Roller cooling structure

Abstract

The present invention discloses a roller cooling structure, which relates to the technical field of high-temperature solid particle crushing, briquetting or compacting equipment for coal, metal, mining, chemical industry, etc. The roller cooling structure provided by the present invention first cools half of the roller surface in the forward direction, and then cools the other half of the roller surface in the reverse direction. Compared with the traditional structure, the roller is cooled in sequence along the circumferential direction of the roller, so that the temperature difference on the circumference of the roller and the roller surface is smaller, and the dimensional expansion value caused by the temperature difference during roller cooling is effectively reduced, thereby improving the operating life and reliability of the roller.

Description

Technical Field

[0001] The present invention relates to the technical field of high-temperature solid particle crushing, briquetting or compacting equipment for coal, metal, mining, chemical industry and the like, and in particular to a roller cooling structure. Background Art

[0002] Roller presses are used in industries such as coal, metals, mining, and chemicals to crush, briquette, or compact solid materials, significantly reducing energy consumption and achieving high efficiency, thus meeting national energy conservation and environmental protection requirements. To reduce process steps and energy consumption, these presses must directly process uncooled, high-temperature materials ranging from 100°C to 800°C. Therefore, appropriate media and methods are required to cool the rollers and roller surfaces to reduce the impact of high temperatures on the rollers and bearings, thereby increasing their service life and reliability.

[0003] Existing roller cooling technology typically circulates downstream along the roller surface. This means that cooling water flows from the water inlet along the roller's circumference, gradually increasing in temperature. After cooling the roller surface for one full circle, the water flows out of the water outlet. Because the outlet is located next to the water inlet and its temperature is consistently higher than the inlet, the significant temperature difference leads to a significant differential in the thermal expansion of the metal material at this location. This results in the roller's lowest post-cooling temperature at the water inlet, while the roller and roller surface temperatures near the cooling water outlet are higher. This results in a significant differential in the thermal expansion of the metal material at the highest and lowest temperature points, impacting the roller's operating life and reliability. Summary of the Invention

[0004] The purpose of the present invention is: to address the above-mentioned problems, the present invention provides a roller cooling structure, which, through segmented cooling, makes the temperature difference on the circumference of the roller and the roller surface smaller, effectively reduces the dimensional expansion value caused by the temperature difference when the roller is cooled, so as to improve the operating life and reliability of the roller.

[0005] The technical solution adopted in the present invention is as follows:

[0006] A roller cooling structure includes a roller, a cooling water system is provided on the roller, and outer ring distribution parts are respectively provided at both ends of the roller surface in the axial direction of the roller, and the cooling water system includes a roller surface cooling water channel for cooling the roller surface along the circumferential direction, and a cooling circulation channel provided on the outer ring distribution part. The roller surface cooling water channel matches the roller surface and is provided below the roller surface; the roller surface cooling water channel includes a first-stage roller surface cooling water channel, a second-stage roller surface cooling water channel, a conversion water channel and a return water channel. The first-stage roller surface cooling water channel The water channel and the two-stage roller surface cooling water channel correspond to half of the roller surface respectively. The one-stage roller surface cooling water channel and the two-stage roller surface cooling water channel are arranged in conjunction with each other. The water inlet end A of the one-stage roller surface cooling water channel corresponds to the water inlet end C of the two-stage roller surface cooling water channel. The water outlet end B of the one-stage roller surface cooling water channel corresponds to the water outlet end D of the two-stage roller surface cooling water channel. The conversion water channel and the return water channel are arranged between the water inlet end A of the one-stage roller surface cooling water channel and the water inlet end C of the two-stage roller surface cooling water channel. The cooling circulation channel includes a semicircular The first section of the annular circulating cooling water channel, the second section of the semicircular circulating cooling water channel, and the third section of the annular circulating cooling water channel are arranged on one side of the roller shaft, and the third section of the circulating cooling water channel is arranged on the other side of the roller shaft. The first section of the circulating cooling water channel corresponds to the first section of the roller surface cooling water channel. The water inlet end of the first section of the circulating cooling water channel is connected to the water outlet end B of the first section of the roller surface cooling water channel through a jump water pipe, and the water outlet end is connected to the second section of the roller surface cooling water channel through a jump water pipe. The water inlet end C of the cooling water channel is connected, the water inlet end of the two-stage circulating cooling water channel is connected with the water outlet end D of the two-stage roller surface cooling water channel through a jump water pipe, and the water outlet end is connected with the water inlet end E of the conversion water channel through a jump water pipe. The water inlet end of the three-stage circulating cooling water channel is connected with the water outlet end F of the conversion water channel through a jump water pipe, and the water outlet end is connected with the water inlet end G of the return water channel through a jump water pipe; the water inlet end A of the one-stage roller surface cooling water channel is connected with the water supply water channel, and the water outlet end H of the return water channel is connected with the water outlet water channel.

[0007] Furthermore, the one-stage roller surface cooling water channel forms a first roller surface cooling section in the forward direction, the one-stage circulating cooling water channel forms a first circulating cooling section in the reverse direction, the two-stage roller surface cooling water channel forms a second roller surface cooling section in the reverse direction, the two-stage circulating cooling water channel forms a second circulating cooling section in the forward direction, and the three-stage circulating cooling water channel forms a third circulating cooling section in the reverse direction. The cooling water passes through the first roller surface cooling section, the first circulating cooling section, the second roller surface cooling section, the second circulating cooling section, the conversion water channel, the third circulating cooling section and the return water channel in sequence.

[0008] Furthermore, the roller surface cooling water channel is formed by multiple axial water channels evenly spaced along the circumferential direction, and the ends of adjacent axial water channels can be connected through a circuitous structure to form an S-shaped structure; the axial water channel from the water inlet end A to the water outlet end B forms a one-section roller surface cooling water channel; the axial water channel from the water inlet end C to the water outlet end D forms a two-section roller surface cooling water channel; the two ends of a single axial water channel are respectively the water inlet end E and the water outlet end F, forming a conversion water channel; the axial water channel from the water inlet end G to the water outlet end H is a return water channel, and the one-section roller surface cooling water channel, the two-section roller surface cooling water channel, the conversion water channel and the return water channel are arranged in sequence along the circumferential direction.

[0009] Furthermore, distribution rings are respectively provided at both ends of the roller shaft in the axial direction, and the detour structure is provided on the distribution ring. The detour structure is located on the side where the distribution ring matches the roller shaft. The detour structure is a plurality of connecting grooves corresponding to the roller surface cooling water channels, and each connecting groove can connect adjacent axial water channels from the end.

[0010] Furthermore, the water inlet end A and the water outlet end H are spaced apart and arranged in the middle of the same axial water channel, and the water inlet end A and the water outlet H are radially connected to the main shaft water channel at the central axis of the roller shaft.

[0011] Furthermore, the spindle water channel includes a main water channel inner hole located at the central axis of the roller shaft, a water supply pipe and a water channel blocking structure; the water supply pipe extends into the main water channel inner hole, the diameter of the water supply pipe is smaller than the diameter of the main water channel inner hole, the water supply pipe and the main water channel inner hole are coaxially arranged, an annular water channel is formed between the water supply pipe and the main water channel inner hole, a water supply gap is provided between the extending end of the water supply pipe and the bottom end of the main water channel inner hole, and the cooling water in the water supply pipe can flow into the annular water channel through the water supply gap; the water channel blocking structure The blocking structure is sleeved on the water supply pipe. The water channel blocking structure is located in the annular water channel and divides the annular water channel into a water supply channel and a water outlet channel. The water supply channel is the side of the annular water channel close to the water supply pipe insertion end, and the water outlet channel is the side of the annular water channel away from the water supply pipe insertion end; the water supply port and the water outlet of the annular water channel are respectively located on both sides of the blocking structure, and the water supply channel is radially connected to the water inlet end A through the water supply port, and the water outlet channel is radially connected to the water outlet end H through the water outlet.

[0012] Furthermore, the water outlet end B, the water inlet end C, the water outlet end D and the water inlet end E are located on the same side of the roller shaft, and the water outlet end F and the water inlet end G are located on the other side of the roller shaft.

[0013] Furthermore, both ends of the roller shaft along the axial direction are rotatably connected to the frame through bearings, and the depth of the inner hole of the main water channel matches the distance between the two bearings.

[0014] Furthermore, the open end of the inner hole of the main water channel is connected to the cooling water inlet and outlet device through a sealing structure, and the cooling water inlet and outlet device is provided with independent water supply pipes and outlet pipes. The cooling water in the outlet water channel is discharged along the water outlet through the outlet pipe of the cooling water inlet and outlet device, and the cooling water enters the water supply pipe of the cooling water inlet and outlet device through the water inlet, and then flows into the water supply pipe.

[0015] Furthermore, the roller surface of the roller shaft may be surrounded by a slicing roller or a roller sleeve, and the outer ring distribution portion may serve as a clamping ring to constrain the end of the slicing roller or the roller sleeve.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] 1. The present invention first cools half of the roller surface in the forward direction and then cools the other half in the reverse direction. Compared with the traditional structure that cools the roller in sequence along the circumference of the roller, the temperature difference between the roller and the roller surface on the circumference is smaller, effectively reducing the dimensional expansion value caused by the temperature difference when the roller is cooled, thereby improving the operating life and reliability of the roller.

[0018] 2. The present invention can effectively adjust the cooling area and cooling water flow direction of the roller surface cooling water channel through the outer ring distribution part.

[0019] 3. The present invention provides a circuitous structure for multiple axial water channels through a distribution ring, which is simple in design and easy to process and produce.

[0020] 4. The roller surface cooling water channel of the present invention is arranged in a circuitous S-shaped structure, with high cooling efficiency and small temperature difference on the circumference. The structure has good adaptability to the roller surface width and can adapt to rollers of different widths.

[0021] 5. The present invention can effectively separate the water supply channel and the water outlet channel through the water channel blocking structure, and can realize the independent operation of the water supply channel and the water outlet channel through the single opening structure.

[0022] 6. The outer ring distribution portion of the present invention can be used as a clamping ring to constrain the end of the slicing roller or roller sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a cross-sectional view of the roller cooling structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the roller of the present invention;

[0025] Figure 3 This is a cooling water flow path diagram of the roller surface cooling water channel expanded along the circumferential direction of the present invention;

[0026] Figure 4 The present invention is about Figure 2 Cross-sectional view of AA;

[0027] Figure 5 The present invention is about Figure 2 Cross-section diagram of BB;

[0028] Figure 6 The present invention is about Figure 2 Cross-sectional view of CC;

[0029] Figure 7 The present invention is about Figure 2 Cross-sectional view of DD;

[0030] Figure 8 It is a schematic diagram of the cooling sequence of the present invention.

[0031] Markings in the figure: 1-roller shaft, 2-outer ring distribution part, 3-roller surface cooling water channel, 301-first stage roller surface cooling water channel, 302-second stage roller surface cooling water channel, 303-conversion water channel, 304-return water channel, 305-axial water channel, 306-circuitous structure, 4-cooling circulation channel, 401-first stage circulation cooling water channel, 402-second stage circulation cooling water channel, 403-third stage circulation cooling water channel, 5-jump water pipe, 6-distribution ring, 7-spindle water channel, 701-main water channel inner hole, 702-water supply pipe, 703-water channel blocking structure, 704-water supply water channel, 705-outlet water channel, 8-bearing, 9-slicing roller, 10-cooling water inlet and outlet device, 11-water outlet, 12-water inlet. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below with reference to the accompanying drawings.

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] Example 1

[0035] A roller cooling structure, such as Figure 1-8As shown, it includes a roller shaft 1, and a cooling water system is provided at the roller shaft 1. The roller surface of the roller shaft 1 is provided with an outer ring distribution part 2 arranged around the roller shaft 1 at both ends of the roller surface axial direction. The cooling water system includes a roller surface cooling water channel 3 for cooling the roller surface along the circumferential direction, and a cooling circulation channel 4 arranged at the outer ring distribution part 2. The roller surface cooling water channel 3 matches the roller surface and is arranged below the roller surface; the roller surface cooling water channel 3 includes a first-stage roller surface cooling water channel 301, a second-stage roller surface cooling water channel 302, a conversion water channel 303 and a return water channel 304. The first-stage roller surface cooling water channel 301 and the second-stage roller surface cooling water channel 302 are respectively provided with an outer ring distribution part 2 arranged around the roller surface 1. 02 respectively correspond to half of the roller surface, the first roller surface cooling water channel 301 and the second roller surface cooling water channel 302 are arranged in conjunction with each other, the water inlet end A of the first roller surface cooling water channel 301 corresponds to the water inlet end C of the second roller surface cooling water channel 302, the water outlet end B of the first roller surface cooling water channel 301 corresponds to the water outlet end D of the second roller surface cooling water channel 302, the conversion water channel 303 and the return water channel 304 are arranged between the water inlet end A of the first roller surface cooling water channel 301 and the water inlet end C of the second roller surface cooling water channel 302; the cooling circulation channel 4 includes a semicircular ring-shaped first section of the circulation cooling water channel The water channel 401, the two-stage circulating cooling water channel 402 in the shape of a semicircular ring, and the three-stage circulating cooling water channel 403 in the shape of a circular ring, the one-stage circulating cooling water channel 401 and the two-stage circulating cooling water channel 402 are arranged on one side of the roller shaft 1, and the three-stage circulating cooling water channel 403 is arranged on the other side of the roller shaft 1. The one-stage circulating cooling water channel 401 corresponds to the one-stage roller surface cooling water channel 301. The water inlet end of the one-stage circulating cooling water channel 401 is connected to the water outlet end B of the one-stage roller surface cooling water channel 301 through the jump water pipe 5, and the water outlet end is connected to the two-stage roller surface cooling water channel 302 through the jump water pipe 5. The water inlet end C of the second-stage circulating cooling water channel 402 is connected to the water outlet end D of the second-stage roller surface cooling water channel 302 through the jump water pipe 5, and the water outlet end is connected to the water inlet end E of the conversion water channel 303 through the jump water pipe 5. The water inlet end of the three-stage circulating cooling water channel 403 is connected to the water outlet end F of the conversion water channel 303 through the jump water pipe 5, and the water outlet end is connected to the water inlet end G of the return water channel 304 through the jump water pipe 5; the water inlet end A of the first-stage roller surface cooling water channel 301 is connected to the water supply water channel 704, and the water outlet end H of the return water channel 304 is connected to the water outlet water channel 705. Figure 6 and Figure 7 It can be seen that the number of jump water pipes 5 on the two sides is different. There are four jump water pipes 5 on the CC view side and two jump water pipes 5 on the DD view side.

[0036] like Figure 8As shown, the first section of roller surface cooling water channel 301 forms the first roller surface cooling section in the forward direction, the first section of circulating cooling water channel 401 forms the first circulating cooling section in the reverse direction, the second section of roller surface cooling water channel 302 forms the second roller surface cooling section in the reverse direction, the second section of circulating cooling water channel 402 forms the second circulating cooling section in the forward direction, and the third section of circulating cooling water channel 403 forms the third circulating cooling section in the reverse direction. The cooling water passes through the first roller surface cooling section, the first circulating cooling section, the second roller surface cooling section, the second circulating cooling section, the conversion water channel 303, the third circulating cooling section and the return water channel 304 in sequence. Since the third circulating cooling section is on the other side of the roller shaft 1 in the axial direction, Figure 8 Indicated by dotted lines.

[0037] The roller surface cooling water channel 3 is formed by a plurality of axial water channels 305 uniformly spaced along the circumferential direction, and the ends of adjacent axial water channels 305 can be connected through a circuitous structure 306 to form an S-shaped structure; the axial water channel 305 from the water inlet end A to the water outlet end B forms a section of the roller surface cooling water channel 301; the axial water channel 305 from the water inlet end C to the water outlet end D forms a two-section roller surface cooling water channel 302; the two ends of a single axial water channel 305 are respectively the water inlet end E and the water outlet end F, forming a conversion water channel 303; the axial water channel 305 from the water inlet end G to the water outlet end H is a return water channel 304, and the one-section roller surface cooling water channel 301, the two-section roller surface cooling water channel 302, the conversion water channel 303 and the return water channel 304 are arranged in sequence along the circumferential direction.

[0038] Distribution rings 6 are respectively provided at both ends of the roller shaft 1 in the axial direction. The detour structure 306 is provided on the distribution ring 6. The detour structure 306 is located on the side where the distribution ring 6 matches the roller shaft 1. The detour structure 306 is a plurality of connecting grooves corresponding to the roller surface cooling water channel 3. Each connecting groove can connect the adjacent axial water channels 305 from the end.

[0039] The water inlet end A and the water outlet end H are spaced apart and arranged in the middle of the same axial water channel 305 , and the water inlet end A and the water outlet H are radially connected to the main shaft water channel 7 at the central axis of the roller shaft 1 .

[0040] The spindle water channel 7 includes a main water channel inner hole 701 located at the central axis of the roller shaft 1, a water supply pipe 702 and a water channel blocking structure 703; the water supply pipe 702 extends into the main water channel inner hole 701, the diameter of the water supply pipe 702 is smaller than the diameter of the main water channel inner hole 701, the water supply pipe 702 is coaxially arranged with the main water channel inner hole 701, and an annular water channel is formed between the water supply pipe 702 and the main water channel inner hole 701, and a water supply gap is provided between the extending end of the water supply pipe 702 and the bottom end of the main water channel inner hole 701, and the cooling water in the water supply pipe 702 can flow into the annular water channel through the water supply gap; The water channel blocking structure 703 is sleeved on the water supply pipe 702. The water channel blocking structure 703 is located in the annular water channel and divides the annular water channel into a water supply channel 704 and an outlet water channel 705. The water supply channel 704 is the side of the annular water channel close to the insertion end of the water supply pipe 702, and the outlet water channel 705 is the side of the annular water channel away from the insertion end of the water supply pipe 702; the water supply port and the water outlet of the annular water channel are respectively located on both sides of the blocking structure, and the water supply channel 704 is radially connected to the water inlet end A through the water supply port, and the water outlet channel 705 is radially connected to the water outlet end H through the water outlet.

[0041] like Figure 4 As shown, the water outlet B, water inlet C, water outlet D and water inlet E are located on the same side of the roller shaft 1, as shown in FIG. Figure 5 As shown, the water outlet F and the water inlet G are located on the other side of the roller shaft 1. The other end of the axial water channel 305 corresponding to the water outlet B is indicated as B', the other end of the axial water channel 305 corresponding to the water outlet C is indicated as C', and the other end of the axial water channel 305 corresponding to the water outlet D is indicated as D'.

[0042] The roller shaft 1 is rotatably connected to the frame at both ends along the axial direction via bearings 8 , and the depth of the main water channel inner hole 701 matches the distance between the two bearings 8 .

[0043] The open end of the inner hole 701 of the main water channel is connected to the cooling water inlet and outlet device 10 through a sealing structure. The cooling water inlet and outlet device 10 is provided with independent water supply pipes and outlet pipes. The cooling water in the outlet waterway 705 is discharged along the water outlet 11 through the outlet pipe of the cooling water inlet and outlet device 10. The cooling water enters the water supply pipe of the cooling water inlet and outlet device 10 through the water inlet 12, and then flows into the water supply pipe 702.

[0044] The roller surface of the roller shaft 1 can be surrounded by a slicing roller 9 or a roller sleeve, and the outer ring distribution portion 2 can serve as a clamping ring to constrain the end of the slicing roller 9 or the roller sleeve. In this embodiment, the slicing roller 9 is mounted on the roller shaft 1, and the outer ring distribution portion 2 radially presses the axial end of the slicing roller 9 to constrain the slicing roller 9.

[0045] The principles and implementation methods of the present invention are described herein using specific embodiments. The description of the above embodiments is intended only to facilitate understanding of the method and core concept of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0046] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0047] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

Claims

1. A roller cooling structure, comprising a roller, wherein a cooling water system is provided at the roller, characterized in that: The roller surface of the roller shaft is provided with an outer ring distribution part arranged around the roller shaft at both ends in the axial direction. The cooling water system includes a roller surface cooling water channel for cooling the roller surface along the circumferential direction and a cooling circulation channel arranged on the outer ring distribution part. The roller surface cooling water channel matches the roller surface and is arranged below the roller surface. The roller surface cooling water channel is formed by a plurality of axial water channels evenly spaced along the circumferential direction. The ends of adjacent axial water channels can be connected through a circuitous structure to form an S-shaped structure. The roller surface cooling water channel includes a first-stage roller surface cooling water channel, a second-stage roller surface cooling water channel, a conversion water channel and a return water channel. The first roller surface cooling water channel and the second roller surface cooling water channel correspond to half of the roller surface respectively. The first roller surface cooling water channel and the second roller surface cooling water channel are arranged in conjunction with each other. The water inlet end A of the first roller surface cooling water channel corresponds to the water inlet end C of the second roller surface cooling water channel. The water outlet end B of the first roller surface cooling water channel corresponds to the water outlet end D of the second roller surface cooling water channel. The conversion water channel and the return water channel are arranged between the water inlet end A of the first roller surface cooling water channel and the water inlet end C of the second roller surface cooling water channel. The cooling circulation channel includes a semicircular ring. The first section of the circulating cooling water channel, the second section of the semicircular circulating cooling water channel, and the third section of the circular circulating cooling water channel are arranged on one side of the roller shaft, and the third section of the circulating cooling water channel is arranged on the other side of the roller shaft. The first section of the circulating cooling water channel corresponds to the first section of the roller surface cooling water channel. The water inlet end of the first section of the circulating cooling water channel is connected to the water outlet end B of the first section of the roller surface cooling water channel through a jump water pipe, and the water outlet end of the first section of the circulating cooling water channel is connected to the inlet end of the second section of the roller surface cooling water channel through a jump water pipe. The water end C is connected, the water inlet end of the two-stage circulating cooling water channel is connected with the water outlet end D of the two-stage roller surface cooling water channel through a jump water pipe, the water outlet end of the two-stage circulating cooling water channel is connected with the water inlet end E of the conversion water channel through a jump water pipe, the water inlet end of the three-stage circulating cooling water channel is connected with the water outlet end F of the conversion water channel through a jump water pipe, and the water outlet end of the three-stage circulating cooling water channel is connected with the water inlet end G of the return water channel through a jump water pipe; the water inlet end A of the one-stage roller surface cooling water channel is connected with the water supply water channel, and the water outlet end H of the return water channel is connected with the water outlet water channel.

2. The roller cooling structure according to claim 1, wherein: The one-stage roller surface cooling water channel forms the first roller surface cooling section in the forward direction, the one-stage circulating cooling water channel forms the first circulating cooling section in the reverse direction, the two-stage roller surface cooling water channel forms the second roller surface cooling section in the reverse direction, the two-stage circulating cooling water channel forms the second circulating cooling section in the forward direction, and the three-stage circulating cooling water channel forms the third circulating cooling section in the reverse direction. The cooling water passes through the first roller surface cooling section, the first circulating cooling section, the second roller surface cooling section, the second circulating cooling section, the conversion water channel, the third circulating cooling section and the return water channel in sequence.

3. The roller cooling structure according to claim 1 or 2, characterized in that: The axial water channel from the water inlet end A to the water outlet end B forms a first-stage roller surface cooling water channel; the axial water channel from the water inlet end C to the water outlet end D forms a second-stage roller surface cooling water channel; the two ends of a single axial water channel are respectively the water inlet end E and the water outlet end F, forming a conversion water channel; the axial water channel from the water inlet end G to the water outlet end H is a return water channel. The first-stage roller surface cooling water channel, the second-stage roller surface cooling water channel, the conversion water channel and the return water channel are arranged in sequence along the circumferential direction.

4. The roller cooling structure according to claim 3, characterized in that: Distribution rings are respectively provided at both ends of the roller axis direction, and the detour structure is provided on the distribution ring. The detour structure is located on the side where the distribution ring matches the roller axis. The detour structure is a plurality of connecting grooves corresponding to the roller surface cooling water channels, and each connecting groove can connect adjacent axial water channels from the end.

5. The roller cooling structure according to claim 3, characterized in that: The water inlet end A and the water outlet end H are spaced apart and arranged in the middle of the same axial water channel. The water inlet end A and the water outlet H are radially connected to the main shaft water channel at the central axis of the roller shaft.

6. The roller cooling structure according to claim 5, characterized in that: The spindle water channel comprises a main water channel inner hole located at the central axis of the roller shaft, a water supply pipe and a water channel blocking structure; the water supply pipe extends into the main water channel inner hole, the diameter of the water supply pipe is smaller than the diameter of the main water channel inner hole, the water supply pipe and the main water channel inner hole are coaxially arranged, an annular water channel is formed between the water supply pipe and the main water channel inner hole, a water supply gap is provided between the extending end of the water supply pipe and the bottom end of the main water channel inner hole, and the cooling water in the water supply pipe can flow into the annular water channel through the water supply gap; the water channel blocking structure The structure is sleeved on the water supply pipe, and the water channel blocking structure is located in the annular water channel and divides the annular water channel into a water supply channel and a water outlet channel. The water supply channel is the side of the annular water channel close to the water supply pipe insertion end, and the water outlet channel is the side of the annular water channel away from the water supply pipe insertion end; the water supply port and the water outlet of the annular water channel are respectively located on both sides of the blocking structure, and the water supply channel is radially connected to the water inlet end A through the water supply port, and the water outlet channel is radially connected to the water outlet end H through the water outlet.

7. The roller cooling structure according to claim 3, wherein: The water outlet end B, the water inlet end C, the water outlet end D and the water inlet end E are located on the same side of the roller shaft, and the water outlet end F and the water inlet end G are located on the other side of the roller shaft.

8. The roller cooling structure according to claim 6, wherein: The roller shaft is rotatably connected to the frame at both ends along the axis direction via bearings, and the depth of the inner hole of the main water channel matches the distance between the two bearings.

9. The roller cooling structure according to claim 6, wherein: The open end of the inner hole of the main water channel is connected to the cooling water inlet and outlet device through a sealing structure. The cooling water inlet and outlet device is provided with independent water supply pipes and outlet pipes. The cooling water in the outlet water channel is discharged along the water outlet through the outlet pipe of the cooling water inlet and outlet device. The cooling water enters the water supply pipe of the cooling water inlet and outlet device through the water inlet and then flows into the water supply pipe.

10. The roller cooling structure according to claim 1, wherein: The roller surface of the roller shaft can be surrounded by a slicing roller or a roller sleeve, and the outer ring distribution portion can be used as a clamping ring to constrain the end of the slicing roller or the roller sleeve.

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