CN218744748U - Peripheral groove nanocrystalline crystallizer cooling structure - Google Patents

Abstract

The utility model provides a peripheral groove nanocrystalline crystallizer cooling structure, which comprises a main shaft, an axis structure and a copper sleeve, wherein the axis structure is sleeved on the main shaft, and the copper sleeve is sleeved on the outer edge of the axis structure; one end of the main shaft is a hollow water inlet end, and the other end of the main shaft is a hollow water outlet end; a water inlet gland and a water outlet gland are respectively arranged on two sides of the axis structure; the axis structure is provided with a water inlet pressure stabilizing cavity and a water outlet pressure stabilizing cavity; a plurality of cooling groove groups with the same specification are arranged on the copper sleeve at equal intervals along the circumferential direction of the inner surface of the copper sleeve, one end of each cooling groove group is communicated with the water inlet pressure stabilizing cavity, and the other end of each cooling groove group is communicated with the water outlet pressure stabilizing cavity; and the middle part of each cooling groove group is provided with a cooling water turbulence structure. The utility model relates to an axial cooling is even, water conservation, efficient circumference groove nanocrystalline crystallizer cooling structure for preparing nanocrystalline wide strip.

Description

Peripheral groove nanocrystalline crystallizer cooling structure

Technical Field

The utility model relates to a nanocrystalline wide strip preparation technique and production facility subassembly field, concretely relates to circumference groove nanocrystalline crystallizer cooling structure.

Background

The crystallizer used in the process of preparing the nanocrystalline strip is a circulating water-cooled nanocrystalline crystallizer widely used. A common nanocrystalline crystallizer in the prior art is in a transverse groove structure (as shown in fig. 1-4), that is, the direction of a copper bush cooling groove is the same as the axial direction of a main shaft, and cooling water cools the copper bush along the axial direction. The cooling characteristic of this kind of transverse groove structure copper sheathing does: the cooling capacity of the water inlet end is strong (characterized by convective heat transfer coefficient): according to hydromechanics, the water inlet end of the water tank is a flow inlet section, and the convective heat transfer capacity is obviously higher than that of a later development section; the water temperature at the water inlet end is low: when cooling water flows through the transverse groove, heat is absorbed, and the water temperature at the water inlet end is naturally low; the temperature of the roller surface (the outer surface of the copper roller) at the water inlet end is low: the cooling capacity of the water inlet end is high, the water temperature is low, and the roller surface temperature of the water inlet end is low; the cooling power of the water inlet end is large: at the moment when the molten steel touches the roller, the roller surface temperature at the water inlet end is low, so that the cooling power of the molten steel at the water inlet end is high. In the peripheral groove nanocrystalline crystallizer with the transverse groove structure, when molten steel is cooled on the roller surface, the cooling capacity and the cooling power of the water inlet end are obviously stronger than those of the water outlet end, and the molten steel cooling speed of the water inlet end is higher than that of the water outlet end, so that a series of problems are caused, such as: (1) The strip is extremely poor, the strip lamination coefficient is low, the lotus leaf edge is easy to appear on the strip, the strip is easy to break in the strip spraying process, the strip is uneven and asymmetric in thickness along the width direction, the strip magnetic performance is poor, the strip spraying process is difficult to stabilize, the nozzle moves along the axial direction (the copper roller axial direction) during strip spraying to cause that the original process is not applicable, the roller surface width utilization rate is low, and along with the thinning of the copper roller, the heat balance capacity of the copper roller is weakened, and the problem caused by uneven cooling is aggravated. Meanwhile, the nanocrystalline crystallizers in the prior art, including the circumferential groove nanocrystalline crystallizers with transverse groove structures, have the technical problem of high water consumption under the same cooling effect.

SUMMERY OF THE UTILITY MODEL

To the defect that exists among the prior art, the utility model provides an axial cooling is even, water conservation, efficient circumference groove nanocrystalline crystallizer cooling structure for preparing nanocrystalline wide strip.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

the peripheral groove nanocrystalline crystallizer cooling structure comprises a main shaft, an axis structure and a copper sleeve, wherein the axis structure is sleeved on the main shaft, and the copper sleeve is sleeved on the outer edge of the axis structure; one end of the main shaft is a hollow water inlet end, and the other end of the main shaft is a hollow water outlet end; the two sides of the axis structure are respectively provided with a water inlet gland with a water inlet flow passage and a water outlet gland with a water outlet flow passage; a water inlet pressure stabilizing cavity and a water outlet pressure stabilizing cavity are arranged on the axis structure in an annular and equidistant manner; a plurality of cooling groove groups with the same specification are arranged on the copper bush at equal intervals along the circumferential direction of the inner surface of the copper bush, one end of each cooling groove group is communicated with the water inlet pressure stabilizing cavity, and the other end of each cooling groove group is communicated with the water outlet pressure stabilizing cavity; the middle part of each cooling groove group is provided with a cooling water turbulence structure; the water inlet end of the main shaft is communicated with a water inlet flow passage of the water inlet gland, the water outlet end of the main shaft is communicated with a water outlet flow passage, the water inlet pressure stabilizing cavity, the cooling groove group, the water outlet pressure stabilizing cavity and the water outlet flow passage form a complete circumferential copper sleeve cooling group, and a plurality of circumferential copper sleeve cooling groups are circumferentially adjacently arranged to form a circumferential groove nanocrystalline crystallizer cooling structure.

Further, each cooling groove group consists of a plurality of circumferential grooves which are arranged along the circumferential direction of the inner surface of the copper sleeve and have the same axial spacing.

Furthermore, a plurality of pore channels which are opposite to the circumferential grooves and have the same number are arranged at one end of the water inlet pressure stabilizing cavity and one end of the water outlet pressure stabilizing cavity facing the cooling groove group, and the water inlet pressure stabilizing cavity, the pore channels, the circumferential grooves of the cooling groove group and the water outlet pressure stabilizing cavity are communicated to form a cooling realization structure of the copper sleeve circumferential cooling group.

Furthermore, a cooling water inlet and outlet structure of the copper jacket circumferential cooling group is formed by one water inlet pressure stabilizing cavity and one water outlet pressure stabilizing cavity connected with the water inlet pressure stabilizing cavity through the cooling groove group, and a plurality of cooling water inlet and outlet structures with the same specification are circumferentially arranged on the axis structure at equal intervals.

Furthermore, the water inlet and outlet pressure stabilizing cavities axially penetrate through the axis structure, the cross section of each cavity is rectangular or arc-angle rectangular, the length direction of each rectangular or arc-angle rectangular is along the radial direction of the axis structure, and the pressure stabilizing water inlet cavity and the pressure stabilizing water outlet cavity in the cooling water inlet and outlet structure are respectively arranged at intervals with the pressure stabilizing water outlet cavity and the pressure stabilizing water inlet cavity of the adjacent cooling water inlet and outlet structure; the section is a surface which is structurally perpendicular to the axial direction of the main shaft on the axis, and the arc-angle rectangle is a rectangle with four arc-shaped corners.

Further, the vortex structure constitute including setting up in the structural disturbance chute in axle center and inserting the spoiler of locating in the disturbance chute, the bottom of spoiler be provided with the vortex hole that corresponds with the circumference groove in the cooling tank group, the quantity that disturbs the hole promptly is the same with the quantity of circumference groove in every cooling tank group, the structural axial position of axle center of the vortex hole corresponds with the circumference groove in the cooling tank group one-to-one after the spoiler inserts the vortex groove in addition, the both sides that insert the vortex groove at the spoiler after the spoiler are respectively for the intake of the circumference groove intercommunication in with the cooling tank group and disturb the chamber with play water.

Furthermore, the number of the cooling groove groups is 4-8, the wall thickness between adjacent cooling groove groups is 4-8mm, the width of a circumferential groove in each cooling groove group is not less than 4mm, the depth of the circumferential groove in each cooling groove group is not less than 4mm, the axial wall thickness between adjacent circumferential grooves is 4-8mm, and the number of the circumferential grooves is 12-22.

Furthermore, the axial center structure is provided with a sealing plate, a sealing ring and an end cover at two axial ends.

Furthermore, the sealing rings are arranged at the joints of the two sides of the end parts of the copper sleeve and the axle center structure to seal the copper sleeve and the axle center structure, the contact surfaces of the copper sleeve and the axle center structure are secondarily sealed, and in addition, dynamic balance guide rails are used on the sealing rings for installing dynamic balance sliding blocks; the sealing plate is arranged between the main shaft and the gland and used for sealing the contact surface of the gland and the main shaft; the end cover is arranged at one end of the water inlet pressure stabilizing cavity and one end of the water outlet pressure stabilizing cavity, so that the pressure stabilizing cavity only has the function of water inlet or water outlet at one end, and the other end is sealed.

Furthermore, radial pipes are arranged on the main shaft, the pipe diameter is between 30 and 39mm, the radial pipes are uniformly distributed in the circumferential direction, and the number of the radial pipes is the same as that of the water inlet pressure stabilizing cavities or the water outlet pressure stabilizing cavities.

Compared with the prior art, the utility model discloses the beneficial effect who possesses does:

the utility model discloses a with copper sheathing inside share a plurality of the same blocks, the same cooling structure of every design, it has periodicity along the circumferencial direction to reach the roll surface cooling of whole crystallizer from this, namely copper sheathing inner wall set up the circumference groove as circumference cooling structure, this structure can realize that cooling water is equal basically to the heat transfer coefficient along width direction (axial) on the copper sheathing contact surface, cooling power axial distribution is even (the unevenness is less than 8%), cooling power axial evenly distributed, cooling power circumference has periodicity, guarantee that width direction cooling rate is even, cooling speed is fast, do benefit to stable in process, can overcome the problem that cross slot structure nanocrystalline crystallizer exists of prior art broken belt, the range is big, the lamination coefficient is low, magnetic performance is poor, thereby can utilize the copper roller surface to spout the area on copper sheathing surface jet system broadband and can the at utmost; the nozzle is allowed to move along the axial direction, the utilization rate of the copper roller is high, and the circumferential periodicity of the cooling of the surface of the whole cooling roller is ensured through a unique blocked circular arc-shaped cooling structure, so that the stability of the strip spraying process is ensured; the pressure stabilizing water cavity is arranged into a circumferentially symmetrical pressure stabilizing water cavity system, and relatively uniform prestress can be generated after the copper sleeve is assembled, so that stress concentration is prevented, and pocking marks are prevented; meanwhile, the circumferentially symmetrical pressure stabilizing water cavity system can effectively reduce the flow velocity in the cavity, stabilize the pressure of water inlet and outlet and ensure the pressure equality in the water inlet cavity and the water outlet cavity; in addition, under the same cooling effect, the utility model discloses a peripheral groove nanocrystalline crystallizer cooling structure can save water 50%, cooling effect when can realize the 200t/h flow with 100 t/h's flow if.

Drawings

FIG. 1 is a cross-sectional view of a cross-sectional structure of a nanocrystalline crystallizer of a prior art;

FIG. 2 isbase:Sub>A schematic view of the cross-sectional structure A-A of FIG. 1;

FIG. 3 is a schematic diagram of a copper jacket structure of a nanocrystalline crystallizer with a transverse groove structure in the prior art;

FIG. 4 is a schematic cross-sectional view of the structure of FIG. 3 taken along line B-B;

fig. 5 is a schematic cross-sectional structure of the present invention;

FIG. 6 is a schematic view of the cross-sectional structure C-C of FIG. 5;

FIG. 7 is a schematic view of a copper sleeve structure;

FIG. 8 is a schematic cross-sectional view of an axial structure;

FIG. 9 is a schematic view of the cross-sectional structure of FIG. 8 taken along line D-D;

FIG. 10 is a schematic view of the cross-sectional structure E-E of FIG. 8;

FIG. 11 is a perspective view of an axial structure;

FIG. 12 is a schematic view of a spoiler structure;

FIG. 13 is a schematic view of an end cap construction;

FIG. 14 is a schematic view of a gland structure, in which the end cap is exemplified by a water inlet end cap, and the water outlet end cap and the water inlet end cap have the same structure;

fig. 15 is a schematic view of the spindle structure.

In the figure, 1-main shaft, 11-water inlet end, 12-water outlet end, 13-radial pipe, 2-axle center structure, 21-water inlet pressure stabilizing cavity, 22-water outlet pressure stabilizing cavity, 23-pore channel, 24-concave ring, 3-copper sleeve, 31-cooling groove group, 311-circumferential groove, 41-water inlet gland, 411-water inlet runner, 42-water outlet gland, 421-water outlet runner, 5-cooling water turbulence structure, 51-turbulence groove, 52-turbulence plate, 53-turbulence hole, 54-water inlet turbulence cavity, 55-water outlet turbulence cavity, 6-first sealing ring, 7-second sealing ring and 8-end cover.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 5-6 and 8-11, the cooling structure of the peripheral groove nanocrystalline crystallizer of the present invention includes a main shaft 1, an axial structure 2 and a copper sleeve 3, wherein the axial structure 2 is sleeved on the main shaft 1, the copper sleeve 3 is sleeved on the outer edge of the axial structure 2, and the copper sleeve 3 is connected with the axial structure 2 in a fitting manner through interference connection; one end of the main shaft 1 is a hollow water inlet end 11, and the other end of the main shaft is a hollow water outlet end 12; a water inlet gland 41 (shown in fig. 14) with a water inlet channel 411 arranged therein and a water outlet gland 42 with a water outlet channel 421 arranged therein are respectively arranged on two sides of the axis structure 2; a water inlet pressure stabilizing cavity 21 and a water outlet pressure stabilizing cavity 22 are arranged on the axis structure 2 in an annular and equidistant manner; as shown in fig. 7, a plurality of cooling groove groups 31 with the same specification are arranged on the copper bush 3 at equal intervals along the circumferential direction of the inner surface of the copper bush 3, one end of each cooling groove group 31 is communicated with the water inlet pressure stabilizing cavity 21, and the other end of each cooling groove group 31 is communicated with the water outlet pressure stabilizing cavity 22; the middle part of each cooling groove group 31 is provided with a cooling water turbulent flow structure 5; the water inlet end 11 of the main shaft 1 is communicated with the water inlet flow passage 411 of the water inlet gland 41, the water outlet end 12 is communicated with the water outlet flow passage 421, the water inlet flow passage 411, the water inlet pressure stabilizing cavity 21, the cooling groove group 31, the water outlet pressure stabilizing cavity 22 and the water outlet flow passage 421 form a complete copper bush circumferential cooling group, and a plurality of copper bush circumferential cooling groups are circumferentially adjacently arranged to form a circumferential groove nanocrystalline crystallizer cooling structure. The water inlet pressure stabilizing cavity 21 of the copper sleeve circumferential cooling group is adjacent to the water outlet pressure stabilizing cavity 22 of the adjacent copper sleeve circumferential cooling group, and the positions of the water inlet pressure stabilizing cavity 21 and the water outlet pressure stabilizing cavity 22 on the axis structure 2 are equal to the center of the axis structure 2; the water inlet flow passage 411 on the water inlet gland 41 arranged on one side of the water inlet end 11 of the main shaft is connected with the water inlet end 11 of the main shaft and the water inlet pressure stabilizing cavity 21 of the shaft center structure, and the water outlet flow passage 421 on the water outlet gland 42 arranged on one side of the water outlet end 12 of the main shaft is connected with the water outlet end 12 of the main shaft and the water outlet pressure stabilizing cavity 22 of the shaft center structure. The water outlet gland is connected with the water outlet end and is responsible for leading cooling water to the main shaft from the water outlet pressure stabilizing cavity or leading the cooling water to the water inlet pressure stabilizing cavity from the main shaft, and the water outlet gland is characterized by comprising a relatively long radial flow channel; meanwhile, the gland also plays a role in end face static sealing.

Further, each of the cooling groove groups 31 is composed of a plurality of circumferential grooves 311 arranged circumferentially along the inner surface of the copper jacket 3 at equal axial intervals.

Furthermore, a plurality of pore channels 23 which are opposite to the circumferential groove 311 and have the same number are arranged at one end of the water inlet pressure stabilizing cavity 21 and the water outlet pressure stabilizing cavity 22 facing the cooling groove group 31, and the water inlet pressure stabilizing cavity 21, the pore channels 23, the circumferential groove 311 of the cooling groove group 31 and the water outlet pressure stabilizing cavity 22 are communicated to form a cooling realization structure of the copper bush circumferential cooling group. The water inlet pressure stabilizing cavity 21 and the water outlet pressure stabilizing cavity 22 are used for reducing the flow rate, stabilizing the pressure of inlet water and outlet water and ensuring that the internal pressures of the water inlet cavity and the water outlet cavity are approximately equal. The pore canal 23 is a slender hole, which can increase the pressure drop of the cooling water channel and indirectly ensure that the cooling water quantity of each circumferential groove is basically equal.

Furthermore, one water inlet pressure stabilizing cavity 21 and one water outlet pressure stabilizing cavity 22 connected with the water inlet pressure stabilizing cavity through the cooling groove group 31 form a cooling water inlet and outlet structure of a copper sleeve circumferential cooling group, and a plurality of cooling water inlet and outlet structures with the same specification are circumferentially arranged on the axis structure 2 at equal intervals.

Further, as shown in fig. 8-11, the water inlet pressure stabilizing cavity 21 and the water outlet pressure stabilizing cavity 22 both axially penetrate through the axial center structure 2, the cross section is rectangular or arc-angle rectangular, and the length direction of the rectangular or arc-angle rectangular is along the radial direction of the axial center structure 2, and the pressure stabilizing water inlet cavity and the pressure stabilizing water outlet cavity in the cooling water inlet and outlet structure are respectively arranged at intervals with the pressure stabilizing water outlet cavity and the pressure stabilizing water inlet cavity of the adjacent cooling water inlet and outlet structure; the section is a surface which is perpendicular to the axial direction of the main shaft 1 on the axis structure 2, and the arc-angle rectangle is a rectangle with four arc-shaped corners.

Furthermore, the turbulent flow structure comprises a turbulent flow groove 51 arranged on the axis structure 2 and a turbulent flow plate 52 inserted in the turbulent flow groove 51, wherein the turbulent flow groove 51 is used for inserting the turbulent flow plate 52, so that the flow velocity disturbance is realized, and the heat exchange coefficient is increased (the heat exchange capacity is increased); as shown in fig. 12, the bottom of the spoiler 52 is provided with spoiler holes 53 corresponding to the circumferential grooves 311 in the cooling groove group 31, that is, the number of spoiler holes 53 is the same as the number of circumferential grooves 311 in each cooling groove group 31, and after the spoiler 52 is inserted into the spoiler groove 51, the axial positions of the spoiler holes 53 on the axial structure 2 correspond to the circumferential grooves 311 in the cooling groove group 31 one by one, and after the spoiler 52 is inserted into the spoiler groove 51, the spoiler grooves 51 on both sides of the spoiler 52 form a water inlet spoiler cavity 54 and a water outlet spoiler cavity 55 which are respectively communicated with the circumferential grooves 311 in the cooling groove group 31, and the spoiler grooves are used in cooperation, and the flow velocity is disturbed by forced flow velocity steering, so as to achieve the purpose of increasing the cooling capacity (heat exchange coefficient). Cooling water flows in from the water inlet pressure stabilizing cavity, flows into the copper sleeve circumferential groove through the radial water hole channel 23, realizes flow velocity disturbance at the spoiler through flow velocity diversion, then enters the copper sleeve circumferential groove, and finally flows into the water outlet pressure stabilizing cavity through the radial water hole, namely, the hole channel.

Further, the number of the cooling groove groups 31 is 4-8, the wall thickness between adjacent cooling groove groups 31 is 4-8mm, the width of the circumferential groove 311 in each cooling groove group 31 is not less than 4mm, the depth is not less than 4mm, the axial wall thickness between adjacent circumferential grooves 311 is between 4-8mm, and the number of the circumferential grooves 311 is 12-22.

Furthermore, the axial center structure is further provided with a first sealing ring 6, a second sealing ring 7 and an end cover 8 at two axial ends.

Furthermore, the second sealing ring 7 is arranged at the joint of the copper sleeve 3 and the two sides of the end part of the axle center structure 2 to seal the copper sleeve 3 and the axle center structure 2, and perform secondary sealing on the contact surface of the copper sleeve 3 and the axle center structure 2, and in addition, a dynamic balance guide rail is used on the second sealing ring 7 to install a dynamic balance sliding block; the first sealing ring 6 is arranged between the main shaft 1 and the gland to seal the contact surface of the gland and the main shaft 1; the end cover 8 shown in fig. 13 is arranged at one end of the water inlet pressure stabilizing cavity 21 and the water outlet pressure stabilizing cavity 22, so that the pressure stabilizing cavities only have the function of water inlet or water outlet at one end, and the other end is sealed, for example, one end of the water inlet pressure stabilizing cavity 21 is plugged by arranging the concave ring 24 for installing the end cover 8, so that only one end of the water inlet pressure stabilizing cavity 21 is communicated with the water inlet end 11 of the main shaft 1, and the other end is sealed.

Further, as shown in fig. 15, the main shaft 1 is provided with radial pipes 13, the radial pipes 13 are communicated with the water inlet flow passage 411 or the water outlet flow passage 421, the pipe diameter is between 30 to 39mm, the pipes are uniformly distributed in the circumferential direction, and the number of the pipes is the same as that of the water inlet pressure stabilizing cavities 21 or the water outlet pressure stabilizing cavities 22. The inner flow passage of the main shaft 1 is divided into two parts: the water inlet side and the water outlet side, wherein the water inlet side transmits cooling water to the water inlet gland through the radial pipe 13; the outlet side collects the cooling water delivered by the outlet gland through the radial pipe 13.

The utility model discloses a roller surface cooling method of a circumferential groove nanocrystalline crystallizer cooling structure, which comprises the following steps: in the cooling structure of the nanocrystalline crystallizer with the circumferential groove, cooling water enters the crystallizer through the water inlet end of the main shaft, enters each water inlet pressure stabilizing cavity on the axis structure through the water inlet flow channel on the water inlet gland and is accumulated in the water inlet pressure stabilizing cavity, after the water inlet pressure stabilizing cavity is fully filled with the cooling water, the cooling water enters the circumferential groove of the cooling groove group arranged along the circumferential direction of the inner surface of the copper sleeve through a pore channel to cool the copper sleeve, when the cooling water flows through the circumferential groove of the cooling groove group, the flow speed disturbance is realized at the spoiler through the flow speed change, then the cooling water enters the circumferential groove of the copper sleeve, then the cooling water after heat exchange enters the water outlet pressure stabilizing cavity through the pore channel communicated with the water outlet pressure stabilizing cavity and is accumulated in the water outlet pressure stabilizing cavity, after the cooling water after heat exchange in the water outlet pressure stabilizing cavity is fully filled with the cooling water through the water outlet flow channel on the water outlet gland, the cooling water after heat exchange is led out from the water outlet end of the main shaft, and the cooling water circularly flows in the circumferential cooling group of the copper sleeve of the nanocrystalline crystallizer, so as to continuously cool the nanocrystalline crystallizer, and keep the uniformity of axial cooling power distribution in the cooling process.

In the cooling roller device in the embodiment, 4 cooling groove groups with the same specification are arranged, a cooling water turbulence structure is arranged in the middle of each cooling groove group, the inner part of the copper sleeve is circumferentially divided into 8 sections, 16 circumferential grooves are axially arranged in each cooling groove group, each circumferential groove is wide, deep, thick and thick, and 5, the axial wall thickness between adjacent circumferential grooves is 10mm, the width of a belt is 80mm through measurement of a spray belt of the crystallizer, the range difference is smaller than 1.5 mu m, and the lamination coefficient is lower than 89%.

It should be noted that the embodiments were chosen and described in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can better understand and utilize the present invention, and the protection scope of the present invention is not limited to the above embodiments, and many equivalent modifications and variations can be made according to the content of the present specification, and all of them belong to the protection scope of the present invention.

Claims (9)

1. The cooling structure of the peripheral groove nanocrystalline crystallizer is characterized in that: the spindle comprises a spindle, an axis structure and a copper sleeve, wherein the axis structure is sleeved on the spindle, and the copper sleeve is sleeved on the outer edge of the axis structure; one end of the main shaft is a hollow water inlet end, and the other end of the main shaft is a hollow water outlet end; the two sides of the axis structure are respectively provided with a water inlet gland with a water inlet flow passage and a water outlet gland with a water outlet flow passage; a water inlet pressure stabilizing cavity and a water outlet pressure stabilizing cavity are arranged on the axis structure in an annular manner at equal intervals; a plurality of cooling groove groups with the same specification are arranged on the copper sleeve at equal intervals along the circumferential direction of the inner surface of the copper sleeve, one end of each cooling groove group is communicated with the water inlet pressure stabilizing cavity, and the other end of each cooling groove group is communicated with the water outlet pressure stabilizing cavity; the middle part of each cooling groove group is provided with a cooling water turbulence structure; the water inlet end of the main shaft is communicated with a water inlet flow passage of the water inlet gland, the water outlet end of the main shaft is communicated with a water outlet flow passage, the water inlet pressure stabilizing cavity, the cooling groove group, the water outlet pressure stabilizing cavity and the water outlet flow passage form a complete circumferential copper sleeve cooling group, and a plurality of circumferential copper sleeve cooling groups are circumferentially adjacently arranged to form a circumferential groove nanocrystalline crystallizer cooling structure.

2. The peripheral groove nanocrystalline crystallizer cooling structure of claim 1, wherein: each cooling groove group consists of a plurality of circumferential grooves which are circumferentially arranged along the inner surface of the copper sleeve and have the same axial distance.

3. The peripheral groove nanocrystalline crystallizer cooling structure of claim 1 or 2, characterized in that: and one ends of the water inlet pressure stabilizing cavity and the water outlet pressure stabilizing cavity facing the cooling groove group are provided with a plurality of pore channels which are opposite to the circumferential grooves and have the same number, and the water inlet pressure stabilizing cavity, the pore channels, the circumferential grooves of the cooling groove group and the water outlet pressure stabilizing cavity are communicated to form a cooling realization structure of the copper sleeve circumferential cooling group.

4. The peripheral groove nanocrystalline crystallizer cooling structure of claim 3, wherein: the cooling water inlet and outlet structures of the copper jacket circumferential cooling group are formed by one water inlet pressure stabilizing cavity and one water outlet pressure stabilizing cavity connected with the water inlet pressure stabilizing cavity through the cooling groove group, and a plurality of cooling water inlet and outlet structures with the same specification are circumferentially arranged on the axis structure at equal intervals.

5. The peripheral groove nanocrystalline crystallizer cooling structure of claim 4, wherein: the water inlet pressure stabilizing cavity and the water outlet pressure stabilizing cavity are both axially communicated with the axis structure, the cross section is rectangular or arc-angle rectangular, the length direction of the rectangular or arc-angle rectangular shape is along the radial direction of the axis structure, and the pressure stabilizing water inlet cavity and the pressure stabilizing water outlet cavity in the cooling water inlet and outlet structure are respectively arranged at intervals with the pressure stabilizing water outlet cavity and the pressure stabilizing water inlet cavity of the adjacent cooling water inlet and outlet structure.

6. The peripheral groove nanocrystalline crystallizer cooling structure of claim 1 or 2, characterized in that: the number of the cooling groove groups is 4-8, the wall thickness between adjacent cooling groove groups is 4-8mm, the width of a circumferential groove in each cooling groove group is not less than 4mm, the depth of the circumferential groove in each cooling groove group is not less than 4mm, the axial wall thickness between adjacent circumferential grooves is 4-8mm, and the number of the circumferential grooves is 12-22.

7. The peripheral groove nanocrystalline crystallizer cooling structure of claim 1, wherein: the axial center structure is also provided with a sealing plate, a sealing ring and an end cover along the two axial ends.

8. The peripheral groove nanocrystalline crystallizer cooling structure of claim 7, wherein: the sealing rings are arranged at the joints of the copper sleeve and the two sides of the end part of the axle center structure to seal the copper sleeve and the axle center structure; the sealing plate is arranged between the main shaft and the gland and used for sealing the contact surface of the gland and the main shaft; the end covers are arranged at one ends of the water inlet pressure stabilizing cavity and the water outlet pressure stabilizing cavity, so that the pressure stabilizing cavity only has the function of water inlet or water outlet at one end, and the sealing of the other end is ensured.

9. The peripheral groove nanocrystalline crystallizer cooling structure of claim 1, wherein: the main shaft is provided with radial pipes, the pipe diameter is 30-39mm, the radial pipes are uniformly distributed in the circumferential direction, and the number of the radial pipes is the same as that of the water inlet pressure stabilizing cavities or the water outlet pressure stabilizing cavities.

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