Cover plate of burial pit

Abstract

The utility model belongs to the technical field of metallurgy, and discloses a burial pit cover plate. The burial pit cover plate comprises an arched plate, a reinforcing plate and a heat insulation layer. The arching plate is in axial symmetry, two ends of the arching plate are lower than the middle of the arching plate, the arching plate comprises an upper-layer plate and a lower-layer plate, and a hollow isolation layer is formed between the upper-layer plate and the lower-layer plate in a spaced mode. The reinforcing plates are arranged on the hollow isolation layer, and the two ends of each reinforcing plate are connected to the upper layer plate and the lower layer plate correspondingly. The heat-insulating layer is arranged on the side, away from the upper-layer plate, of the The burial pit cover plate is not easy to deform, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgy, in particular to a slow cooling pit cover plate. Background Art

[0002] Slow cooling refers to the process of slowly cooling certain steel materials in a slow cooling pit in order to eliminate white spots in the steel and avoid cracks caused by thermal stress and structural stress during the re-cooling process. The quality of the slow cooling process has a great impact on the quality of the steel.

[0003] At present, the slow cooling pit cover is generally a rectangular flat plate structure, and rock wool is arranged on the rectangular flat plate for heat insulation. In long-term use, this slow cooling pit cover gradually deforms due to high temperature until it no longer meets the use conditions, and the cover needs to be re-calibrated and welded or replaced with a new cover. Utility Model Content

[0004] The utility model aims to provide a slow cooling pit cover plate, which can reduce the deformation of the slow cooling pit cover plate during use and prolong the service life of the slow cooling pit cover plate.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The slow cooling pit cover plate is used to cover the slow cooling pit, including:

[0007] An axially symmetrical arched plate, both ends of which are lower than the middle part of the arched plate, the arched plate comprises an upper plate and a lower plate, and a hollow insulating layer is formed between the upper plate and the lower plate;

[0008] A plurality of reinforcing plates, wherein the reinforcing plates are arranged in the hollow insulating layer, and two ends of the reinforcing plates are respectively connected to the upper plate and the lower plate;

[0009] The heat insulation layer is arranged on a side of the lower plate facing away from the upper plate.

[0010] Optionally, the arched plate includes a first inclined plate, a horizontal plate and a second inclined plate, all of which have the hollow insulating layer. The first inclined plate and the second inclined plate are respectively arranged at both ends of the horizontal plate and both extend obliquely downward from the horizontal plate. The first inclined plate and the second inclined plate are axially symmetrical.

[0011] Optionally, it also includes a first transverse beam and a second transverse beam, both of which are hollow. The end of the first inclined plate away from the horizontal plate is arranged on the first transverse beam, and the end of the second inclined plate away from the horizontal plate is arranged on the second transverse beam. The first transverse beam and the second transverse beam are both parallel to the symmetry axis of the arched plate, and the first transverse beam and the second transverse beam are axially symmetrical.

[0012] Optionally, the heat insulation layer is provided on the opposite side walls of the first transverse beam and the second transverse beam.

[0013] Optionally, the slow cooling pit cover plate further includes a columnar protrusion for being clamped, and the columnar protrusion is arranged on a side of the upper plate facing away from the lower plate.

[0014] Optionally, the slow cooling pit cover plate further includes a first reinforcing rib plate and a second reinforcing rib plate, wherein the first reinforcing rib plate and the second reinforcing rib plate are both arranged on the upper plate and are respectively connected to both sides of the columnar protrusion.

[0015] Optionally, a recessed positioning portion is provided on the upper plate, and the cylindrical protruding portion is arranged in the recessed positioning portion.

[0016] Optionally, the cylindrical protrusion comprises a hollow tube.

[0017] Optionally, a plurality of anchor claws are provided on the lower plate, and each of the anchor claws extends into the thermal insulation layer.

[0018] Optionally, the arched plate is provided with an observation hole which passes through from top to bottom.

[0019] Beneficial effects of the utility model:

[0020] The slow cooling pit cover provided by the utility model has a higher bearing capacity of the arched plate compared with the rectangular flat plate in the prior art, which improves the structural stability of the slow cooling pit cover, and the structure of the axisymmetric arched plate is more stable, which is conducive to reducing the degree of thermal deformation of the arched plate. The reinforcing plate supports the upper plate and the lower plate between the upper plate and the lower plate, further improving the structural stability of the slow cooling pit cover; the heat insulation layer is arranged on the side of the lower plate away from the upper plate, that is, located in the slow cooling pit, and the heat insulation layer greatly isolates the high temperature radiation in the slow cooling pit, reducing the degree of gradual deformation of the lower plate and the upper plate due to high temperature; the hollow insulation layer avoids solid heat transfer between the upper plate and the lower plate, thereby reducing the slow deformation of the upper plate due to high temperature, and the hollow insulation layer and the heat insulation layer cooperate to ensure the slow cooling of the slow cooling pit. The slow cooling pit cover is not easy to deform, and its service life is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the slow cooling pit cover provided by the embodiment of the utility model being arranged on the slow cooling pit;

[0022] Figure 2 It is a top view schematic diagram of the slow cooling pit cover plate provided by the embodiment of the utility model;

[0023] Figure 3 yes Figure 2 AA view in the figure;

[0024] Figure 4 yes Figure 3 The enlarged schematic diagram at A in the middle;

[0025] Figure 5 yes Figure 2 BB view in the figure.

[0026] In the figure:

[0027] 1. Slow cooling pit;

[0028] 100, arched plate; 111, upper plate; 112, lower plate; 113, hollow insulating layer; 121, first inclined plate; 122, horizontal plate; 123, second inclined plate; 124, lifting lug;

[0029] 200, reinforcement plate;

[0030] 300, thermal insulation layer;

[0031] 401, first transverse beam; 402, second transverse beam;

[0032] 500, cylindrical protrusion;

[0033] 601, first reinforcing rib plate; 602, second reinforcing rib plate;

[0034] 700, recessed positioning portion;

[0035] 800, Anchor claw;

[0036] 900. Observation hole. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] like Figure 1 As shown, this embodiment provides a slow cooling pit cover plate, which is used to cover the slow cooling pit 1.

[0042] like Figure 1-Figure 4 As shown, the slow cooling pit cover plate includes an arched plate 100, a reinforcing plate 200 and an insulating layer 300. The arched plate 100 is axially symmetrical, and both ends of the arched plate 100 are lower than the middle part. The arched plate 100 includes an upper plate 111 and a lower plate 112, and a hollow insulating layer 113 is formed between the upper plate 111 and the lower plate 112. A plurality of reinforcing plates 200 are provided, and the reinforcing plates 200 are arranged in the hollow insulating layer 113, and the two ends are respectively connected to the upper plate 111 and the lower plate 112. The insulating layer 300 is arranged on the side of the lower plate 112 away from the upper plate 111. The arrangement of the reinforcing plates 200 can be adaptively selected. In this embodiment, the reinforcing plates 200 are crisscrossed and arranged in the hollow insulating layer 113. Optionally, the thickness of the hollow insulating layer 113 is 250 mm, the thickness of the heat insulating layer 300 is 80 mm, the thickness of the upper plate 111 is 10 mm, and the thickness of the lower plate 112 is 10 mm, so that the total thickness of the arched plate 100 is 350 mm.

[0043] The slow cooling pit cover provided in this embodiment has an arched plate 100, which has a higher load-bearing capacity than the rectangular flat plate in the prior art, thereby improving the structural stability of the slow cooling pit cover. The axisymmetric arched plate 100 has a more stable structure, which is beneficial to reducing the degree of thermal deformation of the arched plate 100. The reinforcing plate 200 supports the upper plate 111 and the lower plate 112 between the upper plate 111 and the lower plate 112, further improving the structural stability of the slow cooling pit cover. The thermal insulation layer 300 is arranged on the side of the lower plate 112 away from the upper plate 111, that is, it is located in the slow cooling pit 1. The thermal insulation layer 300 greatly isolates the high-temperature radiation in the slow cooling pit 1, reducing the degree of gradual deformation of the lower plate 112 and the upper plate 111 due to high temperature. There is no other object in the hollow insulating layer 113 except the reinforcing plate 200, and air is used for insulation to avoid solid heat transfer between the upper plate 111 and the lower plate 112, thereby reducing the slow deformation of the upper plate 111 due to high temperature. The hollow insulating layer 113 and the heat insulation layer 300 cooperate to ensure the slow cooling of the slow cooling pit 1. The slow cooling pit cover is not easy to deform, which prolongs its service life.

[0044] like Figure 2 and Figure 3 As shown, specifically, the arched plate 100 includes a first inclined plate 121, a horizontal plate 122 and a second inclined plate 123, all of which have a hollow insulating layer 113. The first inclined plate 121 and the second inclined plate 123 are respectively arranged at both ends of the horizontal plate 122, and both extend obliquely downward from the horizontal plate 122. The first inclined plate 121 and the second inclined plate 123 are axially symmetrical, thereby forming an axially symmetrical arched plate 100. The arched plate 100 has a simple structure, low cost, and is easy to manufacture.

[0045] like Figure 2 and Figure 4 As shown, in this embodiment, an observation hole 900 is provided on the arch plate 100. The number of the observation holes 900 can be multiple, specifically opened on the first inclined plate 121 and the second inclined plate 123, so as to obtain the situation in the slow cooling pit 1 through the observation holes 900.

[0046] like Figure 3 and Figure 4 As shown, in order to securely fix the heat insulation layer 300 on the lower plate 112 , optionally, a plurality of anchor claws 800 are provided on the lower plate 112 , and each anchor claw 800 extends into the heat insulation layer 300 to constrain the heat insulation layer 300 .

[0047] like Figure 1 and Figure 3As shown, in this embodiment, the slow cooling pit cover plate further includes a first transverse beam 401 and a second transverse beam 402, both of which are hollow. The first transverse beam 401 and the second transverse beam 402 are both parallel to the symmetry axis of the arched plate 100, and the end of the first inclined plate 121 away from the horizontal plate 122 is arranged on the first transverse beam 401, and the end of the second inclined plate 123 away from the horizontal plate 122 is arranged on the second transverse beam 402, and the first transverse beam 401 and the second transverse beam 402 are axially symmetrical. The first transverse beam 401 and the second transverse beam 402 are used to be placed on the edge of the slow cooling pit 1, so as to support the arched plate 100. The hollow first transverse beam 401 and the second transverse beam 402 further isolate the solid heat transfer between the edge of the slow cooling pit 1 and the arched plate 100, thereby improving the structural stability of the arched plate 100. The first transverse beam 401 and the second transverse beam 402 are arranged axially symmetrically, which is conducive to the overall force balance of the slow cooling pit cover plate and improves the overall structural stability. Exemplarily, the cross-sections of the first transverse beam 401 and the second transverse beam 402 are both rectangular.

[0048] Furthermore, the side walls opposite to the first transverse beam 401 and the second transverse beam 402 are both provided with a heat insulation layer 300, so as to further reduce the heat received by the first transverse beam 401 and the second transverse beam 402 and improve the structural reliability of the slow cooling pit cover.

[0049] In the prior art, a rectangular flat-plate slow cooling pit cover is generally provided with a lifting lug. When hoisting the slow cooling pit cover, it is necessary to manually hang the lifting chain to the lifting lug, which is inconvenient to operate and inefficient. In addition to the lifting lug 124 provided on the slow cooling pit cover in this embodiment, in order to facilitate the lifting of the slow cooling pit cover, the slow cooling pit cover may also include a cylindrical protrusion 500 for clamping, and the cylindrical protrusion 500 is provided on the side of the upper plate 111 away from the lower plate 112. Specifically, the cylindrical protrusion 500 is horizontally fixed on the upper plate 111 of the horizontal plate 122. The cylindrical protrusion 500 can be directly clamped by the clamp lifting device at the work site to lift the slow cooling pit cover, which is convenient for transporting the slow cooling pit cover.

[0050] like Figure 3 As shown, optionally, a recessed positioning portion 700 is provided on the upper plate 111, and the cylindrical protrusion 500 is partially arranged in the recessed positioning portion 700. The cylindrical protrusion 500 is installed by the recessed positioning portion 700, and the positioning is accurate, which facilitates the fixing of the cylindrical protrusion 500 on the upper plate 111. Specifically, the thickness of the first inclined plate 121 and the second inclined plate 123 are both greater than the thickness of the horizontal plate 122, the upper end of the lower end surface of the first inclined plate 121 is flush with the lower end surface of the horizontal plate 122, and the upper end of the lower end surface of the second inclined plate 123 is flush with the lower end surface of the horizontal plate 122, thereby forming a groove serving as the recessed positioning portion 700. In this embodiment, the cylindrical protrusion 500 is welded and fixed to the upper plate 111. The welding strength is high to improve the structural stability and reduce the deformation risk of the slow cooling pit cover plate.

[0051] like Figure 5 As shown, optionally, the slow cooling pit cover plate also includes a first reinforcing rib plate 601 and a second reinforcing rib plate 602, and the first reinforcing rib plate 601 and the second reinforcing rib plate 602 are both arranged on the upper plate 111 and are respectively connected to both sides of the columnar protrusion 500. The first reinforcing rib plate 601 and the second reinforcing rib plate 602 are used to improve the structural strength of the slow cooling pit cover plate and reduce the risk of deformation during high temperature and hoisting. Furthermore, the first reinforcing rib plate 601 and the second reinforcing rib plate 602 are both distributed in multiples along the length direction of the columnar protrusion 500. In this embodiment, the first reinforcing rib plate 601 and the second reinforcing rib plate 602 are both welded and fixed to the upper plate 111 of the horizontal plate 122.

[0052] like Figure 5 As shown, in this embodiment, the columnar protrusion 500 is a hollow pipe column, which is beneficial to reducing the weight of the slow cooling pit cover plate and achieving lightweight.

[0053] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A slow cooling pit cover plate, used for covering a slow cooling pit (1), characterized in that: include: An axially symmetrical arched plate (100), wherein both ends of the arched plate (100) are lower than the middle thereof, and the arched plate (100) comprises an upper plate (111) and a lower plate (112), wherein a hollow insulating layer (113) is formed between the upper plate (111) and the lower plate (112); A plurality of reinforcing plates (200), wherein the reinforcing plates (200) are arranged in the hollow insulating layer (113), and two ends of the reinforcing plates are respectively connected to the upper plate (111) and the lower plate (112); A heat insulating layer (300) is arranged on a side of the lower plate (112) facing away from the upper plate (111).

2. The slow cooling pit cover plate according to claim 1, characterized in that: The arched plate (100) comprises a first inclined plate (121), a horizontal plate (122) and a second inclined plate (123), all of which have the hollow insulating layer (113); the first inclined plate (121) and the second inclined plate (123) are respectively arranged at two ends of the horizontal plate (122), and both extend obliquely downward from the horizontal plate (122); the first inclined plate (121) and the second inclined plate (123) are axially symmetrical.

3. The slow cooling pit cover plate according to claim 2, characterized in that: The slow cooling pit cover plate also includes a first transverse beam (401) and a second transverse beam (402) both of which are hollow. The first transverse beam (401) and the second transverse beam (402) are both parallel to the symmetry axis of the arched plate (100). One end of the first inclined plate (121) away from the horizontal plate (122) is arranged on the first transverse beam (401), and one end of the second inclined plate (123) away from the horizontal plate (122) is arranged on the second transverse beam (402). The first transverse beam (401) and the second transverse beam (402) are axially symmetrical.

4. The slow cooling pit cover plate according to claim 3, characterized in that: The heat insulation layer (300) is provided on the side walls of the first transverse beam (401) and the second transverse beam (402) that are opposite to each other.

5. The slow cooling pit cover plate according to claim 1, characterized in that: The slow cooling pit cover plate further comprises a columnar protrusion (500) for being clamped, wherein the columnar protrusion (500) is arranged on a side of the upper plate (111) facing away from the lower plate (112).

6. The slow cooling pit cover plate according to claim 5, characterized in that: The slow cooling pit cover plate also includes a first reinforcing rib plate (601) and a second reinforcing rib plate (602), wherein the first reinforcing rib plate (601) and the second reinforcing rib plate (602) are both arranged on the upper plate (111) and are respectively connected to both sides of the columnar protrusion (500).

7. The slow cooling pit cover plate according to claim 5, characterized in that: The upper plate (111) is provided with a recessed positioning portion (700), and the columnar protrusion (500) is partially arranged in the recessed positioning portion (700).

8. The slow cooling pit cover plate according to claim 5, characterized in that: The cylindrical protrusion (500) comprises a hollow tube.

9. The slow cooling pit cover plate according to any one of claims 1 to 8, characterized in that: A plurality of anchor claws (800) are arranged on the lower plate (112), and each of the anchor claws (800) extends into the heat insulation layer (300).

10. The slow cooling pit cover plate according to any one of claims 1 to 8, characterized in that: The arched plate (100) is provided with an observation hole (900) which passes through from top to bottom.

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