A new heat-resistant pad

Abstract

The utility model discloses a novel heat -resistant cushion block belongs to heat -resistant cushion block technical field, be applied to water -cooled roof beam, and heat -resistant cushion block main part sets up on water -cooled roof beam, heat -resistant cushion block main part includes by upper to lower in proper order set's upper cushion block, middle cushion block and lower cushion block, the upper cushion block side end is equipped with the signboard recess, and the bottom end of lower cushion block is inlayed with first recess and sets up second clamping slot on the both sides of first recess, through first recess, second clamping slot reduces the heat conduction of heat -resistant cushion block main part center area, the utility model discloses recess inlayed in the bottom end of cushion block can reduce the heat conduction of heat -resistant cushion block center area, makes heat -resistant cushion block work surface temperature tend to be consistent, thereby improves the temperature uniformity of the steel billet of being heated, reduces weight simultaneously, reduces the use cost of heat -resistant cushion block.

Description

Technical Field

[0001] This utility model belongs to the technical field of heat-resistant pads, and specifically relates to a new type of heat-resistant pad. Background Technology

[0002] Heat-resistant pads are used in steel rolling furnaces, fixed to the furnace bottom support beams. They support and transport steel billets under long-term conditions of ultra-high temperature, oxidizing / sulfiding atmosphere, and heavy load, making them a key component of the furnace; their performance directly affects the heating quality of the steel billets. Heat-resistant pads are mainly made of cobalt-based and nickel-based alloys, which are difficult to process, therefore they are primarily cast.

[0003] In the existing technology, the upper part of the heat-resistant pad is set as a flat cube. There are two main structures: one is solid. After the heat-resistant pad is cooled by the support beam, the temperature of the upper surface is uneven, with the middle being low and the periphery being high. This causes the high-temperature strength of the periphery of the pad to decrease, and it is worn first. This causes the middle to protrude, which not only affects the surface quality of the heated steel billet, but also further reduces the life of the heat-resistant pad.

[0004] Another structure is Figure 1-2 The channel shown in the prior art already has a pad with a groove at the bottom (to reduce heat conduction in the central area of ​​the heat-resistant pad), but it is an open structure. Firstly, this affects the structural strength of the heat-resistant pad and reduces its service life; secondly, it is easily deformed during the manufacturing process, and the bottom arc dimension R cannot be guaranteed, affecting the contact rate with the water-cooling pipe, which in turn affects the heat exchange efficiency. This is because the water-cooling pipe supports the weight of the steel billet of 30 tons or more, and its main function is to conduct heat from the heat-resistant pad in a timely manner, thereby protecting the heat-resistant pad from being crushed. The long-term operating temperature of cobalt-based alloys in air is 1100℃, while the heating temperature of the steel billet is around 1250℃. Only water cooling can prevent the pad from overheating.

[0005] Therefore, while existing heat-resistant pads improve the temperature uniformity of the working surface and enhance the heating quality of steel billets, they also compromise the structural strength of the pads themselves. During prolonged use, the upper surface of the heat-resistant pads is prone to wear around the edges and develops bulges in the center, further impacting the heating quality of the steel billets. This results in significant wear and tear on the heat-resistant pads, increasing costs. Utility Model Content

[0006] In response to the problems mentioned in the background art, this utility model proposes a new type of heat-resistant pad. The lower end of the heat-resistant pad is improved, which ensures the temperature uniformity of the upper surface of the heat-resistant pad while the structural strength is basically unaffected. This improves the temperature uniformity of the heated steel billet, reduces weight, and lowers the cost of using the heat-resistant pad.

[0007] Technical solution: To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A novel heat-resistant pad is applied to a water-cooled beam. The heat-resistant pad body is set on the water-cooled beam and includes an upper pad, a middle pad, and a lower pad arranged sequentially from top to bottom. The upper pad has a lettering groove on its side end, and the bottom end of the lower pad has a first groove and a second slot on both sides of the first groove. The first groove and the second slot reduce heat conduction in the central area of ​​the heat-resistant pad body.

[0009] Preferably, the radius of the water-cooled beam is 70 mm.

[0010] Preferably, the upper pad, middle pad, and lower pad are all cubes with rounded corners, and the radius of the rounded corners is 3mm.

[0011] Preferably, the side ends of the central pad are in the shape of an isosceles trapezoid.

[0012] Preferably, the side of the first groove is a rounded trapezoid with a radius of 3mm, and is located at the center of the bottom of the lower pad.

[0013] Preferably, the second slot is located at the intersection of the bottom surface of the lower pad and the adjacent side surface, and the side surface of the second slot is a rounded trapezoid with a radius of 3mm.

[0014] Preferably, the distance between the first groove and the second slot is 5.5 mm.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0016] (1) This utility model improves the structure of the existing heat-resistant pad, specifically by improving the lower end of the heat-resistant pad, thereby improving the temperature uniformity of the working surface of the heat-resistant pad and improving the heating quality of the steel billet. While ensuring the temperature uniformity of the upper surface of the heat-resistant pad, the structural strength is basically unaffected. At the same time, by setting a groove at the bottom of the heat-resistant pad, the heat conduction in the central area of ​​the pad can be reduced, making the temperature of the working surface (upper surface) of the pad more uniform, thereby improving the temperature uniformity of the heated steel billet, while reducing the weight and lowering the cost of using the heat-resistant pad.

[0017] (2) The novel heat-resistant pad of this utility model adopts a three-level layered structure design. The composite pressure-bearing system is formed by the planar bearing of the upper pad, the trapezoidal transition of the middle pad, and the slot locking of the lower pad. When the high-temperature steel billet is placed on the surface of the upper pad, the pressure is evenly transmitted to the isosceles trapezoidal structure of the middle pad through the planar contact surface of the upper pad. Its inclined surface design disperses and transmits the pressure, effectively avoiding stress concentration on the traditional vertical wall.

[0018] (3) The lower pad in this utility model forms a multi-directional interlocking connection with the water-cooled beam through the first groove and the second slot. The trapezoidal slot structure can generate directional deformation compensation along the length direction when thermally expanded, and the rounded corner design eliminates local stress. At the same time, the high temperature resistance of Co20 / Co50 material and the active heat dissipation of the water-cooled beam form a synergistic effect, so that the temperature gradient of the heat-resistant pad is controlled within the material tolerance range. Attached Figure Description

[0019] Figure 1 This is a front view of a heat-resistant pad in the prior art;

[0020] Figure 2 This is a side view of a heat-resistant pad in the prior art;

[0021] Figure 3 This is a schematic diagram of the overall structure of the novel heat-resistant pad of this utility model;

[0022] Figure 4 This is a front side view of the novel heat-resistant pad of this utility model;

[0023] Figure 5 This is a utility model Figure 4 Sectional view at point AA;

[0024] Figure 6 This is a schematic diagram of the bottom structure of the novel heat-resistant pad of this utility model;

[0025] Figure 7 This is a utility model Figure 6 A schematic diagram showing a 90° rotation at point BB;

[0026] Figure 8 This is a schematic diagram of the structure of the heat-resistant pad block of this utility model fixed on the water-cooled beam;

[0027] In the diagram: 1. Upper pad; 2. Middle pad; 3. Lower pad; 4. Water-cooled beam; 5. Sign groove; 6. First groove; 7. Second slot. Detailed Implementation

[0028] The present invention will be further illustrated below with reference to specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0029] like Figure 1 , Figure 2As shown, this is a heat-resistant pad in the prior art. The upper surface of the existing heat-resistant pad is set horizontally. When multiple heat-resistant pads are placed together, the high-temperature steel is placed on the heat-resistant pad for a long time, which easily causes wear and tear around the heat-resistant pad, forming a groove with a protrusion in the middle and a depression around the edges. This reduces the contact area between the high-temperature steel and the heat-resistant pad, making the heat-resistant pad unusable and shortening its service life.

[0030] like Figures 3-8 As shown, the novel heat-resistant pad provided in this embodiment is applied to the water-cooled beam 4. The heat-resistant pad body is set on the water-cooled beam 4, and the heat-resistant pad body includes an upper pad 1, a middle pad 2 and a lower pad 3 arranged sequentially from top to bottom.

[0031] In this embodiment, the height of the heat-resistant pad is 75mm or 100mm; the upper pad 1, the middle pad 2 and the lower pad 3 are all cubes with rounded corners, the radius of the rounded corners is 3mm, and the shrinkage rate is 2.8%.

[0032] In this embodiment, the heat-resistant pad is directly formed by casting, without the need for subsequent processing.

[0033] In this embodiment, the width of the heat-resistant pad is in the range of 30mm to 80mm, the overall height of the heat-resistant pad is in the range of 50mm to 110mm, and the interval between adjacent heat-resistant pads is 50mm to 80mm.

[0034] like Figure 2 , Figure 3 As shown, the upper pad 1 has a height of 30mm, a width of 59.5mm, and a length of 149.5mm.

[0035] A lettering groove 5 is embedded in the side end of the upper pad block. The depth of the lettering groove 5 is 1mm. The lettering groove 5 contains text with a protruding thickness of 0.7mm. The lettering is Co20 or Co50.

[0036] like Figures 3-5 As shown, the side end of the middle pad 2 is an isosceles trapezoid. The upper width of the middle pad 2 is 59.5mm, the lower width is 49.5mm, the length of the middle pad 2 is 149.5mm, and the height of the middle pad 2 is 20mm.

[0037] like Figures 4-7 As shown, the width of the lower pad 3 is 49.5mm and the length of the lower pad 3 is 139.5mm; a first groove 6 and a second slot 7 are embedded in the bottom end of the lower pad 3.

[0038] The side of the first groove 6 is a rounded trapezoid with a radius of 3mm; it is located at the center of the bottom of the lower pad 3. The width of the first groove 6 is 14mm, the upper length of the first groove 6 is 106mm, the lower length of the first groove 6 is 120mm, and the height of the first groove 6 is 15mm.

[0039] In this embodiment, the width of the first groove is 25% to 35% of the bottom width, and in this embodiment, its width is 14mm; the height of the first groove is 15mm to 25mm, and in this embodiment, its height is 15mm.

[0040] The second slot 7 is located at the intersection of the bottom surface of the lower pad block 3 and the adjacent side surface. The side surface of the second slot 7 is a rounded trapezoid with a radius of 3mm. The upper end of the second slot 7 is 92mm long, the lower end of the second slot 7 is 123.5mm long, and the height of the second slot 7 is 8mm.

[0041] In this embodiment, the second slot 7 is a welding bevel.

[0042] In this embodiment, the distance between the first groove 6 and the second slot 7 is 5.5 mm.

[0043] In this embodiment, the angle between one side of the inner wall of the second slot 7 and the side of its adjacent lower pad 3 is 105°.

[0044] In this embodiment, the heat-resistant pad is made of Co20 or Co50 heat-resistant material. The structure of the heat-resistant pad in this embodiment is reasonable and can help to disperse pressure and heat. When the heat-resistant pad is subjected to high temperature and pressure, the heat can be transferred relatively evenly, and the stress on each part is uniform, avoiding damage caused by local stress concentration.

[0045] like Figure 8 As shown, the water-cooled beam 4 is existing technology. In this embodiment, the commonly used diameters of the water-cooled beam 4 tubes are Ø114, Ø121, Ø133, Ø140, Ø159, Ø168, and Ø219. In this embodiment, the heat-resistant pad is directly welded to the water-cooled beam.

[0046] The working principle or usage process of this utility model is as follows: First, according to actual usage needs, select heat-resistant pads of appropriate height. Then, align the first groove 6 at the bottom of the lower pad 3 of the heat-resistant pad with the center of the water-cooled beam 4, and simultaneously engage the edges of the water-cooled beam 4 with the second slots 7 on both sides, thus firmly installing the heat-resistant pads on the water-cooled beam 4. Arrange multiple heat-resistant pads continuously along the length of the water-cooled beam 4, and then place the high-temperature steel billet on the heat-resistant pads. The high-temperature steel billet is placed flat on the bearing plane composed of multiple heat-resistant pads. The width contact surface of the upper pad 1 forms a surface contact with the steel billet, and the trapezoidal structure of the middle pad 2 converts the local pressure into a lateral component force. When the heat from the contact surface is conducted through the upper pad 1 to the middle pad 2, the heat flow is accelerated due to the gradual reduction of the cross-sectional area, which, together with the heat dissipation channel of the slot of the lower pad 3, achieves rapid heat exchange. Finally, the heat is transferred to the water-cooled beam 4.

[0047] Because the heat-resistant pads are made of Co20 or Co50 material, their excellent thermal conductivity allows heat to be transferred quickly and relatively evenly, preventing localized overheating. The circulating water within the water-cooled beam 4 continuously removes heat, maintaining the normal operating temperature of the pads.

[0048] The heat-resistant pad of this invention consists of an upper pad, a middle pad, and a lower pad. This layered structure allows the weight of the high-temperature steel to be distributed layer by layer, avoiding concentrated pressure that could cause localized damage to the pad. The isosceles trapezoidal side design of the middle pad ensures more even pressure distribution during transmission, reducing stress concentration. The slotted design of the lower pad, with its first and second grooves, not only increases the contact area with the supporting structure but also further disperses the pressure and facilitates uniform heat transfer.

[0049] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A novel heat-resistant pad, applied to a water-cooled beam (4), wherein the heat-resistant pad body is disposed on the water-cooled beam (4), characterized in that: The heat-resistant pad body includes an upper pad (1), a middle pad (2) and a lower pad (3) arranged sequentially from top to bottom; the upper pad (1) has a lettering groove (5) on its side end, and the lower pad (3) has a first groove (6) and a second slot (7) arranged on both sides of the first groove (6) at its bottom end; the heat conduction in the central area of ​​the heat-resistant pad body is reduced by the first groove (6) and the second slot (7).

2. The novel heat-resistant pad according to claim 1, characterized in that: The radius of the water-cooled beam (4) is 70 mm.

3. The novel heat-resistant pad according to claim 1, characterized in that: The upper pad (1), middle pad (2) and lower pad (3) are all cubes with rounded corners, and the radius of the rounded corners is 3mm.

4. The novel heat-resistant pad according to claim 1, characterized in that: The side ends of the middle pad (2) are isosceles trapezoids.

5. The novel heat-resistant pad according to claim 1, characterized in that: The side of the first groove (6) is a rounded trapezoid with a radius of 3mm, and is located at the center of the bottom of the lower pad (3).

6. The novel heat-resistant pad according to claim 1, characterized in that: The second slot (7) is located at the intersection of the bottom surface of the lower pad (3) and the adjacent side surface. The side surface of the second slot (7) is a rounded trapezoid with a radius of 3mm.

7. The novel heat-resistant pad according to claim 1, characterized in that: The distance between the first groove (6) and the second slot (7) is 5.5 mm.

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