Furnace door vertical opening and closing mechanism

Abstract

The utility model relates to the technical field of coal processing and coking production, and provides a furnace door vertical opening and closing mechanism which is arranged at a furnace opening of a carbonization chamber, the furnace opening is positioned between a main wall and a bottom wall, and the furnace door vertical opening and closing mechanism is characterized by comprising a guide frame, an inner heat-resistant flashboard and an outer heat-insulating flashboard, an inner guide groove and an outer guide groove are formed in the guide frame; the inner heat-resistant gate plate is arranged in the inner guide groove in a lifting manner, and the inner heat-resistant gate plate is separated from the guide frame after moving upwards; the outer heat preservation gate plate is arranged in the outer guide groove in a lifting mode, and the outer heat preservation gate plate is separated from the guide frame after moving upwards. According to the technical scheme, the problem that a furnace door opening and closing structure which can reduce entering of a large amount of cold air and is convenient to maintain is urgently needed in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal processing and coking production, and specifically relates to a vertical opening and closing mechanism for a furnace door. Background Art

[0002] Horizontal heat recovery coke oven eliminates all chemical production processes such as tar separation, ammonium sulfate production, and crude recovery, and has zero wastewater discharge, making it safer and more environmentally friendly. It maximizes the use of high-temperature flue gas waste heat for power generation, achieving the integrated industrial advantages of "coke-electricity integration" and "seamless connection between coke and steel and electric steel". In recent years, it has become the new favorite in the coking field of large domestic steel joint enterprises.

[0003] The horizontal heat recovery coke oven adopts the side-loading tamping form. A coal tower is arranged in the middle of the coke oven to store the blended, crushed and humidified mixed coal to be coked. A hydraulic tamping device is installed under the coal tower. Some enterprises also adopt the form of hydraulic + mechanical tamping. The purpose is to press the loose mixed coal (bulk density 0.7t / m³) into coal cakes (bulk density 0.95~1.0t / m³) to facilitate coal loading operations and reduce burning losses during coking. Before the coal-loading coke pusher carries the formed coal cakes to the designated carbonization chamber, the automatic furnace number recognition and alignment system is used to align with the center line of the carbonization chamber, and then the machine coke side furnace door is removed. The mature coke cake is pushed into the flat coke car on the coke side with the coke pusher, the coke side furnace door is closed, and the coke pusher is withdrawn. The coal-loading and coke-pushing car is aligned for the second time to deliver the coal cakes into the carbonization chamber. The tail baffle of the coal cakes is then locked at the furnace mouth, the coal supporting plate is pulled back, and the side furnace door is closed to complete a round of coke discharging and coal loading operations. The whole process takes approximately 7 minutes.

[0004] The furnace doors of existing horizontal heat recovery coke ovens are generally integrated, and the furnace doors and door frames are sealed with spring blade edges. The disadvantages are: ① After the furnace door is opened, the coke side is opened too large, and a large amount of cold air enters, and the carbonization chamber cools down rapidly, resulting in slow heating in subsequent production, energy waste, and affecting the safety of the furnace body (the temperature of the carbonization chamber drops rapidly, the silicon bricks shrink, and the furnace body is prone to cracks. Generally, the temperature of the carbonization chamber must not be lower than 900℃); ② The furnace door is too heavy, generally more than 10 tons, which makes production operations inconvenient and brings great safety hazards; ③ The spring blade edge is deformed by heat after a period of use, and the seal is not tight. After the wild wind enters, the coke burning loss increases.

[0005] Therefore, there is an urgent need for a furnace door opening and closing structure that can reduce the large amount of cold air entering and is convenient for maintenance. Utility Model Content

[0006] The utility model provides a vertical opening and closing mechanism for a furnace door, which solves the problem in the related art that a furnace door opening and closing structure is urgently needed which can reduce the large amount of cold air entering and is convenient for maintenance.

[0007] The technical solution of the utility model is as follows: a vertical opening and closing mechanism of a furnace door is arranged at the furnace mouth of a carbonization chamber, and the furnace mouth is located between the main wall and the bottom wall. The key lies in: comprising:

[0008] A guide frame, the guide frame is sealed and arranged outside the main wall and located above the bottom wall, and the guide frame is provided with an inner guide groove and an outer guide groove;

[0009] An inner heat-resistant gate plate, the inner heat-resistant gate plate is lifted and arranged in the inner guide groove, and the inner heat-resistant gate plate is separated from the guide frame after being moved up;

[0010] The outer thermal insulation gate is lifted and lowered in the outer guide groove, and is separated from the guide frame after the outer thermal insulation gate moves upward.

[0011] It also includes a heat insulation layer, which is arranged between the guide frame and the main wall.

[0012] The thickness of the thermal insulation layer is 15-25 mm.

[0013] Also includes,

[0014] A furnace column, which is arranged above the bottom wall and outside the guide frame;

[0015] A transverse connecting rod, the outer end of which is connected to the furnace column, and the inner end of which passes through the guide frame and is connected to the main wall.

[0016] Also includes,

[0017] A support frame, which is provided above the inner heat-resistant gate and above the outer heat-insulating gate;

[0018] A support column, wherein the support column is arranged between the support frame and the guide frame, and the support frame and the support column are detachably connected;

[0019] A hoisting wheel is provided on the top of the inner heat-resistant gate plate and the top of the outer heat-insulating gate plate;

[0020] A reversing wheel, wherein the reversing wheel is arranged on the supporting frame;

[0021] A power mechanism, which is arranged on the outer side of the inner heat-resistant gate and the outer side of the outer heat-insulating gate;

[0022] A transmission rope is arranged above the inner heat-resistant gate plate and above the outer thermal insulation gate plate. One end of the transmission rope is connected to the power mechanism, and the other end of the transmission rope is detachably connected to the support frame after passing around the reversing wheel and the lifting wheel. The inner heat-resistant gate plate / the outer thermal insulation gate plate moves upward or downward with the help of the retraction and extension of the transmission rope.

[0023] It also includes a protective cover, which is arranged on the top of the supporting frame, and the reversing wheel is located above the protective cover.

[0024] At least two lifting wheels are arranged on the top of the inner heat-resistant gate plate / the outer heat-insulating gate plate, and all the lifting wheels located above the inner heat-resistant gate plate / the outer heat-insulating gate plate are arranged along the length direction thereof.

[0025] It also includes a guide sleeve, which is provided above the inner guide groove and the outer guide groove, and is arranged on the support column, and is an inverted cone structure.

[0026] The inner heat-resistant gate plate comprises a mesh frame and a casting layer, and the mesh frame is located inside the casting layer.

[0027] The thickness of the guide frame is 850-950 mm, the thickness of the inner heat-resistant gate plate is 240-260 mm, and the thickness of the outer heat-insulating gate plate is 190-210 mm.

[0028] The working principle and beneficial effects of the utility model are as follows: the guide frame is sealed and arranged on the outside of the main wall and is located above the bottom wall, and an inner guide groove and an outer guide groove are arranged on the guide frame; the inner heat-resistant gate is lifted and arranged in the inner guide groove, and the inner heat-resistant gate is separated from the guide frame after it is moved up; the outer insulation gate is lifted and arranged in the outer guide groove, and the outer insulation gate is separated from the guide frame after it is moved up. When the inner heat-resistant gate or the outer insulation gate needs to be repaired, the gate to be repaired can be lifted out from the top of the guide frame by a crane, and then a new gate can be inserted. When the inner heat-resistant gate is lifted out, the outer insulation gate is still plugged and sealed with the guide frame, and when the outer insulation gate is lifted out, the inner heat-resistant gate is still plugged and sealed with the guide frame, that is, there is always one of the inner heat-resistant gate and the outer insulation gate that can seal the furnace mouth, which can reduce the large amount of cold air entering, and avoid the rapid cooling of the carbonization chamber after a large amount of cold air enters, which causes the subsequent production to heat up slowly, wastes energy, affects the safety of the furnace body, and is convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0030] Figure 1 It is the front view of the utility model.

[0031] Figure 2 It is the right view of the utility model.

[0032] Figure 3 for Figure 2 A is an enlarged view of the middle image.

[0033] In the figure: 1. main wall, 2. bottom wall, 3. guide frame, 4. inner heat-resistant gate, 5. outer insulation gate, 6. insulation layer, 7. furnace column, 8. transverse connecting rod, 9. support frame, 10. support column, 11. lifting wheel, 12. reversing wheel, 13. power mechanism, 14. transmission rope, 15. protective cover, 16. guide sleeve. DETAILED DESCRIPTION

[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0035] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0036] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0037] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0038] Example, see Figure 1~Figure 2, is an embodiment of the utility model, and proposes a vertical opening and closing mechanism for the furnace door, which is arranged at the furnace mouth of the carbonization chamber, and the furnace mouth is located between the main wall 1 and the bottom wall 2, and includes a guide frame 3, an inner heat-resistant gate plate 4, and an outer insulation gate plate 5. The guide frame 3 is sealed and arranged on the outer side of the main wall 1 and is located above the bottom wall 2. The guide frame 3 is provided with an inner guide groove and an outer guide groove; the inner heat-resistant gate plate 4 is lifted and arranged in the inner guide groove, and the inner heat-resistant gate plate 4 is separated from the guide frame 3 after moving up; the outer insulation gate plate 5 is lifted and arranged in the outer guide groove, and the outer insulation gate plate 5 is separated from the guide frame 3 after moving up.

[0039] Furthermore, if Figure 2 As shown, it also includes a heat insulation layer 6, which is arranged between the guide frame 3 and the main wall 1. The heat insulation layer 6 can prevent the guide frame 3 from directly contacting the main wall 1, play a role in protecting the guide frame 3 and improving the sealing effect, and at the same time reduce the probability of heat dissipating outward through the guide frame 3, further reducing energy waste. The heat insulation layer 6 is a layered structure made of zirconium-containing ceramic fiber blanket, which can withstand extremely high temperatures, and the temperature resistance range can usually reach 1000~1430℃. The thickness of the heat insulation layer 6 is 15-25mm and preferably 20mm. On the premise of ensuring that the use requirements are met, the thickness of the heat insulation layer 6 is reduced as much as possible to save costs.

[0040] Furthermore, if Figure 1 and Figure 2 As shown, it also includes a furnace column 7 and a transverse connecting rod 8. The furnace column 7 is arranged above the bottom wall 2 and is located outside the guide frame 3; the outer end of the transverse connecting rod 8 is connected to the furnace column 7, and the inner end of the transverse connecting rod 8 passes through the guide frame 3 and is connected to the main wall 1. The furnace column 7 is close to the outside of the guide frame 3, which can support and limit the guide frame 3. The transverse connecting rod 8 is connected between the furnace column 7 and the main wall 1, so as to clamp and fix the guide frame 3. The structure is simple, the connection is firm and reliable, and the disassembly and assembly are convenient and fast, saving time and effort. The transverse connecting rod 8 is threadedly connected to the furnace column 7, and a sleeve is arranged in the main wall 1. The transverse connecting rod 8 is threadedly connected to the sleeve, and the connection is firm and reliable, and the disassembly and assembly are convenient and fast, saving time and effort.

[0041] Furthermore, if Figure 1 and Figure 2As shown, it also includes a support frame 9, a support column 10, a lifting wheel 11, a reversing wheel 12, a power mechanism 13, and a transmission rope 14. There are support frames 9 above the inner heat-resistant gate plate 4 and above the outer insulation gate plate 5; the support column 10 is arranged between the support frame 9 and the guide frame 3, and the support frame 9 and the support column 10 are detachably connected; a lifting wheel 11 is arranged on the top of the inner heat-resistant gate plate 4 and the top of the outer insulation gate plate 5; the reversing wheel 12 is arranged on the support frame 9; a power mechanism 13 is arranged on the outside of the inner heat-resistant gate plate 4 and the outside of the outer insulation gate plate 5; a transmission rope 14 is arranged above the inner heat-resistant gate plate 4 and above the outer insulation gate plate 5, one end of the transmission rope 14 is connected to the power mechanism 13, and the other end of the transmission rope 14 is detachably connected to the support frame 9 after bypassing the reversing wheel 12 and the lifting wheel 11, and the inner heat-resistant gate plate 4 / the outer insulation gate plate 5 moves upward or downward with the help of the retraction and extension of the transmission rope 14.

[0042] There are two power mechanisms 13, transmission ropes 14 and support frames 9, and a reversing wheel 12 is arranged above each support frame 9. The transmission rope 14 on one power mechanism 13 passes around the reversing wheel 12 on the support frame 9 above the inner heat-resistant gate plate 4, the lifting wheel 11 above the inner heat-resistant gate plate 4, and then is connected to the support frame 9 above the inner heat-resistant gate plate 4. The transmission rope 14 on the other power mechanism 13 passes around the reversing wheel 12 on the support frame 9 above the outer insulation gate plate 5, the lifting wheel 11 above the outer insulation gate plate 5, and then is connected to the support frame 9 above the outer insulation gate plate 5. When the power mechanism 13 rotates so that the transmission rope 14 is retracted, the transmission rope 14 drives the hoisting wheel 11 to rise, thereby driving the inner heat-resistant gate plate 4 / outer heat-insulating gate plate 5 to rise, and the support frame 9 is separated from the support column 10, and the inner heat-resistant gate plate 4 / outer heat-insulating gate plate 5 can be lifted out from the top of the guide frame 3 by a crane, and then the corresponding transmission rope 14 can be separated from the support frame 9. The structure is simple and the operation is convenient.

[0043] Furthermore, if Figure 1 and Figure 2 As shown, a protective cover 15 is also included, and the protective cover 15 is arranged on the top of the supporting frame 9, and the reversing wheel 12 is located above the protective cover 15. The protective cover 15 can reduce the temperature drop, prevent the heated inner heat-resistant gate plate 4 and the outer heat-insulating gate plate 5 from being cooled suddenly during lifting and accelerated damage, and play a role in protecting the inner heat-resistant gate plate 4 and the outer heat-insulating gate plate 5.

[0044] Furthermore, if Figure 1As shown, at least two hoisting wheels 11 are arranged on the top of the inner heat-resistant gate plate 4 / outer heat-insulating gate plate 5, and all the hoisting wheels 11 located above the inner heat-resistant gate plate 4 / outer heat-insulating gate plate 5 are arranged along the length direction thereof. Taking the inner heat-resistant gate plate 4 and the outer heat-insulating gate plate 5 as an example, the length directions of the inner heat-resistant gate plate 4 and the outer heat-insulating gate plate 5 are arranged along the left and right directions, and two left and right hoisting wheels 11 are arranged above the inner heat-resistant gate plate 4 and the outer heat-insulating gate plate 5, so that the inner heat-resistant gate plate 4 and the outer heat-insulating gate plate 5 have two force points, and the stability during the lifting process is better.

[0045] Furthermore, if Figure 2 and Figure 3 As shown, it also includes a guide sleeve 16. There is a guide sleeve 16 above the inner guide groove and the outer guide groove. The guide sleeve 16 is set on the support column 10, and the guide sleeve 16 is an inverted cone structure. Taking the example that the length directions of the inner heat-resistant gate plate 4 and the outer insulation gate plate 5 are both set along the left-right direction, the guide sleeve 16 is an inverted cone structure surrounded by the front side plate, the rear side plate, the left side plate and the right side plate, the horizontal spacing between the inner wall of the left plate and the inner wall of the right side plate decreases linearly from top to bottom, and the horizontal spacing at the upper end is greater than the length of the inner heat-resistant gate plate 4 / the outer insulation gate plate 5 along the left-right direction, and the horizontal spacing at the lower end is equal to the length of the inner heat-resistant gate plate 4 / the outer insulation gate plate 5 along the left-right direction, the horizontal spacing between the inner wall of the front side plate and the inner wall of the rear side plate decreases linearly from top to bottom, and the horizontal spacing at the upper end is greater than the thickness of the inner heat-resistant gate plate 4 / the outer insulation gate plate 5 along the front-to-back direction, and the horizontal spacing at the lower end is equal to the thickness of the inner heat-resistant gate plate 4 / the outer insulation gate plate 5 along the front-to-back direction, so that the inner heat-resistant gate plate 4 can smoothly enter the inner guide groove, and the outer insulation gate plate 5 can smoothly enter the outer guide groove, which is simpler and more convenient to install.

[0046] Furthermore, the inner heat-resistant gate plate 4 includes a mesh frame and a casting layer, and the mesh frame is located inside the casting layer. The mesh frame is a grid structure formed by splicing rods with a diameter of 12 mm. The spacing between two adjacent rods is 200 mm. The material of the rod is 310S, which is resistant to high temperature. The mesh frame can enhance the integrity of the inner heat-resistant gate plate 4, prevent cracks from occurring, and extend the service life. The casting layer uses a high-aluminum material with good thermal shock stability: Al2O3 + SiO2 should not be less than 70%, the compressive strength at room temperature 110℃ × 24h ≥ 50MPa, the flexural strength at room temperature 110℃ × 24h ≥ 8MPa, the thermal shock resistance (1100℃ × 3h, water cooling) ≥ 20 times, and the line change 1100℃ × 3h is within the range of ± 0.3%.

[0047] Further, the thickness of the guide frame 3 is 850-950 mm and preferably 900 mm, the thickness of the inner heat-resistant gate plate 4 is 240-260 mm and preferably 250 mm, and the thickness of the outer heat-insulating gate plate 5 is 190-210 mm and preferably 200 mm. The guide frame 3 has a sufficiently large thickness, so that the inner heat-resistant gate plate 4 and the outer heat-insulating gate plate 5 both have a sufficiently large thickness, the inner heat-resistant gate plate 4 can better play a high temperature resistance and heat insulation effect, and the outer heat-insulating gate plate 5 can better play a heat insulation effect.

[0048] In this embodiment, the guide frame 3 is sealed and arranged on the outside of the main wall 1 and is located above the bottom wall 2. The guide frame 3 and the insulation layer 6 are clamped between the left and right furnace columns 7 and the main wall 1, and are locked together with the main wall 1 through a transverse connecting rod 8. An inner guide groove and an outer guide groove are arranged on the guide frame 3, the inner heat-resistant gate plate 4 is lifted and lowered in the inner guide groove, and the outer insulation gate plate 5 is lifted and lowered in the outer guide groove. The length directions of the inner heat-resistant gate plate 4 and the outer insulation gate plate 5 are arranged along the left-right direction, and the front and rear power mechanisms 13 are both located on the left side of the leftmost support column 10. Four reversing wheels 12 are arranged on the front and rear support frames 9 along the left-right direction, and two lifting wheels 11 are arranged on the inner heat-resistant gate plate 4 and the outer insulation gate plate 5 along the left-right direction. One end of a transmission rope 14 is connected to the front power mechanism 13, and the other end is connected to the front support frame 9 after bypassing the front reversing wheel 12 and the lifting wheel 11, and one end of the other transmission rope 14 is connected to the rear power mechanism 13, and the other end is connected to the rear support frame 9 after bypassing the rear reversing wheel 12 and the lifting wheel 11.

[0049] When the inner heat-resistant gate plate 4 or the outer insulation gate plate 5 needs to be repaired, the power mechanism 13 rotates so that the transmission rope 14 is retracted, and the transmission rope 14 drives the hoisting wheel 11 to rise, thereby driving the inner heat-resistant gate plate 4 / outer insulation gate plate 5 to rise, and the support frame 9 is separated from the support column 10, and the inner heat-resistant gate plate 4 / outer insulation gate plate 5 can be lifted out from the top of the guide frame 3 by a crane, and then the corresponding transmission rope 14 is separated from the support frame 9. Then insert a new inner heat-resistant gate plate 4 / outer insulation gate plate 5, and then lock the support frame 9 and the support column 10, and then connect the transmission rope 14 to the support frame 9 after passing the reversing wheel 12 and the hoisting wheel 11.

[0050] When the inner heat-resistant gate plate 4 is lifted out, the outer insulation gate plate 5 is still plugged and sealed with the guide frame 3. When the outer insulation gate plate 5 is lifted out, the inner heat-resistant gate plate 4 is still plugged and sealed with the guide frame 3. That is to say, there is always one of the inner heat-resistant gate plate 4 and the outer insulation gate plate 5 that can seal the furnace mouth, which can reduce the large amount of cold air entering, avoid the rapid cooling of the carbonization chamber after a large amount of cold air enters, resulting in slow heating in subsequent production, energy waste, affecting the safety of the furnace body, and facilitating maintenance.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A furnace door vertical opening and closing mechanism, arranged at the furnace opening of the carbonization chamber, wherein the furnace opening is located between the main wall (1) and the bottom wall (2), characterized in that: include, A guide frame (3), the guide frame (3) being sealingly arranged on the outside of the main wall (1) and located above the bottom wall (2), the guide frame (3) being provided with an inner guide groove and an outer guide groove; An inner heat-resistant gate plate (4), the inner heat-resistant gate plate (4) being arranged in the inner guide groove in a lifting manner, and the inner heat-resistant gate plate (4) being separated from the guide frame (3) after being moved upward; An external thermal insulation gate (5), the external thermal insulation gate (5) being arranged in the external guide groove in a lifting manner, and the external thermal insulation gate (5) being separated from the guide frame (3) after being moved upward.

2. The furnace door vertical opening and closing mechanism according to claim 1, characterized in that: It also comprises a heat insulation layer (6), wherein the heat insulation layer (6) is arranged between the guide frame (3) and the main wall (1).

3. The furnace door vertical opening and closing mechanism according to claim 2, characterized in that: The thickness of the thermal insulation layer (6) is 15-25 mm.

4. The furnace door vertical opening and closing mechanism according to claim 1, characterized in that: Also includes, A furnace column (7), the furnace column (7) being arranged above the bottom wall (2) and located outside the guide frame (3); A transverse connecting rod (8), wherein the outer end of the transverse connecting rod (8) is connected to the furnace column (7), and the inner end of the transverse connecting rod (8) passes through the guide frame (3) and is connected to the main wall (1).

5. The furnace door vertical opening and closing mechanism according to claim 1, characterized in that: Also includes, A support frame (9), wherein the support frame (9) is provided above the inner heat-resistant gate plate (4) and above the outer heat-insulating gate plate (5); A support column (10), wherein the support column (10) is arranged between the support frame (9) and the guide frame (3), and the support frame (9) and the support column (10) are detachably connected; A hoisting wheel (11), the hoisting wheel (11) being arranged on the top of the inner heat-resistant gate plate (4) and the top of the outer heat-insulating gate plate (5); A reversing wheel (12), the reversing wheel (12) being arranged on the supporting frame (9); A power mechanism (13), the power mechanism (13) being arranged on the outside of the inner heat-resistant gate plate (4) and the outside of the outer heat-insulating gate plate (5); A transmission rope (14) is provided above the inner heat-resistant gate plate (4) and above the outer heat-insulating gate plate (5). One end of the transmission rope (14) is connected to the power mechanism (13), and the other end of the transmission rope (14) is detachably connected to the support frame (9) after passing through the reversing wheel (12) and the hoisting wheel (11). The inner heat-resistant gate plate (4) / the outer heat-insulating gate plate (5) moves upward or downward by means of the retraction and extension of the transmission rope (14).

6. The furnace door vertical opening and closing mechanism according to claim 5, characterized in that: It also comprises a protective cover (15), wherein the protective cover (15) is arranged on the top of the supporting frame (9), and the reversing wheel (12) is located above the protective cover (15).

7. The furnace door vertical opening and closing mechanism according to claim 5, characterized in that: At least two lifting wheels (11) are arranged on the top of the inner heat-resistant gate plate (4) / the outer heat-insulating gate plate (5), and all the lifting wheels (11) located above the inner heat-resistant gate plate (4) / the outer heat-insulating gate plate (5) are arranged along the length direction thereof.

8. The furnace door vertical opening and closing mechanism according to claim 5, characterized in that: It also comprises a guide sleeve (16), wherein the guide sleeve (16) is provided above the inner guide groove and the outer guide groove, the guide sleeve (16) is arranged on the support column (10), and the guide sleeve (16) is an inverted cone structure.

9. The furnace door vertical opening and closing mechanism according to claim 1, characterized in that: The inner heat-resistant gate plate (4) comprises a mesh skeleton and a casting layer, and the mesh skeleton is located inside the casting layer.

10. The furnace door vertical opening and closing mechanism according to claim 1, characterized in that: The thickness of the guide frame (3) is 850-950 mm, the thickness of the inner heat-resistant gate plate (4) is 240-260 mm, and the thickness of the outer heat-insulating gate plate (5) is 190-210 mm.

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