Cooling continuous casting roller

Abstract

The utility model relates to a cooling continuous casting roller which comprises a roller body, a water containing cavity is formed in the center of the interior of the roller body, a water guide pipe is arranged in the water containing cavity, a mandrel is embedded in an inner hole of the roller body on one side of the water guide pipe, an inner water channel communicated with the water containing cavity is arranged in the roller body and the mandrel, and an inner cooling water pipe is arranged in the inner water channel in a penetrating mode. One end of the inner cold water pipe is connected with the double-channel rotary water feeder, a water plug is arranged in the inner water channel on one side of the mandrel to plug the inner water channel, a first spiral water groove is formed in the periphery of the water guide pipe, and a water passing opening is formed in one end of the water guide pipe to communicate with the first spiral water groove and an inner cavity of the water guide pipe. A second spiral water groove communicated with the first spiral water groove is formed in the periphery of the end, close to the water guide pipe, of the mandrel, a water guide hole is formed in the mandrel in the radial direction, and the water guide hole is communicated with the second spiral water groove. Heat conducted by a continuous casting slab can be effectively taken away in time, the cooling capacity is improved, the temperature reduction speed of the roller body can be controlled, and fatigue stress caused by too fast temperature reduction of the roller body when no continuous casting slab passes through is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous casting rollers, in particular to a cooling continuous casting roller. Background Art

[0002] The continuous casting roller is the core component of the continuous casting machine during the continuous casting production process. In the continuous casting billet production process, its main function is to bend, solidify and straighten the continuous casting billet in an arc shape, and pull it horizontally after the molten steel passes through the continuous casting crystallizer to form a billet shell. The performance, quality and service life of the continuous casting roller have a great impact on the working efficiency of the continuous casting machine. In the continuous casting billet production process, if the continuous casting roller is severely worn, severely cracked, the shaft is broken or other faults occur, it may cause the entire continuous casting production line to fail to produce smoothly or directly cause the continuous casting process to stop.

[0003] The existing continuous casting roller cooling structure is simple or does not achieve the ideal cooling effect. Since the roller surface is in linear contact with the continuous casting billet surface during the operation of the continuous casting roller, the circumferential and radial temperature distribution of the surface is uneven. When the cooling capacity is insufficient, the surface temperature of the continuous casting roller rises rapidly, which will exceed the working temperature limit of the material. At the same time, unevenly distributed thermal stress will be generated. The heat cannot be transferred to the inside of the roller in time, and the cooling water cannot effectively transfer the heat to the outside of the continuous casting roller in time. The surface temperature of the continuous casting roller continues to rise, exceeding its temperature resistance limit. After long-term use, the surface of the continuous casting roller gradually fails and eventually damages, resulting in a decrease in the service life of the continuous casting roller. The blind pursuit of cooling capacity also affects the service life of the continuous casting roller. If the cooling capacity is too strong, the surface temperature of the roller is limited when the roller contacts the billet and will not exceed the working temperature limit of the material. However, when the surface of the roller is not in contact with the billet, the temperature drop rate of the roller surface will accelerate, and the uneven thermal stress formed will increase, which will aggravate the generation of fatigue. The material will prematurely develop fatigue cracks, causing the surface of the continuous casting roller to fail and the service life to decrease. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a cooling continuous casting roller, which can meet the cooling requirements of the continuous casting roller surface and control the excessively fast temperature drop of the continuous casting roller surface, thereby extending the service life of the continuous casting roller.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A cooling continuous casting roller comprises a roller body, wherein a water containing cavity is provided at the center of the roller body, a water guide pipe is provided in the water containing cavity, a core shaft is embedded in the inner hole of the roller body on one side of the water guide pipe, an inner water channel connected with the water containing cavity is provided in the roller body and the core shaft, an inner cooling water pipe is penetrated in the inner water channel, one end of the inner cooling water pipe is connected with a double-channel rotary water feeder, a water plug is provided in the inner water channel on one side of the core shaft to block the inner water channel, a spiral water groove 1 is provided on the outer periphery of the water guide pipe, a water through port is provided at one end of the water guide pipe to connect the spiral water groove 1 with the inner cavity of the water guide pipe, a spiral water groove 2 connected with the spiral water groove 1 is provided on the outer periphery of the end of the core shaft close to the water guide pipe, a water guide hole is radially provided inside the core shaft, and the water guide hole is connected with the spiral water groove 2.

[0007] The length of the water chamber: L 水 =L-2DN / K

[0008] L: effective length of roller 1, unit: mm;

[0009] D: outer diameter of roller body 1; unit: mm;

[0010] K: The ratio of the outer diameter of the roller body 1 to the outer diameter of the mandrel, which is 1.8 to 2.0;

[0011] N: The ratio of the length of the inner hole of the roller 1 and the matching surface of the mandrel to the outer diameter of the mandrel, which is 1.3 to 1.5;

[0012] The diameter of the water-containing cavity is d 水 =0.95D / K.

[0013] The inner diameter of the water pipe is d 导 =0.75D / K.

[0014] The spiral water trough 1 and the spiral water trough 2 are both provided with a plurality of spiral water channels, and each spiral water channel of the core shaft is correspondingly connected to a water guide hole.

[0015] Water collection grooves are arranged on both sides of the spiral water groove of the water guide pipe.

[0016] A plurality of branch water pipes are evenly distributed on the circumference of the front end of the inner cooling water pipe.

[0017] Compared with the existing technology, the beneficial effects of the utility model are:

[0018] The utility model provides a cooling continuous casting roller with a spiral water channel and a water containing cavity. The appropriate distance between the spiral water channel and the roller surface and the setting of the water containing cavity can effectively take away the heat conducted by the continuous casting slab in time, improve the cooling capacity, and control the temperature drop speed of the roller body to avoid the roller body from cooling too fast when no continuous casting slab passes through and generating fatigue stress, thereby reducing the performance of the continuous casting roller and affecting the service life of the continuous casting roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 for Figure 1 Middle AA section view.

[0021] Figure 3 for Figure 1 Middle BB section view.

[0022] Figure 4 It is a schematic diagram of the structure of the roller body.

[0023] Figure 5 This is a schematic diagram of the structure of the water pipe.

[0024] Figure 6 It is a schematic diagram of the structure of the mandrel.

[0025] Figure 7 It is a schematic diagram of the structure of the internal cooling water pipe.

[0026] In the figure: roller body 1, water containing cavity 2, water guide pipe 3, core shaft 4, inner water channel 5, inner cooling water pipe 6, water plug 7, spiral water trough 1 8, spiral water trough 2 9, water outlet 10, water guide hole 11, dual-channel rotary water feeder 12, branch water pipe 13. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means more than two.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0029] like Figure 1-Figure 7 A cooling continuous casting roller comprises a roller body 1, wherein a water containing cavity 2 is arranged at the center of the roller body 1, a water guide pipe 3 is arranged in the water containing cavity 2, and a gap is arranged between the water guide pipe 3 and the inner surface of the water containing cavity 2, so as to facilitate installation and increase the contact area with cooling water;

[0030] A core shaft 4 is embedded in the inner hole of the roller body on one side of the water guide pipe 3, an inner water channel 5 connected to the water holding cavity 2 is provided in the roller body 1 and the core shaft 4, an inner cooling water pipe 6 is penetrated in the inner water channel 5, one end of the inner cooling water pipe 6 is connected to the double-channel rotary water feeder 12, a water plug 7 is provided in the inner water channel on one side of the core shaft 4 to seal the inner water channel 5, a spiral water groove 1 8 is provided on the outer periphery of the water guide pipe 3, a water opening 10 is provided at one end of the water guide pipe 3 to connect the spiral water groove 1 8 with the inner cavity of the water guide pipe 3, a spiral water groove 2 9 connected to the spiral water groove 1 8 is provided on the outer periphery of the end of the core shaft 4 near the water guide pipe 3, and a plurality of spiral water channels are provided on the spiral water groove 1 8 and the spiral water groove 2 9, and water accumulation grooves are provided on both sides of the spiral water groove 1 of the water guide pipe to smoothly connect the spiral water groove 1 8 and the spiral water groove 2 9.

[0031] A water guide hole 11 is radially arranged inside the core shaft 4 , and each spiral water channel of the core shaft 4 is correspondingly connected to the water guide hole 11 .

[0032] The water plug 7 is installed between the water guide hole 11 and the inner end surface of the core shaft 4. The outer surface of the water plug 7 is provided with an annular groove. The annular groove is not sealed. The annular groove itself has sealing ability.

[0033] The cooling water is injected from the water inlet of the rotary water feeder 12, enters the inner water channel 5 along the inner cooling water pipe 6, enters the spiral water trough 2 9 through the water guide hole 11, and then enters the spiral water trough 1 8 of the water guide pipe 3, enters the water chamber 2 through the water opening 10, and then flows out from the outlet of the rotary water feeder 12 through the inner water channel 5, forming an orderly circulation of cooling water. The cooling water fully flows in the spiral water trough 1 8, the spiral water trough 2 9 and the entire water chamber 2 to ensure efficient heat transfer. The water chamber 2 provides a cold water pool in the continuous casting roller to form scattered cooling on the roller surface. At the same time, the ratio K of the outer diameter of the roller body 1 to the outer diameter of the mandrel 4 is reasonably selected to prevent the fast-flowing cooling water from cooling the roller body too quickly, thereby reducing fatigue stress.

[0034] The length of the water chamber 2 is: L 水 =L-2DN / K

[0035] L: effective length of roller 1, unit: mm;

[0036] D: outer diameter of roller body 1; unit: mm;

[0037] K: The ratio of the outer diameter of the roller body 1 to the outer diameter of the mandrel 4 is 1.8 to 2.0;

[0038] N: The ratio of the length of the matching surface between the inner hole of the roller body 1 and the core shaft 4 to the outer diameter of the core shaft 4 is 1.3 to 1.5.

[0039] The diameter of the water-containing chamber 2 is d 水 =0.95D / K.

[0040] The inner diameter of the water pipe 3 is d导 =0.75D / K.

[0041] A plurality of branch water pipes 13 are evenly distributed around the front circumference of the inner cooling water pipe 6 .

[0042] In order to make the purpose, technical scheme and technical effect of the utility model clearer, the technical scheme in the embodiment of the utility model is now described clearly and completely. However, the embodiment described below is only a part of the embodiment of the utility model, not all of the embodiments. In combination with the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] Example 1

[0044] A cooling continuous casting roller comprises a roller body 1, wherein a water containing cavity 2 is arranged at the center of the roller body 1, a water guide pipe 3 is arranged in the water containing cavity 2, a gap is arranged between the water guide pipe 3 and the inner surface of the water containing cavity 2, so as to facilitate installation and increase the contact area with cooling water; a core shaft 4 is embedded in the inner hole of the roller body on one side of the water guide pipe 3.

[0045] Roller 1 effective length L = 594 mm;

[0046] Roller body 1 outer diameter D: ф300mm;

[0047] The ratio K of the outer diameter of the roller body 1 to the outer diameter of the mandrel 4 is 1.899; that is, the outer diameter of the mandrel 4 d = D / K ≈ 158 mm;

[0048] The ratio N of the length of the matching surface between the inner hole of the roller body 1 and the core shaft 4 to the outer diameter of the core shaft 4 is 1.393;

[0049] The length L of the water chamber 2 水 =L-2DN / K=594-2×300×1.393 / 1.899≈154mm;

[0050] The diameter of the water chamber 2 is d 水 =0.95D / K=0.95×300 / 1.899≈150mm;

[0051] The inner diameter of the water pipe 3 is d 导 =0.75D / K=0.75×300 / 1.899≈118mm;

[0052] An inner water channel 5 connected with the water holding cavity 2 is provided in the roller body 1 and the core shaft 4, an inner cooling water pipe 6 is penetrated in the inner water channel 5, one end of the inner cooling water pipe 6 is connected with a dual-channel rotary water feeder 12, a water plug 7 is provided in the inner water channel on one side of the core shaft 4 to seal the inner water channel 5, a spiral water groove 1 8 is provided on the outer periphery of the water pipe 3, a water opening 10 is provided at one end of the water pipe 3 to connect the spiral water groove 1 8 with the inner cavity of the water pipe 3, a spiral water groove 2 9 connected with the spiral water groove 1 8 is provided on the outer periphery of the end of the core shaft 4 near the water pipe 3, and a plurality of spiral water channels are provided on the spiral water groove 1 8 and the spiral water groove 2 9, and water accumulation grooves are provided on both sides of the spiral water groove 1 of the water pipe so that the spiral water groove 1 8 and the spiral water groove 2 9 are smoothly connected.

[0053] A water guide hole 11 is radially arranged inside the core shaft 4 , and each spiral water channel of the core shaft 4 is correspondingly connected to the water guide hole 11 .

[0054] The water plug 7 is installed between the water guide hole 11 and the inner end surface of the core shaft 4, and an annular groove is provided on the outer surface of the water plug 7.

[0055] Example 2

[0056] A cooling continuous casting roller comprises a roller body 1, wherein a water containing cavity 2 is arranged at the center of the roller body 1, a water guide pipe 3 is arranged in the water containing cavity 2, a gap is arranged between the water guide pipe 3 and the inner surface of the water containing cavity 2, so as to facilitate installation and increase the contact area with cooling water; a core shaft 4 is embedded in the inner hole of the roller body on one side of the water guide pipe 3.

[0057] Roller 1 effective length L = 799 mm;

[0058] Roller body 1 outer diameter D: ф230mm;

[0059] The ratio K of the outer diameter of the roller body 1 to the outer diameter of the mandrel 4 is 1.949; that is, the outer diameter of the mandrel 4 d = D / K ≈ 118 mm;

[0060] The ratio N of the length of the matching surface between the inner hole of the roller body 1 and the core shaft 4 to the outer diameter of the core shaft 4 is 1.5;

[0061] The length L of the water chamber 2 水 =L-2DN / K=799-2×230×1.5 / 1.949≈445mm;

[0062] The diameter of the water chamber 2 is d 水 =0.95D / K=0.95×230 / 1.949≈112mm;

[0063] The inner diameter of the water pipe 3 is d 导 =0.75D / K=0.75×230 / 1.949≈88mm;

[0064] An inner water channel 5 communicating with the water chamber 2 is provided in the roller body 1 and the core shaft 4. An inner cooling water pipe 6 is provided through the inner water channel 5. One end of the inner cooling water pipe 6 is connected to a dual-channel rotary water feeder 12. Three branch water pipes 13 are evenly distributed around the front end of the inner cooling water pipe 6. A water plug 7 is provided in the inner water channel on one side of the core shaft 4 to block the inner water channel 5. A spiral water groove 1 8 is provided on the outer periphery of the water pipe 3. A water opening 10 is provided at one end of the water pipe 3 to connect the spiral water groove 1 8 with the inner cavity of the water pipe 3. A spiral water groove 2 9 communicating with the spiral water groove 1 8 is provided on the outer periphery of the end of the core shaft 4 near the water pipe 3. Both the spiral water groove 1 8 and the spiral water groove 2 9 are provided with a plurality of spiral water channels. Both sides of the spiral water groove 1 of the water pipe are provided with water accumulation grooves so that the spiral water groove 1 8 and the spiral water groove 2 9 are smoothly connected.

[0065] A water guide hole 11 is radially arranged inside the core shaft 4 , and each spiral water channel of the core shaft 4 is correspondingly connected to the water guide hole 11 .

[0066] The water plug 7 is installed between the water guide hole 11 and the inner end surface of the core shaft 4, and an annular groove is provided on the outer surface of the water plug 7.

[0067] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and basic spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cooling continuous casting roll, characterized in that: It includes a roller body, a water containing cavity is provided at the center of the roller body, a water conduit is provided in the water containing cavity, a core shaft is embedded in the inner hole of the roller body on one side of the water conduit, an inner water channel connected with the water containing cavity is provided in the roller body and the core shaft, an inner cooling water pipe is penetrated in the inner water channel, one end of the inner cooling water pipe is connected with a double-channel rotary water feeder, a water plug is provided in the inner water channel on one side of the core shaft to seal the inner water channel, a spiral water groove 1 is provided on the outer periphery of the water conduit, a water opening is provided at one end of the water conduit to connect the spiral water groove 1 with the inner cavity of the water conduit, a spiral water groove 2 connected with the spiral water groove 1 is provided on the outer periphery of the end of the core shaft close to the water conduit, a water conduit hole is radially provided inside the core shaft, and the water conduit hole is connected with the spiral water groove 2.

2. A cooling continuous casting roller according to claim 1, characterized in that: The length of the water-containing chamber is: L 水 =L-2DN / K L: effective length of roller, unit: mm; D: outer diameter of roller; unit: mm; K: The ratio of the outer diameter of the roller to the outer diameter of the mandrel, which is 1.8 to 2.0; N: The ratio of the length of the roller inner hole and the mandrel matching surface to the mandrel outer diameter is 1.3 to 1.

5.

3. A cooling continuous casting roller according to claim 1, characterized in that: The diameter of the water-containing cavity is: is 水 =0.95D / K。 4. A cooling continuous casting roller according to claim 1, characterized in that: The inner diameter of the water pipe is: <h2 style=";text-align:left;direction:ltr">d<h2 style=";text-align:left;direction:ltr"> 导 <h2 style=";text-align:left;direction:ltr"> <0.75D / K.

5. A cooling continuous casting roller according to claim 1, characterized in that: The spiral water trough 1 and the spiral water trough 2 are both provided with a plurality of spiral water channels, and each spiral water channel of the core shaft is correspondingly connected to a water guide hole.

6. A cooling continuous casting roller according to claim 1, characterized in that: Water collection grooves are arranged on both sides of the spiral water groove of the water guide pipe.

7. A cooling continuous casting roller according to claim 1, characterized in that: A plurality of branch water pipes are evenly distributed on the circumference of the front end of the inner cooling water pipe.

Images