Heat treatment furnace bottom with maintenance chamber

Abstract

According to the technical scheme, the heat treatment furnace bottom is characterized in that the furnace bottom is provided with a pouring area and a heating area, a furnace bottom plate is arranged in the heating area, a heating groove is formed below the furnace bottom plate, and a heating element, a wiring board set and a first heat preservation layer are arranged in adjacent gaps of the heating groove; a furnace platform is arranged below the furnace bottom, a heat preservation furnace lining is arranged in the furnace platform, a protection plate is arranged on the periphery of the heat preservation furnace lining, a sealing plate is arranged on the protection plate, and a steel platform layer is arranged below the heat preservation furnace lining. A furnace platform base is arranged below the furnace platform and sequentially provided with a bearing wall, a D-shaped base wall and a furnace door base wall from inside to outside, the bearing wall is provided with a branch wall, a door opening is formed in the bottom of the branch wall, a wiring hole is formed in the end, away from the center column, of the branch wall, an inspection door is arranged at the arc-shaped end of the D-shaped base, and a ventilation opening is formed in the straight edge end of the D-shaped base. The heat treatment furnace bottom has the advantages that maintenance is convenient under the condition that normal use of a heat treatment furnace is not affected, and the bearing capacity of the furnace bottom to large workpieces is improved.

Description

Technical Field

[0001] The utility model relates to the field of heat treatment furnaces, in particular to a heat treatment furnace bottom with a maintenance room. Background Art

[0002] Heat treatment is an extremely important process in industrial production. It can improve product quality, extend service life, and reduce production costs. This process uses a heat treatment furnace to perform heat treatments such as quenching, tempering, and carburizing on materials to change the material structure and eliminate the internal stress of the material, thereby improving the mechanical properties of the material. As a type of heat treatment furnace, the trolley-type furnace has excellent thermal stability, thermal shock resistance, and thermal insulation properties. However, the load-bearing structure of the existing trolley-type furnace is a load-bearing bracket provided above the bottom of the furnace. The load-bearing capacity is limited and cannot meet the load-bearing requirements of workpieces of larger size and weight. In addition, the traditional trolley-type furnace is also unable to inspect and repair the heating elements during use, resulting in extended interruptions in operations. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a heat treatment furnace bottom with a maintenance room, so that it is convenient for staff to carry out maintenance without affecting the normal use of the heat treatment furnace, and the bearing capacity of the heat treatment furnace bottom for large workpieces is improved.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a furnace bottom of a heat treatment furnace with an inspection room, comprising an insulating furnace lining, a casting area is provided at the furnace bottom, the outer structure of the casting area is D-shaped, a heating area is provided in the casting area, a furnace bottom plate is provided in the heating area, a heating groove is provided below the furnace bottom plate, a heating element is provided in an adjacent gap of the heating groove, the heating element is connected to the upper end of the terminal board group, and a first insulation layer is provided below the heating element;

[0005] A furnace platform is provided under the furnace bottom, and a multi-layer heat-insulating furnace lining is provided inside the furnace platform. A guard plate is provided on the periphery of the heat-insulating furnace lining, and a sealing plate is provided on the guard plate. A steel platform layer is provided under the heat-insulating furnace lining.

[0006] A furnace base is provided under the furnace base, and the furnace base base is provided with a load-bearing wall, a D-shaped base wall and a furnace door base wall from the inside to the outside. A central column is provided in the center of the load-bearing wall, branch walls are provided around the central column, door openings are provided at the bottom of the branch walls, wiring holes are provided at the end of the branch wall away from the central column, an inspection door is provided at the curved end of the D-shaped foundation, and a vent is provided at the straight end of the D-shaped foundation.

[0007] Furthermore, the furnace bottom plate is provided with an expansion joint of overlapping stopper type.

[0008] Furthermore, the heating trough is provided with a plurality of parallel support bars, the support bar closest to the center point of the casting area is the longest bar, and the support bar farthest from the center point of the casting area is the shortest bar.

[0009] Further, the heating tanks include heating tank No. 1, heating tank No. 2, heating tank No. 3 and heating tank No. 4;

[0010] The outer contour of the No. 1 heating tank is fan-shaped, one end of the longest support bar of the No. 1 heating tank is connected to the No. 1 heating tank, a gap is left between the other end of the longest support bar and the No. 1 heating tank, a gap is left between the second longest support bar and the No. 1 heating tank at the opposite end, and so on until the shortest support bar, and the second longest and shortest support bars are provided with interruptions;

[0011] The No. 2 heating trough and the No. 4 heating trough are symmetrical along the center line of the casting area. The outer contour of the No. 2 heating trough is fan-shaped. One end of the longest support bar of the No. 2 heating trough is connected to the No. 2 heating trough. A gap is left between the other end of the longest support bar and the No. 2 heating trough. A gap is left between the second longest support bar and the No. 2 heating trough at the opposite end, and so on until the shortest support bar, and the three shortest support bars are all provided with interruptions;

[0012] The outer contour of heating tank No. 3 is a triangle. One end of the longest support bar of heating tank No. 3 is connected to heating tank No. 3, and a gap is left between the other end of the longest support bar and heating tank No. 3. The second longest support bar has a gap between the opposite end and heating tank No. 3, and so on until the shortest support bar, and the three shortest support bars are all provided with interruptions.

[0013] Furthermore, the terminal block group passes through the first insulation layer and the furnace table, and the lower end of the terminal block group is flush with the horizontal position of the wiring hole.

[0014] Furthermore, the thermal insulation furnace lining is provided with a second thermal insulation layer, a third thermal insulation layer, a fourth thermal insulation layer and a fifth thermal insulation layer in sequence from top to bottom;

[0015] The casting area is made of high-strength and high-temperature resistant casting material, the heating trough and the second insulation layer are made of heavy high-alumina bricks, the first insulation layer and the third insulation layer are made of lightweight mullite bricks and refractory clay, the fourth insulation layer is made of lightweight casting material, and the fifth insulation layer is made of calcium silicate board.

[0016] Furthermore, the load-bearing wall is an X-shaped load-bearing wall, a star-shaped load-bearing wall or a well-shaped load-bearing wall.

[0017] Furthermore, the upper part of the branch wall and the upper inner part of the D-shaped base wall are both provided with embedded parts.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] (1) A furnace base is provided under the furnace, which greatly improves the bearing capacity of the furnace base for large workpieces. The maintenance room formed by the furnace base makes it convenient for staff to carry out maintenance without affecting the normal use of the heat treatment furnace.

[0020] (2) The base of the furnace is provided with wiring holes and embedded parts that are flush with the lower end of the wiring board group, which is convenient for the early wiring and later maintenance of heating elements, ventilation equipment and lighting equipment.

[0021] (3) Door openings, vents and ventilation equipment are provided inside the furnace base to lower the room temperature inside the furnace base and ensure the safety of the working environment for maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 It is a structural schematic diagram of the furnace bottom described in the utility model;

[0024] Figure 3 It is a sectional view of the furnace bottom and side of the utility model;

[0025] Figure 4 For this utility model Figure 3 A partial enlarged view of point B in the middle;

[0026] Figure 5 A top view of a furnace bottom without a furnace bottom plate according to the utility model;

[0027] Figure 6 This is a structural schematic diagram of a furnace bottom without a furnace bottom plate and a heating element according to the utility model;

[0028] Figure 7 A top view of a furnace bottom without a furnace bottom plate and a heating element according to the utility model;

[0029] Figure 8 It is a structural schematic diagram of the heating tank described in the utility model;

[0030] Fig. 9 A top view of the heating tank described in the utility model;

[0031] Fig.10 It is a structural schematic diagram of the furnace platform described in the utility model;

[0032] Fig.11 It is a side cross-sectional view of the furnace table described in the utility model;

[0033] Fig.12 For this utility model Fig.10 A partial enlarged view of point D in the middle;

[0034] Fig.13 This is a structural schematic diagram of the furnace base described in Example 1 of the utility model;

[0035] Fig.14 It is a side sectional view of the furnace base described in Example 1 of the utility model;

[0036] Fig.15 A top view of the furnace base described in Example 2 of the utility model;

[0037] Fig.16 This is a top view of the furnace base described in Example 3 of the present utility model.

[0038] In the figure: 1, furnace bottom; 11, casting area; 111, heating area; 12, furnace bottom plate; 121, expansion joint; 13, heating tank; 131, heating tank No. 1; 132, heating tank No. 2; 133, heating tank No. 3; 134, heating tank No. 4; 135, support bar; 14, heating element; 15, terminal board group; 16, first insulation layer; 2, furnace platform; 21, insulation lining; 211, second insulation layer; 212, third insulation layer; 21 3. Fourth insulation layer; 214. Fifth insulation layer; 22. Guard plate; 221. Sealing plate; 23. Steel platform layer; 3. Furnace base; 31. Load-bearing wall; 311. Center column; 312. Branch wall; 313. Door opening; 314. Wiring hole; 32. D-shaped base wall; 321. Inspection door; 322. Ventilation hole; 33. Furnace door base wall; 34. Embedded parts; 35. X-shaped load-bearing wall; 36. Star-shaped load-bearing wall; 37. Well-shaped load-bearing wall. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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. Example 1

[0040] like Figure 1-14A heat treatment furnace bottom with an inspection room comprises an insulating furnace lining 21, a furnace bottom 1 is provided with a pouring area 11 to provide initial load-bearing for a workpiece to be heated, the external structure of the pouring area 11 is D-shaped, a heating area 111 is provided in the pouring area 11, and the four heating areas 111 correspond to the inspection room formed by the furnace base 3, so as to facilitate the later inspection of the terminal board group 15, a furnace bottom plate 12 is provided in the heating area 111, and the furnace bottom plate 12 is made of silicon carbonate refractory material to separate the workpiece to be heated from the heating element 14, a heating groove 13 is provided below the furnace bottom plate 12 to provide support for the furnace bottom plate 12, and heating elements 14 are provided in adjacent gaps of the heating groove 13 so that the heating elements 14 are evenly distributed in the furnace bottom 1, the heating elements 14 are connected to the upper end of the terminal board group 15, and a first insulation layer 16 is provided below the heating element 14 to provide initial insulation for the heating element 14;

[0041] A furnace platform 2 is provided below the furnace bottom 1, and a multi-layer heat-insulating furnace lining 21 is provided inside the furnace platform 2 to reduce heat loss and ensure the temperature stability in the heat treatment furnace. A guard plate 22 is provided outside the heat-insulating furnace lining 21 to provide protection for the heat-insulating furnace lining 21 and reduce wear. A sealing plate 221 is provided on the guard plate 22, and the sealing plate 221 is used in conjunction with the sealing structure of the heat treatment furnace body to increase the sealing of the heat treatment furnace. A steel platform layer 23 is provided below the heat-insulating furnace lining 21 to provide a supporting structure for the furnace platform;

[0042] A furnace base 3 is provided under the furnace 2, which greatly improves the bearing capacity of the furnace bottom for large workpieces. The furnace base 3 is provided with a load-bearing wall 31, a D-shaped base wall 32 and a furnace door base wall 33 from the inside to the outside. A central column 311 is provided in the center of the load-bearing wall 31, and branch walls 312 are provided around the central column 311. The branch walls 312 divide the furnace base 3 into four maintenance rooms, which correspond to the four heating zones 111 one by one. A door hole 313 is provided at the bottom of the branch wall 312 to facilitate the passage of maintenance personnel and meet the ventilation requirements of the furnace base 3. A wiring hole 314 is provided at one end of the branch wall 312 away from the central column 311 to reserve space for the wiring of heating elements, ventilation equipment and lighting equipment. An inspection door 321 is provided at one end of the arc of the D-shaped base 32, and a vent 322 is provided at one end of the straight side of the D-shaped base 32 to ensure smooth ventilation of the furnace base 3 and provide a good working environment for maintenance personnel.

[0043] Furthermore, the furnace bottom plate 12 is provided with an expansion joint 121 of overlapping stopper type, which not only reduces the influence of thermal expansion and deformation of the furnace bottom plate 12, but also facilitates loading and unloading;

[0044] Furthermore, the heating tank 13 is provided with a plurality of parallel support bars 135 to support the furnace bottom plate 12, wherein the support bar 135 closest to the center point of the casting area 11 is the longest bar, and the support bar farthest from the center point of the casting area 11 is the shortest bar;

[0045] Furthermore, the heating tank 13 includes a first heating tank 131, a second heating tank 132, a third heating tank 133 and a fourth heating tank 134, and the four heating tanks 13 respectively match the areas defined by the four heating zones 111;

[0046] The outer contour of the No. 1 heating groove 131 is fan-shaped, one end of the longest support bar 135 of the No. 1 heating groove 131 is connected to the No. 1 heating groove 131, and a gap is left between the other end of the longest support bar 135 and the No. 1 heating groove 131, and a gap is left between the second longest support bar 135 and the No. 1 heating groove 131 at the opposite end, and so on until the shortest support bar 135, so that the heating element 14 is arranged in an S shape to improve the integrity of the heating element 14, and the second longest and shortest support bars 135 are provided with interruptions to ensure that the lower end of the terminal board group 15 close to the edge of the heating groove 13 is located in the maintenance room formed by the furnace base 3;

[0047] The second heating groove 132 and the fourth heating groove 134 are symmetrical along the center line of the casting area 11. The outer contour of the second heating groove 132 is fan-shaped. One end of the longest support bar 135 of the second heating groove 132 is connected to the second heating groove 132, and a gap is left between the other end of the longest support bar 135 and the second heating groove 132. The second longest support bar 135 has a gap between the opposite end and the second heating groove 132, and so on until the shortest support bar 135, and the three shortest support bars 135 are all provided with interruptions;

[0048] The outer contour of the third heating groove 133 is a triangle, one end of the longest support bar 135 of the third heating groove 133 is connected to the third heating groove 133, and a gap is left between the other end of the longest support bar 135 and the third heating groove 133, and a gap is left between the second longest support bar 135 and the third heating groove 133 at the opposite end, and so on until the shortest support bar 135, and the three shortest support bars 135 are all provided with interruptions;

[0049] Furthermore, the wiring board group 15 passes through the first insulation layer 16 and the furnace 2, and the lower end of the wiring board group 15 is flush with the horizontal position of the wiring hole 314, which is convenient for the wiring of the wiring board group 15;

[0050] Furthermore, the insulation furnace lining 21 is provided with a second insulation layer 211, a third insulation layer 212, a fourth insulation layer 213 and a fifth insulation layer 214 in sequence from top to bottom, so as to ensure that the furnace bottom 1 has a good heat insulation effect;

[0051] The casting area 11 is made of high-strength high-temperature resistant casting material, the heating tank 111 and the second insulation layer 211 are made of heavy high-aluminum bricks to increase the high-temperature resistance of the furnace bottom 1, the first insulation layer 16 and the third insulation layer 212 are made of lightweight mullite bricks and refractory clay, which not only have low thermal expansion coefficient and high thermal conductivity, but also have good thermal shock resistance and light weight, the fourth insulation layer 213 is made of lightweight casting material to increase the stability of the insulation furnace lining 21, and the fifth insulation layer 214 is made of calcium silicate board to provide good fireproof and waterproof performance for the furnace platform 2;

[0052] Furthermore, the load-bearing wall 31 is an X-shaped load-bearing wall 35, and the internal structure of the casting area 11 matches the structure of the X-shaped load-bearing wall 35, which facilitates the routing and maintenance of the heating elements.

[0053] Furthermore, the upper part of the branch wall 312 and the upper inner part of the D-shaped base wall 32 are both provided with embedded parts 34 to facilitate the routing of heating elements, lighting equipment and ventilation equipment. Example 2

[0054] like Fig.15 As shown, the difference between this embodiment and embodiment 1 is that the load-bearing wall 31 is a star-shaped load-bearing wall 36, and the internal structure of the casting area 11 matches the structure of the star-shaped load-bearing wall 36, which facilitates the routing and maintenance of the heating elements. Example 3

[0055] like Fig.16 As shown, the difference between this embodiment and embodiment 1 is that the load-bearing wall 31 is a well-shaped load-bearing wall 37, and the internal structure of the casting area 11 matches the structure of the well-shaped load-bearing wall 37, which facilitates the routing and maintenance of the heating elements.

[0056] When using:

[0057] A steel platform layer 23 is installed on the load-bearing wall 31 and the D-shaped base wall 32 to increase the stability of the furnace platform 2. An insulating furnace lining 21 is laid on the steel platform layer 23. A guard plate 22 is installed on the outer periphery of the insulating furnace lining 21 to reduce the wear of the insulating furnace lining 21. A casting area 11 is set above the insulating furnace lining 21. Four heating tanks 13 are placed in the heating area 111. A first insulating layer 16 is laid in the heating tank 13. The terminal board group 15 passes through the first insulating layer 16 and the reserved holes of the furnace platform 2. The lower end of the terminal board group 15 is flush with the horizontal position of the wiring hole 314 to facilitate the wiring of the heating element. Then, the heating element 14 is laid on the first insulating layer 16 in an S shape. The heating element 14 is connected to the upper end of the terminal board group 15. The furnace bottom plate 12 is laid above the heating tank 13. A furnace door is installed above the furnace door base wall 33. The sealing plate 221 on the guard plate 22 is used in conjunction with the sealing structure on the movable furnace body.

[0058] The multi-layer insulation furnace lining 21 ensures that the furnace bottom has a good thermal insulation effect. The support bars 135 are arranged equidistantly and the heating elements 14 are arranged in an S shape to achieve uniform heating of the furnace bottom. A furnace base 3 is provided under the furnace table 2 to greatly improve the load-bearing capacity of the furnace bottom 1 for large workpieces. The maintenance room formed by the furnace base 3 makes it convenient for staff to carry out maintenance without affecting the normal use of the heat treatment furnace. The wiring holes 314 and embedded parts 34 provide convenience for the routing of heating elements, lighting equipment and ventilation equipment.

[0059] The undisclosed parts in the present utility model are all prior art, and their specific structures, materials and working principles are not described in detail. Although the embodiments of the present utility model have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the attached claims and their equivalents.

Claims

1. A heat treatment furnace bottom with an inspection room, comprising a heat-insulating furnace lining (21), characterized in that: The furnace bottom (1) is provided with a pouring area (11), the outer structure of the pouring area (11) is D-shaped, a heating area (111) is provided in the pouring area (11), a furnace bottom plate (12) is provided in the heating area (111), a heating groove (13) is provided below the furnace bottom plate (12), a heating element (14) is provided in an adjacent gap of the heating groove (13), the heating element (14) is connected to the upper end of the terminal board group (15), and a first thermal insulation layer (16) is provided below the heating element (14); A furnace platform (2) is provided below the furnace bottom (1), a multi-layer heat-insulating furnace lining (21) is provided inside the furnace platform (2), a guard plate (22) is provided outside the heat-insulating furnace lining (21), a sealing plate (221) is provided on the guard plate (22), and a steel platform layer (23) is provided below the heat-insulating furnace lining (21); A furnace base (3) is provided below the furnace base (2). The furnace base (3) is provided with a load-bearing wall (31), a D-shaped base wall (32) and a furnace door base wall (33) in order from the inside to the outside. A central column (311) is provided at the center of the load-bearing wall (31). Branch walls (312) are provided around the central column (311). A door opening (313) is provided at the bottom of the branch wall (312). A wiring hole (314) is provided at one end of the branch wall (312) away from the central column (311). An inspection door (321) is provided at one curved end of the D-shaped base wall (32). A vent (322) is provided at one straight end of the D-shaped base wall (32).

2. The heat treatment furnace bottom with an inspection chamber according to claim 1, characterized in that: The furnace bottom plate (12) is provided with an overlapping stopper-type expansion joint (121).

3. The heat treatment furnace bottom with an inspection chamber according to claim 1, characterized in that: The heating trough (13) is provided with a plurality of parallel support bars (135), wherein the support bar (135) closest to the center point of the casting area (11) is the longest bar, and the support bar farthest from the center point of the casting area (11) is the shortest bar.

4. The heat treatment furnace bottom with an inspection chamber according to claim 3, characterized in that: The heating tanks (13) include a first heating tank (131), a second heating tank (132), a third heating tank (133) and a fourth heating tank (134); The outer contour of the No. 1 heating groove (131) is fan-shaped, one end of the longest support bar (135) of the No. 1 heating groove (131) is connected to the No. 1 heating groove (131), a gap is left between the other end of the longest support bar (135) and the No. 1 heating groove (131), a gap is left between the second longest support bar (135) and the No. 1 heating groove (131) at the opposite end, and so on until the shortest support bar (135), and the second longest and shortest support bars (135) are provided with interruptions; The second heating groove (132) and the fourth heating groove (134) are symmetrical along the center line of the casting area (11); the outer contour of the second heating groove (132) is fan-shaped; one end of the longest support bar (135) of the second heating groove (132) is connected to the second heating groove (132); a gap is left between the other end of the longest support bar (135) and the second heating groove (132); a gap is left between the second longest support bar (135) and the second heating groove (132) at the opposite end; and so on until the shortest support bar (135); and the three shortest support bars (135) are all provided with interruptions; The outer contour of the third heating groove (133) is a triangle, one end of the longest support bar (135) of the third heating groove (133) is connected to the third heating groove (133), a gap is left between the other end of the longest support bar (135) and the third heating groove (133), a gap is left between the second longest support bar (135) and the third heating groove (133) at the opposite end, and so on until the shortest support bar (135), and the three shortest support bars (135) are all provided with interruptions.

5. The heat treatment furnace bottom with an inspection chamber according to claim 1, characterized in that: The wiring board group (15) passes through the first insulation layer (16) and the furnace table (2), and the lower end of the wiring board group (15) is flush with the horizontal position of the wiring hole (314).

6. The heat treatment furnace bottom with an inspection chamber according to claim 1, characterized in that: The thermal insulation furnace lining (21) is provided with a second thermal insulation layer (211), a third thermal insulation layer (212), a fourth thermal insulation layer (213) and a fifth thermal insulation layer (214) in sequence from top to bottom; The casting area (11) is made of high-strength high-temperature resistant casting material, the heating area (111) and the second insulation layer (211) are made of heavy high-alumina bricks, the first insulation layer (16) and the third insulation layer (212) are made of lightweight mullite bricks and refractory clay, the fourth insulation layer (213) is made of lightweight casting material, and the fifth insulation layer (214) is made of calcium silicate board.

7. The heat treatment furnace bottom with an inspection chamber according to claim 1, characterized in that: The load-bearing wall (31) is an X-shaped load-bearing wall (35), a star-shaped load-bearing wall (36) or a well-shaped load-bearing wall (37).

8. The heat treatment furnace bottom with an inspection chamber according to claim 1, characterized in that: The upper part of the branch wall (312) and the upper inner part of the D-shaped base wall (32) are both provided with embedded parts (34).

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