the conical transition body is connected to the roller shaft, the inner wall of the furnace roller is rotatably contacted and connected with a spiral strut, a load-bearing roller is fixed at the central axis position of the spiral strut, an axis cavity is provided at the central axis position of the load-bearing roller, a rotating groove is provided on the cavity wall of the axis cavity, a support frame is slidably provided in the rotating groove, a water-dividing, load-bearing transmission rod is fixed at the axis center of the support frame, the water-dividing, load-bearing transmission rod passes through the roller shaft on the water outlet side of the long-span, large-load-bearing, descaling, water-cooling furnace roller, and is exposed to the outside, graphite thrust rings are fixed at both ends of the inner wall of the furnace roller, and the spiral strut is in sliding contact with the graphite thrust ring.

[0006] Preferably, the graphite thrust ring includes an inner ring and an outer ring, a side ring is fixed between the inner ring and the outer ring, the inner side of the side ring is connected to the plane bearing, the inner side of the plane bearing is connected to the partition ring, the inner side of the partition ring is connected to the graphite ring, the inner side of the graphite ring is crimped with a pressure ring, the pressure ring is arranged between the inner ring and the outer ring, and the pressure ring is rotatably connected to the inner ring and the outer ring, the outer ring is fixedly connected to the inner wall of the furnace roller, and the pressure ring is in sliding contact with the spiral support.

[0007] Preferably, a semicircular groove ring is provided on the inner side of the pressure ring, and sliding hemispheres are provided at both ends of the spiral strut, and the sliding hemispheres are slidably connected to the semicircular groove ring.

[0008] Preferably, the number of the graphite rings is 2, and the two layers of graphite rings are rotatably contacted and connected.

[0009] Preferably, the starting and ending ends of the rotating groove are no less than 1 cm away from the two ends of the inner wall of the load-bearing roller.

[0010] Preferably, the support frame is Y-shaped, and a hemisphere is provided at the contact point between the support frame and the rotating groove, the rotating groove is a semicircular rotating groove, and the hemisphere is in sliding contact with the semicircular rotating groove.

[0011] Preferably, a water hole is provided on the Y-shaped support arm of the support frame.

[0012] Preferably, the spiral strut is composed of a plurality of spiral augers with equal pitch, the pitch between the spiral augers is not less than 70 mm, and the thickness of the spiral augers is not less than 6 mm.

[0013] Preferably, the spiral strut is made of heat-resistant steel.

[0014] Another technical solution to achieve the purpose of the present invention is: a long-span, large-load-bearing, descaling, water-cooled furnace roller, comprising a roller shaft, a conical transition body and a furnace roller, wherein both ends of the furnace roller are connected to the conical transition body, the conical transition body is connected to the roller shaft, the inner wall of the furnace roller is rotatably contacted and connected with a spiral strut, a load-bearing roller is fixed at the central axis position of the spiral strut, an axis cavity is provided at the central axis position of the load-bearing roller, a support frame is fixed on the cavity wall of the axis cavity, a water-dividing, load-bearing transmission rod is fixed at the axis center of the support frame, the water-dividing, load-bearing transmission rod passes through the roller shaft on the water outlet side of the long-span, large-load-bearing, descaling, water-cooled furnace roller and is exposed to the outside, graphite thrust rings are fixed at both ends of the inner wall of the furnace roller, and the spiral strut is in sliding contact with the graphite thrust ring.

[0015] Compared with the prior art, the present invention has the following significant advantages: the plane bearing and the two-layer graphite ring both enhance the plane rotation function of the graphite thrust ring itself, and the sliding hemisphere and the semicircular groove ring further increase the slidable rotation function of the spiral support; the cooperation of the hemisphere and the semicircular rotating groove is to reduce the damping of the horizontal movement of the water-dividing load-bearing transmission rod to drive the rotation of the load-bearing roller, so that the cooperation between the water-dividing load-bearing transmission rod and the load-bearing roller is smoother; the distance between the starting and ending ends of the rotating groove and the two end heads of the inner wall of the load-bearing roller effectively limits the reciprocating motion of the water-dividing load-bearing transmission rod; the Y-shaped support arm of the support frame is provided with a water hole, the support frame has good supporting and load-bearing performance, the strength structure of the support frame itself is also strengthened, and at the same time the Y-shaped structure of the support frame also avoids the formation of cooling water The larger resistance is further reduced by providing a water hole on the Y-shaped support arm; the spiral support is composed of a number of spiral augers with equal pitch, the pitch between the spiral augers is not less than 70mm, the thickness of the spiral augers is not less than 6mm, and the spiral support is made of heat-resistant steel, which can prevent the cooling water from being retained in the long-span and heavy-load descaling water-cooled furnace roller for too long or too short a time, effectively control the cooling water flow and the heat dissipation contact area, enhance the radial strength of the spiral support, and increase the heat resistance of the spiral support, extend the service life of the long-span and heavy-load descaling water-cooled furnace roller, reduce the heat loss taken away by the long-span and heavy-load descaling water-cooled furnace roller from the high-temperature heating furnace, and improve the heat dissipation efficiency of the long-span and heavy-load descaling water-cooled furnace roller itself; the water-dividing load-bearing transmission rod is made The reciprocating motion left and right drives the support frame to also reciprocate left and right. The rotating groove is slidably connected to the support frame, and the rotating groove is a spiral groove, which in turn drives the load-bearing roller to rotate, and finally drives the spiral support to rotate. The spiral support scrapes away the scale deposited on the inner wall of the furnace roller, so that the present invention has a descaling function, and realizes the function of cleaning and maintaining the scale inside the long-span and large-load-bearing descaling water-cooled furnace roller of the high-temperature heating furnace; the furnace roller, spiral support, load-bearing roller, support frame, and water-dividing load-bearing transmission rod are mutually supported and related in the vertical direction, which enhances the structural strength of the present invention, greatly improves the load-bearing capacity of the present invention, and realizes that the furnace roller does not deform in a high-temperature, long-span and large-load-bearing use environment, and can be competent as a long-span and large-load-bearing furnace roller in a large high-temperature heating furnace. Use of water-cooled furnace rollers; due to the use of water cooling, and the cooling area of ​​the cooling water in the long-span, large-load-bearing descaling water-cooled furnace rollers is increased, the spiral struts force the cooling water running speed to decrease, thereby improving the heat dissipation efficiency of the cooling water, so that the long-span, large-load-bearing descaling water-cooled furnace rollers have good heat dissipation performance, avoiding nodules on the furnace roller surface caused by unfavorable heat dissipation, and not taking away more heat from the high-temperature heating furnace, achieving a good balance between the heat dissipation of the long-span, large-load-bearing descaling water-cooled furnace rollers and the heat loss of the high-temperature heating furnace; the present invention has the characteristics of long span, large load-bearing capacity, descaling, high heat dissipation efficiency, no deformation, no nodules, saving cooling water, reducing the energy loss of the high-temperature heating furnace, good economy and energy saving and environmental protection, and also prolongs the service life of the present invention.

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of Example 1 of the long-span and large-load-bearing descaling water-cooled furnace roller of the present invention.

[0018] Figure 2 It is a schematic diagram of Example 2 of the long-span and large-load-bearing descaling water-cooled furnace roller of the present invention.

[0019] Figure 3 for Figure 1 and Figure 2 Schematic diagram of the enlarged structure of part A in FIG. DETAILED DESCRIPTION

[0020] Embodiment 1:

[0021] like Figure 1 and Figure 3As shown, a long-span, heavy-load-bearing descaling water-cooled furnace roller comprises a roller shaft 1, a conical transition body 2 and a furnace roller 3, wherein both ends of the furnace roller 3 are connected to the conical transition body 2, and the conical transition body 2 is connected to the roller shaft 1, and the inner wall of the furnace roller 3 is connected with a spiral support 4 in rotational contact, and a load-bearing roller 5 is fixed at the central axis position of the spiral support 4, and an axis cavity is provided at the central axis position of the load-bearing roller 5, and a rotating groove 9 is provided on the cavity wall of the axis cavity, and a support frame 6 is slidably provided in the rotating groove 9, and a water-dividing load-bearing transmission rod 7 is fixed at the axis center of the support frame 6, and the water-dividing load-bearing transmission rod 7 passes through the long-span, heavy-load-bearing transmission rod 7. The roller shaft 1 on the water outlet side of the load-bearing descaling water-cooled furnace roller is connected to the hydraulic telescopic device 14 through a rotary joint 15. The roller shaft 1 on the water outlet side is connected to the rotary joint 15, and the rotary joint 15 is connected to the hydraulic telescopic device 14. Graphite thrust rings 11 are fixed at both ends of the inner wall of the furnace roller 3, and the spiral strut 4 is in sliding contact with the graphite thrust ring 11; the graphite thrust ring 11 includes an inner ring 111 and an outer ring 113, and a side ring 112 is fixed between the inner ring 111 and the outer ring 113, and the inner side of the side ring 112 is connected to a plane bearing 117, and the inner side of the plane bearing 117 is connected to a spacer The inner side of the separating ring 116 is connected to the graphite ring 115, and the inner side of the graphite ring 115 is crimped with a pressure ring 114, and the pressure ring 114 is arranged between the inner ring 111 and the outer ring 113, and the pressure ring 114 is rotatably connected to the inner ring 111 and the outer ring 113, and the outer ring 113 is fixedly connected to the inner wall of the furnace roller 3, and the pressure ring 114 is in sliding contact with the spiral support 4, and the inner side of the pressure ring 114 is provided with a semicircular groove ring 119, and both ends of the spiral support 4 are provided with sliding hemispheres 118, and the sliding hemispheres 118 are slidably connected to the semicircular groove ring 119, and the graphite ring 1 The number of 15 is 2 layers, and the 2 layers of graphite rings 115 are rotatably contacted and connected; the starting and ending ends of the rotating groove 9 are 2 cm away from the two ends of the inner wall of the load-bearing roller 5, the supporting frame 6 is Y-shaped, and a hemisphere is provided at the contact point between the supporting frame 6 and the rotating groove 9. The rotating groove 9 is a semicircular rotating groove, and the hemisphere is in sliding contact with the semicircular rotating groove. A water hole is provided on the Y-shaped supporting arm of the supporting frame 6; the spiral strut 4 is composed of 3 spiral augers with equal pitch, the pitch between the spiral augers is 80 mm, the thickness of the spiral augers is 8 mm, and the spiral strut 4 is made of heat-resistant steel.

[0022] The working principle of the present invention is as follows: the plane bearing 117 and the two-layer graphite ring 115 are for enhancing the plane rotation function of the graphite thrust ring 11 itself, while the sliding hemisphere 118 and the semicircular groove ring 119 are for further increasing the slidable rotation function of the spiral support 4; the cooperation of the hemisphere and the semicircular rotation groove is for reducing the damping of the horizontal movement of the water-dividing load-bearing transmission rod 7 to drive the rotation of the load-bearing roller 5, so that the cooperation between the water-dividing load-bearing transmission rod 7 and the load-bearing roller 5 is smoother; the starting and ending ends of the rotating groove 9 are 2 cm away from the two ends of the inner wall of the load-bearing roller 5, which can effectively limit the reciprocating motion of the water-dividing load-bearing transmission rod 7; the Y-shaped support arm of the support frame 6 is provided with a water hole, on the one hand, the support frame 6 has a good supporting and load-bearing performance, on the other hand, the strength structure of the support frame 6 itself is also strengthened, At the same time, the Y-shaped structure of the support frame 6 also avoids the formation of a large resistance to the cooling water. The water holes provided on the Y-shaped support arm further reduce the resistance to the cooling water. The spiral support 4 is composed of 3 spiral augers with equal pitch. The pitch between the spiral augers is 80mm, and the thickness of the spiral augers is 8mm. The spiral support 4 is made of heat-resistant steel, which can avoid the cooling water from being retained in the long-span and heavy-load-bearing descaling water-cooled furnace roller for too long or too short a time, effectively control the cooling water flow and the heat dissipation contact area, enhance the radial strength of the spiral support 4, and at the same time increase the heat resistance of the spiral support 4, extend the service life of the long-span and heavy-load-bearing descaling water-cooled furnace roller, reduce the heat loss taken away from the high-temperature heating furnace by the long-span and heavy-load-bearing descaling water-cooled furnace roller, and improve the heat dissipation efficiency of the long-span and heavy-load-bearing descaling water-cooled furnace roller itself.

[0023] The hydraulic telescopic device 14 drives the water-dividing load-bearing transmission rod 7 to reciprocate left and right, and the support frame 6 is fixed to the water-dividing load-bearing transmission rod 7, thereby driving the support frame 6 to reciprocate left and right, and the rotating groove 9 is slidably connected with the support frame 6, and the rotating groove 9 is a spiral groove, so the load-bearing roller 5 is driven to rotate, and the spiral support 4 is driven to rotate, and the spiral support 4 scrapes away the scale deposited on the inner wall of the furnace roller 3, so that the present invention has a descaling function, and realizes the function of cleaning and maintaining the scale inside the long-span and large-load-bearing descaling water-cooled furnace roller of the high-temperature heating furnace; the furnace roller 3, the spiral support 4, the load-bearing roller 5, the support frame 6, and the water-dividing load-bearing transmission rod 7 are mutually supported and related in the vertical direction, which enhances the structural strength of the present invention, greatly improves the load-bearing capacity of the present invention, and realizes that the furnace roller 3 is not Deformation, capable of being used as a long-span and heavy-load-bearing water-cooled furnace roller in a large high-temperature heating furnace; due to the use of water cooling, and the cooling area of ​​the cooling water in the long-span and heavy-load-bearing descaling water-cooled furnace roller is increased, the spiral support 4 forces the cooling water running speed to decrease, thereby improving the heat dissipation utilization efficiency of the cooling water, so that the long-span and heavy-load-bearing descaling water-cooled furnace roller has good heat dissipation performance, avoids nodules on the surface of the furnace roller 3 caused by unfavorable heat dissipation, and does not take away more heat from the high-temperature heating furnace, achieving a good balance between the heat dissipation of the long-span and heavy-load-bearing descaling water-cooled furnace roller and the heat loss of the high-temperature heating furnace; the present invention has the characteristics of long span, large load-bearing capacity, descaling, high heat dissipation efficiency, no deformation, no nodule, saving cooling water, reducing the energy loss of the high-temperature heating furnace, good economy and energy saving and environmental protection, and also prolongs the service life of the present invention.

[0024] Embodiment 2:

[0025] like Figure 2 and Figure 3As shown, a long-span, large-load-bearing descaling water-cooled furnace roller comprises a roller shaft 1, a conical transition body 2 and a furnace roller 3, wherein both ends of the furnace roller 3 are connected to the conical transition body 2, the conical transition body 2 is connected to the roller shaft 1, the inner wall of the furnace roller 3 is connected with a spiral support 4 in rotational contact, a load-bearing roller 5 is fixed at the central axis position of the spiral support 4, an axis cavity is provided at the central axis position of the load-bearing roller 5, a support frame 6 is fixed on the cavity wall of the axis cavity, a water-dividing load-bearing transmission rod 7 is fixed at the axis center of the support frame 6, and the water-dividing load-bearing transmission rod 7 is fixed at the axis center of the water-dividing load-bearing transmission rod 7. The heavy transmission rod 7 passes through the roller shaft 1 on the water outlet side of the long-span, heavy-load-bearing descaling water-cooled furnace roller and passes through the rotary joint 15 to be connected to the motor rotation drive device 16. The roller shaft 1 on the water outlet side is connected to the rotary joint 15, and the rotary joint 15 is connected to the motor rotation drive device 16. Graphite thrust rings 11 are fixed at both ends of the inner wall of the furnace roller 3, and the spiral strut 4 is in sliding contact with the graphite thrust ring 11; the graphite thrust ring 11 includes an inner ring 111 and an outer ring 113, and a side The inner side of the side ring 112 is connected to the plane bearing 117, the inner side of the plane bearing 117 is connected to the partition ring 116, the inner side of the partition ring 116 is connected to the graphite ring 115, the inner side of the graphite ring 115 is crimped with a pressure ring 114, the pressure ring 114 is arranged between the inner ring 111 and the outer ring 113, and the pressure ring 114 is rotatably connected to the inner ring 111 and the outer ring 113, the outer ring 113 is fixedly connected to the inner wall of the furnace roller 3, the pressure ring 114 is in sliding contact with the spiral support 4, and the pressure ring 114 A semicircular groove ring 119 is provided on the inner side, and sliding hemispheres 118 are provided at both ends of the spiral strut 4. The sliding hemispheres 118 are slidably connected to the semicircular groove ring 119. The number of the graphite rings 115 is 2 layers, and the 2 layers of graphite rings 115 are rotatably contacted and connected; a water hole is provided on the Y-shaped support arm of the support frame 6; the spiral strut 4 is composed of 3 spiral augers with equal pitch, the pitch between the spiral augers is 80mm, the thickness of the spiral augers is 8mm, and the spiral strut 4 is made of heat-resistant steel.

[0026] The working principle of the present invention is: the plane bearing 117 and the two-layer graphite ring 115 are for enhancing the plane rotation function of the graphite thrust ring 11 itself, while the sliding hemisphere 118 and the semicircular groove ring 119 are for further increasing the slidable rotation function of the spiral strut 4; the Y-shaped support arm of the support frame 6 is provided with a water hole, on the one hand, the support frame 6 has a good supporting load-bearing performance, on the other hand, the strength structure of the support frame 6 itself is also strengthened, and at the same time, the Y-shaped structure of the support frame 6 also avoids the formation of a large resistance to the cooling water, and the water hole provided on the Y-shaped support arm further reduces the resistance to the cooling water; the spiral strut 4 is 3 spiral augers are combined with equal pitch, the pitch between the spiral augers is 80mm, the thickness of the spiral augers is 8mm, and the spiral support 4 is made of heat-resistant steel, which can prevent the cooling water from being retained in the long-span and heavy-load descaling water-cooled furnace roller for too long or too short a time, effectively control the cooling water flow and the heat dissipation contact area, enhance the radial strength of the spiral support 4, and at the same time increase the heat resistance of the spiral support 4, extend the service life of the long-span and heavy-load descaling water-cooled furnace roller, reduce the heat loss taken away by the long-span and heavy-load descaling water-cooled furnace roller from the high-temperature heating furnace, and improve the heat dissipation efficiency of the long-span and heavy-load descaling water-cooled furnace roller itself.

[0027] The motor rotation drive device 16 drives the water-dividing load-bearing transmission rod 7 to rotate, and the water-dividing load-bearing transmission rod 7 is fixed to the support frame 6, the support frame 6 is fixed to the load-bearing roller 5, and the load-bearing roller 5 is fixed to the spiral support 4, thereby driving the spiral support 4 to rotate, and the spiral support 4 scrapes away the scale deposited on the inner wall of the furnace roller 3, so that the present invention has a descaling function, and realizes the function of cleaning and maintaining the scale inside the long-span and large-load-bearing descaling water-cooled furnace roller of the high-temperature heating furnace; the furnace roller 3, the spiral support 4, the load-bearing roller 5, the support frame 6, and the water-dividing load-bearing transmission rod 7 are mutually supported and related in the vertical direction, which enhances the structural strength of the present invention, greatly improves the load-bearing capacity of the present invention, and realizes that the furnace roller 3 does not deform in a high-temperature, long-span and large-load-bearing use environment, and is competent for large-scale high-temperature heating It is used as a long-span, heavy-load-bearing water-cooled furnace roller in the furnace; due to the use of water cooling, and the cooling area of ​​the cooling water in the long-span, heavy-load-bearing descaling water-cooled furnace roller is increased, the spiral support 4 forces the cooling water running speed to decrease, thereby improving the heat dissipation efficiency of the cooling water, so that the long-span, heavy-load-bearing descaling water-cooled furnace roller has good heat dissipation performance, avoids nodules on the surface of the furnace roller 3 caused by unfavorable heat dissipation, and does not take away more heat from the high-temperature heating furnace, achieving a good balance between the heat dissipation of the long-span, heavy-load-bearing descaling water-cooled furnace roller and the heat loss of the high-temperature heating furnace; the present invention has the characteristics of long span, heavy load-bearing, descaling, high heat dissipation efficiency, no deformation, no nodule, saving cooling water, reducing the energy loss of the high-temperature heating furnace, good economy and energy saving and environmental protection, and also prolongs the service life of the present invention.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the patent of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A long-span, heavy-load-bearing, descaling water-cooled furnace roller, comprising a roller shaft (1), a conical transition body (2) and a furnace roller (3), wherein both ends of the furnace roller (3) are connected to the conical transition body (2), and the conical transition body (2) is connected to the roller shaft (1), characterized in that: The inner wall of the furnace roller (3) is connected to a spiral support (4) in a rotatable manner. A load-bearing roller (5) is fixed at the central axis position of the spiral support (4). An axis cavity is provided at the central axis position of the load-bearing roller (5). A rotating groove (9) is provided on the cavity wall of the axis cavity. A support frame (6) is slidably provided in the rotating groove (9). A water-dividing load-bearing transmission rod (7) is fixed at the axis center of the support frame (6). The water-dividing load-bearing transmission rod (7) passes through the roller shaft (1) on the water outlet side of the long-span, large-load-bearing descaling water-cooled furnace roller and is exposed to the outside. The water-dividing load-bearing transmission rod (7) passes through the roller shaft (1) on the water outlet side of the long-span, large-load-bearing descaling water-cooled furnace roller and passes through a rotating joint (15) to be connected to a hydraulic telescopic device (14). The roller shaft (1) on the water outlet side is connected to the rotating joint (15), and the rotating joint (15) is connected to the hydraulic telescopic device (14). The inner wall of the furnace roller (3) Graphite thrust rings (11) are fixed at both ends, and the spiral strut (4) is in sliding contact with the graphite thrust ring (11); the graphite thrust ring (11) comprises an inner ring (111) and an outer ring (113); a side ring (112) is fixed between the inner ring (111) and the outer ring (113); the inner side of the side ring (112) is connected to a plane bearing (117); the inner side of the plane bearing (117) is connected to a partition ring (116); The inner side of the partition ring (116) is connected to the graphite ring (115), and the inner side of the graphite ring (115) is crimped with a pressure ring (114), the pressure ring (114) is arranged between the inner ring (111) and the outer ring (113), and the pressure ring (114) is rotatably connected to the inner ring (111) and the outer ring (113), the outer ring (113) is fixedly connected to the inner wall of the furnace roller (3), and the pressure ring (114) is in sliding contact with the spiral support (4).

2. The long-span, heavy-load-bearing, descaling water-cooled furnace roller according to claim 1 is characterized in that: A semicircular groove ring (119) is provided on the inner side of the pressure ring (114), and sliding hemispheres (118) are provided on both ends of the spiral support (4), and the sliding hemispheres (118) are slidably connected to the semicircular groove ring (119).

3. The long-span, heavy-load-bearing, descaling water-cooled furnace roller according to claim 1 is characterized in that: The number of the graphite rings (115) is two, and the two layers of graphite rings (115) are rotatably contacted and connected.

4. The long-span, heavy-load-bearing, descaling water-cooled furnace roller according to claim 1 is characterized in that: The starting and ending ends of the rotating groove (9) are each no less than 1 cm away from the ends of the inner wall of the load-bearing roller (5).

5. The long-span, heavy-load-bearing, descaling water-cooled furnace roller according to claim 1 is characterized in that: The support frame (6) is Y-shaped, and a hemispherical body is provided at the contact point between the support frame (6) and the rotating groove (9), the rotating groove (9) is a semicircular rotating groove, and the hemispherical body is in sliding contact with the semicircular rotating groove.

6. The long-span, heavy-load descaling water-cooled furnace roller according to claim 5 is characterized in that: A water hole is provided on the Y-shaped support arm of the support frame (6).

7. The long-span, heavy-load descaling water-cooled furnace roller according to claim 1 is characterized in that: The spiral support (4) is composed of a plurality of spiral augers with equal pitch, the pitch between the spiral augers is not less than 70 mm, and the thickness of the spiral augers is not less than 6 mm.

8. The long-span, heavy-load descaling water-cooled furnace roller according to claim 1 is characterized in that: The spiral support (4) is made of heat-resistant steel.

9. A long-span, heavy-load-bearing, descaling water-cooled furnace roller, comprising a roller shaft (1), a conical transition body (2) and a furnace roller (3), wherein both ends of the furnace roller (3) are connected to the conical transition body (2), and the conical transition body (2) is connected to the roller shaft (1), characterized in that: The inner wall of the furnace roller (3) is connected with a spiral support (4) in a rotating manner. A load-bearing roller (5) is fixed at the central axis position of the spiral support (4). An axis cavity is provided at the central axis position of the load-bearing roller (5). A support frame (6) is fixed on the wall of the axis cavity. A water-dividing load-bearing transmission rod (7) is fixed at the axis center of the support frame (6). The water-dividing load-bearing transmission rod (7) passes through the roller shaft (1) on the water outlet side of the long-span, large-load-bearing descaling water-cooled furnace roller and is exposed to the outside. The water-dividing load-bearing transmission rod (7) passes through the roller shaft (1) on the water outlet side of the long-span, large-load-bearing descaling water-cooled furnace roller and passes through a rotary joint (15) to be connected to a motor rotation drive device (16). The roller shaft (1) on the water outlet side is connected to the rotary joint (15), and the rotary joint (15) is connected to the motor rotation drive device (16). Stone support rods are fixed at both ends of the inner wall of the furnace roller (3). The graphite thrust ring (11) is provided with a spiral support (4) in sliding contact with the graphite thrust ring (11); the graphite thrust ring (11) comprises an inner ring (111) and an outer ring (113); a side ring (112) is fixed between the inner ring (111) and the outer ring (113); the inner side of the side ring (112) is connected to a plane bearing (117); the inner side of the plane bearing (117) is connected to a partition ring (116); the partition ring (116) is fixed to the inner side of the plane bearing (117); The inner side of the ring (116) is connected to the graphite ring (115), and the inner side of the graphite ring (115) is crimped with a pressure ring (114). The pressure ring (114) is arranged between the inner ring (111) and the outer ring (113), and the pressure ring (114) is rotatably connected to the inner ring (111) and the outer ring (113). The outer ring (113) is fixedly connected to the inner wall of the furnace roller (3), and the pressure ring (114) is in sliding contact with the spiral support (4).

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