Back-up roll and roll table with internal cooling function

Abstract

The utility model discloses a back-up roll with an internal cooling function and a roll way, which belong to the technical field of metal processing auxiliary equipment, and in order to improve the cooling capacity of a cutting roll way, the back-up roll with the internal cooling function comprises a first flange (1), a middle pipe (2), an outer pipe (3), an inner core (5) and a second flange (6), the inner core (5), the middle pipe (2) and the outer pipe (3) are sequentially sleeved from inside to outside, a cooling water inner cavity (201) is formed between the inner core (5) and the middle pipe (2), a cooling water outer cavity (301) is formed between the middle pipe (2) and the outer pipe (3), and the cooling water inner cavity (201) is communicated with the cooling water outer cavity (301). The supporting roller with the internal cooling function can keep good rigidity in the secondary cutting process of extra-thick, wide and high-temperature plate blanks, and therefore efficient production of high-quality medium-thickness plates is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal processing auxiliary equipment technical field, specifically is a kind of supporting roller with internal cooling function, and a kind of roller bed. BACKGROUND

[0002] Medium plate as important industrial material, is widely used in architecture, shipbuilding, mechanical manufacturing and other fields. Its efficiency and quality in production process directly affect the performance and cost of terminal product. As one of the key processes in modern steel production, continuous casting technology can effectively improve the production efficiency of steel plate and reduce resource waste through continuous casting. However, in the continuous casting process, since the slab cutting speed is less than the continuous casting speed, it becomes an important factor limiting the production speed, so the continuous casting process often produces multiple-length billets of target slab length, and then cuts twice to obtain target-length slabs for subsequent processing.

[0003] In the secondary cutting process, the roller bed is stationary, and the continuous casting multiple-length billet is parked on the cutting roller bed and cut by a flame cutting machine. However, due to the high temperature of the continuous casting multiple-length billet, a large amount of heat energy is transferred to the cutting roller bed. The cooling capacity of the cooling water in the traditional cutting roller bed structure is insufficient, the temperature of the roller bed contact surface continuously rises, and softening easily occurs at the contact position, thereby reducing the supporting performance. In severe cases, the slab bends due to the loss of support, reduces the cutting precision, and affects the production quality. SUMMARY

[0004] To improve the cooling capacity of the cutting roller bed itself, the utility model provides a supporting roller with internal cooling function and a roller bed. The supporting roller with internal cooling function can maintain good rigidity during the secondary cutting process of thick, wide and high-temperature slabs, thereby realizing efficient production of high-quality medium plates.

[0005] The technical solution adopted by the utility model embodiment to solve the technical problems is as follows:

[0006] A supporting roller with internal cooling function includes a first flange, an intermediate pipe, an outer pipe, an inner core and a second flange. The inner core, the intermediate pipe and the outer pipe are sequentially sleeved from inside to outside. The first flange is arranged at one end of the outer pipe, and the second flange is arranged at the other end of the outer pipe. The inner core and the intermediate pipe form a cooling water inner cavity, the intermediate pipe and the outer pipe form a cooling water outer cavity, and the cooling water inner cavity and the cooling water outer cavity are communicated.

[0007] The inner core is in a tubular structure, one end of the inner core is in a closed state, the other end of the inner core is in an open state, the other end of the inner core is connected and fixed with the second flange, and the inner cavity of the inner core is not communicated with the cooling water inner cavity.

[0008] The first protruding part is in a cylindrical structure, and the other end of the inner core is sleeved outside the first protruding part and is in sealed connection with the first protruding part.

[0009] The other end of the intermediate pipe is in open state and is connected and fixed with the second flange.

[0010] The closed end of the intermediate pipe is connected with an inlet pipe, the inner passage of the inlet pipe is in communication with the cooling water inner cavity, the first flange contains an axial through passage, the inlet pipe is sleeved in the axial through passage, and an annular outer passage is formed between the pipe wall of the inlet pipe and the side wall of the first flange, and the annular outer passage is in communication with the cooling water outer cavity.

[0011] The cooling water can enter the cooling water inner cavity through the inlet pipe, the cooling water in the cooling water inner cavity can enter the cooling water outer cavity, and the cooling water in the cooling water outer cavity can be discharged through the annular outer passage.

[0012] The other end of the intermediate pipe is sleeved in the second protruding part, the other end of the intermediate pipe is provided with a plurality of communication holes on the pipe wall, the cooling water inner cavity and the cooling water outer cavity are communicated through the communication holes, and the total area of the communication holes is 1.2-1.5 times of the axial sectional area of the cooling water inner cavity.

[0013] The outer circumferential surface of the intermediate pipe is provided with a plurality of spiral blades, the plurality of spiral blades are arranged at intervals along the circumference of the intermediate pipe, and a gap exists between the spiral blades and the inner circumferential surface of the outer pipe.

[0014] The supporting roller with the internal cooling function further comprises a plurality of supporting rings, the supporting rings are sleeved outside the outer pipe, the outer diameter of the supporting rings is greater than the outer diameter of the outer pipe, and the plurality of supporting rings are arranged at intervals along the axis of the outer pipe.

[0015] A roller table comprises the supporting roller with the internal cooling function.

[0016] The embodiment of the utility model has the advantages of:

[0017] 1. The rotating blade structure is used for guiding flow in the return water tank, can fully utilize the cooling water for heat exchange, improves the heat exchange capacity, in addition, the rotating blade structure is also beneficial to the temperature uniformity of the cooling roller body in the axial direction, avoids the abrasion and fatigue caused by temperature concentration, and improves the service life.

[0018] 2. The thick-walled steel pipe is used as the outer pipe main body structure, compared with the prior art, the cooling water is closer to the contact surface of the continuously-cast billet, the heat conduction thermal resistance is smaller, and the cooling capacity of the cooling roller body is improved; meanwhile, the temperature of the outer pipe is lower, has sufficient rigidity to support the continuously-cast billet, can save the core steel material, and reduces the production cost.

[0019] 3. The inner core is used as filling inside the roller body, which reduces the cross-sectional area of the cooling water channel to a certain extent, increases the cooling water flow rate, avoids the emergence of flow field dead zones, and reduces the overall weight of the equipment, reduces the rotational inertia, improves the control ability of the roller body rotation, and is beneficial to realize the precise control of the cutting position.

[0020] 4. The installation is carried out in a component assembly manner, which is beneficial to the later maintenance and replacement of the vulnerable parts, and the use cost and maintenance cost are low. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings accompanying the specification provide further understanding of the present application, the illustrative embodiments of the present application and the explanations thereof serve to explain the present application, and do not constitute an improper limitation on the present application.

[0022] Figure 1 is a front view of the support roller with internal cooling function.

[0023] Figure 2 is a sectional view of the support roller with internal cooling function.

[0024] Figure 3 is a schematic view of the intermediate pipe.

[0025] Figure 4 is a schematic view of the second flange.

[0026] Figure 5 is a schematic view of the rotary joint.

[0027] The following is an explanation of the reference signs:

[0028] 1. First flange; 2. Intermediate pipe; 3. Outer pipe; 4. Support ring; 5. Inner core; 6. Second flange; 7. Rotary joint;

[0029] 101. Axial through channel; 102. Annular outer channel;

[0030] 201. Cooling water inner cavity; 202. Inlet pipe; 203. Communication hole; 204. Spiral blade;

[0031] 301. Cooling water outer cavity;

[0032] 601. First protruding part; 602. Second protruding part;

[0033] 701. Inner interface; 702. Outer interface. DETAILED DESCRIPTION

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] For ease of understanding and description, the following description of this utility model uses absolute positional relationships. Unless otherwise specified, the directional word "above" indicates... Figure 2 The direction above, the directional word "down" indicates Figure 2 The lower side of the middle, "left" indicates Figure 2 The left side of the direction, the directional word "right" indicates Figure 2 The right-hand direction in the middle, "front" means perpendicular to Figure 2 The direction of the paper and the direction pointing inwards; the directional word "back" indicates perpendicular to. Figure 2 The orientation of the paper is pointed outwards from the viewpoint of the reader or user. This invention is described from the perspective of the reader or user, but the aforementioned directional terms should not be construed as limiting the scope of protection of this invention. Regarding the dimensions, angles, and parameters of the components, those skilled in the art can determine or replace them according to actual needs or a limited number of experiments.

[0036] like Figure 1 and Figure 2 As shown in the embodiment of this utility model, a support roller with internal cooling function includes a first flange 1, an intermediate tube 2, an outer tube 3, an inner core 5, and a second flange 6. The inner core 5, the intermediate tube 2, and the outer tube 3 are sequentially arranged from the inside to the outside. The outer tube 3 extends in the left-right direction. The first flange 1 is located at the left end of the outer tube 3, and the second flange 6 is located at the right end of the outer tube 3. A cooling water inner cavity 201 is formed between the inner core 5 and the intermediate tube 2, and a cooling water outer cavity 301 is formed between the intermediate tube 2 and the outer tube 3. The cooling water inner cavity 201 and the cooling water outer cavity 301 are connected.

[0037] The axes of the first flange 1, the intermediate pipe 2, the outer pipe 3, the inner core 5, and the second flange 6 all coincide. The inner core 5 is a tubular structure. The left end of the inner core 5 is closed, and the right end of the inner core 5 is open. The right end (open end) of the inner core 5 is connected and fixed to the second flange 6. The internal cavity of the inner core 5 is isolated from and does not communicate with the cooling water cavity 201.

[0038] like Figure 2 and Figure 4 As shown, the second flange 6 has a columnar structure. A first protrusion 601 is provided at the left end of the second flange 6. The first protrusion 601 is cylindrical, and its axis coincides with the axis of the inner core 5. The right end of the inner core 5 is fitted over the first protrusion 601, and the inner core 5 and the first protrusion 601 are sealed together. The inner core 5 and the first protrusion 601 can be fixed using a pin.

[0039] like Figures 1 to 3 As shown, the left end of the intermediate pipe 2 is in a closed state, and the right end of the intermediate pipe 2 is in an open state. The right end (open end) of the intermediate pipe 2 is connected and fixed to the second flange 6.

[0040] An inlet pipe 202 is externally connected (welded) to the left end (closed end) of the intermediate pipe 2. The axis of the inlet pipe 202 coincides with the axis of the intermediate pipe 2. The inlet pipe 202 is used to connect to the water inlet end of the rotary joint. The internal channel of the inlet pipe 202 is connected to the cooling water inner cavity 201. The first flange 1 is a cylindrical structure. The first flange 1 contains an axial through channel 101. The inlet pipe 202 is sleeved in the axial through channel 101. An annular outer channel 102 is formed between the pipe wall of the inlet pipe 202 and the side wall of the first flange 1. The annular outer channel 102 is connected to the cooling water outer cavity 301.

[0041] like Figure 1 and Figure 2 As shown, the cooling water outside the support roller with internal cooling function can enter the cooling water inner cavity 201 through the internal channel of the inlet pipe 202, the cooling water in the cooling water inner cavity 201 can enter the cooling water outer cavity 301, and the cooling water in the cooling water outer cavity 301 can be discharged from the support roller with internal cooling function through the annular outer channel 102.

[0042] like Figure 2 and Figure 4 As shown, a second protrusion 602 is provided at one end of the second flange 6. The second protrusion 602 has a circular structure. The axis of the second protrusion 602 coincides with the axis of the intermediate tube 2. The second protrusion 602 is sleeved outside the first protrusion 601. The axis of the second protrusion 602 coincides with the axis of the first protrusion 601. The right end of the intermediate tube 2 is sleeved inside the second protrusion 602. The right end of the intermediate tube 2 and the second protrusion 602 can be fixed by a pin. Multiple connecting holes 203 are provided on the tube wall of the right end of the intermediate tube 2. The connecting holes 203 are used for cooling water to pass through. The cooling water inner cavity 201 and the cooling water outer cavity 301 are connected through the connecting holes 203.

[0043] like Figure 2 As shown, multiple connecting holes 203 are evenly spaced along the circumference of the intermediate pipe 2. The total area of ​​the connecting holes 203 is not less than the axial cross-sectional area of ​​the cooling water inner cavity 201. Preferably, the total area of ​​the connecting holes 203 is 1.2 to 1.5 times the axial cross-sectional area of ​​the cooling water inner cavity 201. That is, the area of ​​a single connecting hole 203 multiplied by the total number of connecting holes 203 is 1.2 to 1.5 times the axial cross-sectional area of ​​the cooling water inner cavity 201. The axial cross-section of the cooling water inner cavity 201 is a cross-section perpendicular to the axis of the cooling water inner cavity 201.

[0044] like Figure 2 and Figure 3As shown, the outer circumferential surface of the intermediate pipe 2 is provided with a plurality of spiral vanes 204 for guiding the cooling water in the circumferential direction along the axial direction, and the plurality of spiral vanes 204 are arranged at intervals along the circumferential direction of the intermediate pipe 2. In order to ensure the uniformity of the axial cooling capacity of the cooling roller body, the rotation angle of a single spiral vane 204 along the circumferential direction of the intermediate pipe 2 is 360°.

[0045] As shown in the drawings, Figure 3 The number of spiral vanes 204 on the outer circumferential surface of the intermediate pipe 2 is 3-8, and preferably 6. There is a gap between the spiral vanes 204 and the inner circumferential surface of the outer pipe 3.

[0046] The outer pipe 3 is a thick-walled seamless steel pipe. The connection between the first flange 1 and the outer pipe 3 can be bolted or welded. Considering the later maintenance and the requirement of the roller body coaxiality, bolted connection is preferred. The connection between the second flange 6 and the outer pipe 3 can be bolted or welded. Considering the transmission characteristics, welded connection is preferred, and further processing is required after welding to ensure the coaxiality.

[0047] As shown in the drawings, Figure 1 The support ring 4 is sleeved outside the outer pipe 3, the axis of the support ring 4 coincides with the axis of the outer pipe 3, the outer diameter of the support ring 4 is larger than the outer diameter of the outer pipe 3, a plurality of support rings 4 are uniformly arranged at intervals along the axial direction of the outer pipe 3, and the support ring 4 is used to directly support the continuous casting billet.

[0048] The outer pipe 3 and the support ring 4 can be fixed by welding or shaft stop. Considering the replaceability, the fixing method can be shaft stop, for example, a snap ring can be used. The outer wall of the outer pipe 3 is in transition fit with the support ring 4, and the gap is filled with high-temperature silicone grease to improve the heat exchange capacity.

[0049] A roller bed contains a plurality of support rollers, which are the above-mentioned support rollers with internal cooling function. The left end of the first flange 1 of the support roller is sealingly connected with a rotary joint 7, which is used for the inlet and outlet of the cooling water in the cooling roller body. The rotary joint 7 contains an inner interface 701 and an outer interface 702. The inner interface 701 is sealingly connected with the inlet pipe 202, and the outer interface 702 is in communication with the annular outer channel 102, as shown in the drawings. Figure 2 and Figure 5 The outer side of the first flange 1 is assembled with the first bearing, and the second flange 6 is used to drive the rotation of the support roller with internal cooling function.

[0050] The working process of the support roller with internal cooling function is introduced as follows.

[0051] The driving device drives the support roller with internal cooling function to rotate around the axis of the outer tube 3 through the second flange 6, the cooling water outside the support roller with internal cooling function enters the cooling water inner cavity 201 through the internal passage of the lead-in pipe 202, the cooling water in the cooling water inner cavity 201 enters the cooling water outer cavity 301 through the communication hole 203, the cooling water in the cooling water outer cavity 301 exchanges heat with the outer tube 3, and the cooling water in the cooling water outer cavity 301 is discharged from the support roller with internal cooling function through the annular outer passage 102, so that the cooling of the roller body is completed.

[0052] The support roller with internal cooling function has the advantages that:

[0053] 1. The inner tube adopts a rotating blade, so that the cooling capacity of the cooling water is fully utilized, and the temperature uniformity of the roller body in the axial direction is improved.

[0054] 2. The thick-walled steel tube is used as the outer tube main structure, compared with the existing structure, the wall thickness is smaller, the cooling capacity is stronger, the temperature is lower, the strength is higher, the required steel material is less, and the cost is reduced.

[0055] 3. The inner core is used as an internal structure, the mass is smaller, the weight of the roller body is smaller, the rotational inertia is smaller, and the control is easier to realize.

[0056] 4. The structure is assembled by using an assembly mode, compared with the existing structure, the part processing is simpler, the vulnerable parts are easier to replace, and the equipment disassembly and assembly are easier.

[0057] The above is only a specific embodiment of the utility model, and cannot limit the range of the utility model implementation, so the replacement of equivalent components or equivalent changes and modifications made in the protection range of the utility model should still belong to the scope covered by the utility model. In addition, the technical features in the utility model can be freely combined with each other, and the technical features can be freely combined with each other, and the technical features can be freely combined with each other.

Claims

1. A support roller having an internal cooling function, characterized by, The support roller with internal cooling function comprises a first flange (1), a middle pipe (2), an outer pipe (3), an inner core (5) and a second flange (6), the inner core (5), the middle pipe (2) and the outer pipe (3) are sequentially sleeved from inside to outside, the first flange (1) is arranged at one end of the outer pipe (3), the second flange (6) is arranged at the other end of the outer pipe (3), a cooling water inner cavity (201) is formed between the inner core (5) and the middle pipe (2), a cooling water outer cavity (301) is formed between the middle pipe (2) and the outer pipe (3), and the cooling water inner cavity (201) and the cooling water outer cavity (301) are communicated.

2. The support roller having an internal cooling function according to claim 1, characterized by, The inner core (5) is in a tubular structure, one end of the inner core (5) is in a closed state, the other end of the inner core (5) is in an open state, the other end of the inner core (5) is connected and fixed with the second flange (6), and the inner cavity of the inner core (5) is not communicated with the cooling water inner cavity (201).

3. The support roller having an internal cooling function according to claim 2, characterized by, One end of the second flange (6) is provided with a first protruding part (601), the first protruding part (601) is in a cylindrical structure, the other end of the inner core (5) is sleeved outside the first protruding part (601), and the inner core (5) is sealingly connected with the first protruding part (601).

4. The support roller having an internal cooling function according to claim 1, characterized by, One end of the middle pipe (2) is in a closed state, the other end of the middle pipe (2) is in an open state, and the other end of the middle pipe (2) is connected and fixed with the second flange (6).

5. The support roller having an internal cooling function according to claim 4, characterized by, The closed end of the middle pipe (2) is connected with a lead-in pipe (202), the inner passage of the lead-in pipe (202) is communicated with the cooling water inner cavity (201), the first flange (1) contains an axial through passage (101), the lead-in pipe (202) is sleeved in the axial through passage (101), an annular outer passage (102) is formed between the pipe wall of the lead-in pipe (202) and the side wall of the first flange (1), and the annular outer passage (102) is communicated with the cooling water outer cavity (301).

6. The support roller having an internal cooling function according to claim 4, wherein Cooling water can enter the cooling water inner cavity (201) through the lead-in pipe (202), the cooling water in the cooling water inner cavity (201) can enter the cooling water outer cavity (301), and the cooling water in the cooling water outer cavity (301) can be discharged through the annular outer passage (102).

7. The support roller having an internal cooling function according to claim 4, characterized by, One end of the second flange (6) is provided with a second protruding part (602), the second protruding part (602) is in a circular ring structure, the other end of the middle pipe (2) is sleeved in the second protruding part (602), a plurality of communication holes (203) are arranged on the pipe wall of the other end of the middle pipe (2), the cooling water inner cavity (201) and the cooling water outer cavity (301) are communicated through the communication holes (203), and the total area of the communication holes (203) is 1.2-1.5 times of the axial sectional area of the cooling water inner cavity (201).

8. The support roller having an internal cooling function according to claim 4, characterized by, The outer circumferential surface of the middle pipe (2) is provided with a plurality of spiral blades (204), the plurality of spiral blades (204) are arranged at intervals along the circumferential direction of the middle pipe (2), and there is a gap between the spiral blades (204) and the inner circumferential surface of the outer pipe (3).

9. The support roller having an internal cooling function according to claim 1, characterized by, The support roller with internal cooling function further comprises a support ring (4), the support ring (4) is sleeved outside the outer pipe (3), the outer diameter of the support ring (4) is greater than the outer diameter of the outer pipe (3), and a plurality of support rings (4) are arranged at intervals along the axial direction of the outer pipe (3).

10. A roller bed characterized by, The roller bed comprises the support roller with the internal cooling function according to claim 1.

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