High-temperature-resistant access door capable of being pulled and overturned

Abstract

The utility model provides a high-temperature-resistant access door capable of being pulled and turned over. The high-temperature-resistant access door comprises a door cover, a door frame and a connecting rod mechanism. The connecting rod mechanism comprises a first connecting rod assembly which is hinged to the door cover and assists the door cover in being pulled out of the door frame to turn over, and a second connecting rod assembly connected with the first connecting rod assembly and the high-temperature equipment. The utility model has the advantages that the design of the first connecting rod component and the second connecting rod component increases the flexibility of opening or closing the door cover; when the door cover needs to be opened, the first connecting rod assembly rotates around the second connecting rod assembly through the pin shaft, and the door cover can be conveniently pulled out of the door frame; after the door cover is separated from the door frame, due to the supporting effect of the second connecting rod assembly and the rotating effect of the first hinge unit and the second hinge unit, the door cover can easily turn over towards the side face to be opened by a larger angle, door opening is effortless, and maintainers can conveniently enter the high-temperature equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature equipment maintenance, in particular to a heat-resistant pull-out and flip-over maintenance door.

Background Art

[0002] The asphalt mixture plant hot recycling combined equipment includes high-temperature equipment such as an exhaust gas chamber, a discharge box, and a hot air furnace. During daily use, these high-temperature equipment will generate relatively high temperatures, which requires adding heat insulation layers inside or outside these high-temperature equipment in the design. At the same time, for these high-temperature equipment, not only heat insulation is required, but sometimes it is also necessary to observe the inside of the equipment and even enter the equipment for maintenance. Therefore, a maintenance door structure needs to be added. Since the external dimensions of these equipment are usually large and need to allow people to pass through, the existing maintenance doors are large in size and heavy in structure, resulting in the problem that it is inconvenient for maintenance personnel to open and close the maintenance doors manually.

[0003] In view of this, this case conducts in-depth research on the above problems, and thus this case is generated.

Content of the Utility Model

[0004] The utility model aims to solve the technical problem that in the prior art, the maintenance door is inconvenient to open and close due to its too large size and heavy structure, and provides a heat-resistant pull-out and flip-over maintenance door, which has heat-resistant performance and is convenient for maintenance personnel to open and close.

[0005] The utility model is realized as follows: A heat-resistant pull-out and flip-over maintenance door includes a door cover and a door frame, and also includes a connecting rod mechanism; the connecting rod mechanism includes a first connecting rod assembly hinged to the door cover and assisting the door cover to be pulled out and flipped from the door frame, and a second connecting rod assembly connecting the first connecting rod assembly and the high-temperature equipment.

[0006] Further, the first connecting rod assembly includes a first arc plate, a second arc plate, and a bending plate. One end of the bending plate is fixedly connected to the first arc plate, and the other end is fixedly connected to the second arc plate; one end of the first arc plate is connected to the door cover through a first hinge unit, and one end of the second arc plate is connected to the door cover through a second hinge unit; the second connecting rod assembly includes a first connecting plate, a second connecting plate, and an angle steel component; one end of the angle steel component is fixedly connected to the first connecting plate, and the other end is fixedly connected to the second connecting plate; one end of the first connecting plate is connected to the first arc plate through a pin shaft, and the other end is connected to the high-temperature equipment through a third hinge unit; one end of the second connecting plate is connected to the second arc plate through a pin shaft, and the other end is connected to the high-temperature equipment through a fourth hinge unit.

[0007] Furthermore, the bending plate includes a first bending panel and a second bending panel set at an angle, the first arc plate includes a first slat and a second slat set at an angle, and the second arc plate includes a third slat and a fourth slat set at an angle; one end of the first bending panel is fixedly connected to the first slat, and the other end is fixedly connected to the third slat, one end of the second bending panel is fixedly connected to the second slat, and the other end is fixedly connected to the fourth slat; one end of the first slat away from the second slat is rotatably connected to the first hinge unit through a pin shaft, and the other end of the second slat is rotatably connected to the first connecting plate through a pin shaft, one end of the third slat away from the fourth slat is rotatably connected to the second hinge unit through a pin shaft, and the other end of the fourth slat is rotatably connected to the second connecting plate through a pin shaft.

[0008] Furthermore, the angle between the first bent panel and the second bent panel is 80-100°, the angle between the first slat and the second slat is 80-100°, and the angle between the third slat and the fourth slat is 80-100°.

[0009] Furthermore, the angle steel component includes a first angle steel plate and a second angle steel plate, the first angle steel plate includes a first horizontal plate and a first vertical plate connected vertically to each other, the second angle steel plate includes a second horizontal plate and a second vertical plate connected vertically to each other, the first horizontal plate is parallel to the second horizontal plate and is spaced apart, and the first vertical plate and the second vertical plate are parallel to and are spaced apart.

[0010] Furthermore, the first hinge unit includes a first base plate, a first hinge plate, and a second hinge plate. The first base plate is fixedly installed on the door cover, the first hinge plate and the second hinge plate are arranged opposite to each other and are both perpendicular to the first base plate, and the pin connecting the first slat is rotatably connected between the first hinge plate and the second hinge plate; the structure of the second hinge unit is the same as that of the first hinge unit.

[0011] Furthermore, the door cover comprises a square inner frame, in which ceramic fiber wool with a thickness of 140-160 mm is embedded.

[0012] Furthermore, a first extension plate is extended outward on any side of the square inner frame, a second extension plate is provided at the end of the first extension plate facing the door frame, a high-temperature resistant sealing strip is provided on the side of the first extension plate facing the door frame, and the square inner frame, the first extension plate and the second extension plate are arranged to form a clearance groove for inserting the door frame; the door frame is a square door frame, and the square inner frame is matched with the square door frame when the inspection door is closed.

[0013] Furthermore, the inspection door also includes a plurality of clamping units for clamping the door cover, and the clamping unit includes an extended pressure plate, a clamping seat, a hinge bolt, a conical handle, and a pin shaft; the extended pressure plate is fixedly installed on the door cover and extends outward, and the end of the extended pressure plate forms a slot for the hinge bolt to be inserted into, the clamping seat is fixedly installed on the high-temperature equipment, the pin shaft passes through the hinge bolt and has both ends rotatably connected to the clamping seat, and the conical handle is threadedly connected to the hinge bolt.

[0014] Furthermore, a handle is installed on the surface of the door cover.

[0015] The advantages of the utility model are:

[0016] 1. The design of the first link assembly and the second link assembly in the inspection door increases the flexibility of opening or closing the door cover; when the door cover needs to be opened, the first link assembly rotates around the second link assembly through the pin shaft, making it convenient to pull the door cover out of the door frame; after the door cover is separated from the door frame, due to the support of the second link assembly and the rotation of the first hinge unit and the second hinge unit, the door cover can be easily flipped to the side to open a larger angle, and opening the door is effortless, making it convenient for maintenance personnel to enter the interior of the high-temperature equipment.

[0017] 2. The design of the bending plate in the first connecting rod assembly can effectively enhance the structural strength of the first connecting rod assembly; the first arc plate and the second arc plate are connected to the first connecting plate and the second connecting plate through a pin shaft, which increases the length and mobility of the first arc plate and the second arc plate, and can ensure that there is enough space to completely pull the door cover out of the door frame; the first arc plate and the second arc plate are hinged to the door cover through a hinge unit, which can easily realize a large-angle flip of the door cover.

[0018] 3. In the second connecting rod assembly, by designing the first horizontal plate and the second horizontal plate to be parallel and spaced apart, and the first vertical plate and the second vertical plate to be parallel and spaced apart, the connection points between the angle steel component and the first connecting plate and the second connecting plate can be effectively dispersed, thereby ensuring the overall structural strength of the second connecting rod assembly while reducing the material used for the angle steel component and saving costs.

[0019] 4. The door cover includes a square inner frame, in which ceramic fiber cotton is embedded. The ceramic fiber cotton is resistant to high temperatures and has good heat insulation effect. The design of the high temperature resistant sealing strip achieves a good sealing and heat insulation effect.

Brief Description of the Drawings

[0020] The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

[0021] Figure 1 It is a structural schematic diagram of the inspection door in the utility model.

[0022] Figure 2 It is one of the structural schematic diagrams of the connecting rod mechanism in the utility model.

[0023] Figure 3 It is the second structural schematic diagram of the connecting rod mechanism in the present utility model.

[0024] Figure 4 It is a cross-sectional view of the connecting rod mechanism in the present utility model.

[0025] Figure 5 It is Figure 3 an enlarged view of part A in

[0026] Figure 6 It is a cross-sectional view of the inspection door in the present utility model.

[0027] Figure 7 It is Figure 6 an enlarged view of part B in

[0028] Figure 8 It is the structural schematic diagram of the pressing unit in the present utility model.

[0029] Figure 9 It is the structural schematic diagram when the inspection door in the present utility model is closed.

[0030] Figure 10 It is the structural schematic diagram when the inspection door in the present utility model is in the pulling state.

[0031] Figure 11 It is the structural schematic diagram when the inspection door in the present utility model is in the flipping state.

[0032] Reference numerals: door cover 1, square inner frame 11, ceramic fiber cotton 12, first extension plate 13, second extension plate 14, high-temperature resistant sealing strip 15, relief groove 16, handle 17, door frame 2, connecting rod mechanism 3, first connecting rod assembly 4, first arc plate 41, first strip 411, second strip 412, second arc plate 42, third strip 421, fourth strip 422, bending plate 43, first bending panel 431, second bending panel 432, second connecting rod assembly 5, first connecting plate 51, second connecting plate 52, angle steel part 53, first angle steel plate part 531, first horizontal plate 5311, first vertical plate 5312, second angle steel plate part 532, second horizontal plate 5321, second vertical plate 5322, first hinge unit 6, first bottom plate 61, first hinge plate 62, second hinge plate 63, second hinge unit 7, third hinge unit 8, second bottom plate 81, third hinge plate 82, fourth hinge plate 83, pin shaft 84, nut 85, fourth hinge unit 9, pressing unit 10, extension pressing plate 101, pressing seat 102, turnbuckle bolt 103, tapered handle 104, pressing pin shaft 105, card slot 106.

Detailed implementation manners

[0033] In order to better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] It should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing these embodiments and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. In addition, the terms "first", "second", etc., etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0035] See also Figures 1 to 11 As shown, the utility model provides a high-temperature resistant, pull-out and flip-over inspection door, comprising a door cover 1, a door frame 2, and a connecting rod mechanism 3. The connecting rod mechanism 3 comprises a first connecting rod assembly 4 which is hinged to the door cover 1 and assists the door cover 1 to be pulled out and flipped from the door frame 2, and a second connecting rod assembly 5 which connects the first connecting rod assembly 4 and the high-temperature equipment. In the utility model, the door frame 2 is fixedly mounted on the high-temperature equipment, which may be an exhaust chamber, a discharge box, a hot air furnace and other equipment. The door cover 1 is used to seal the door frame 2, and the connecting rod mechanism 3 is used to connect the door cover 1 and the high-temperature equipment to realize the pulling and flipping of the door cover 1. The inspection door is used for the inspection of high-temperature equipment. When it is closed daily, it has the function of isolating high temperature. After opening, it can be used to observe the internal structure of the equipment, or to enter the equipment for inspection.

[0036] The inspection door of the utility model has the following beneficial technical effects: the design of the first connecting rod assembly 4 and the second connecting rod assembly 5 increases the flexibility of opening or closing the door cover 1; when the door cover 1 needs to be opened, the first connecting rod assembly 4 rotates around the second connecting rod assembly 5 through the pin shaft, which makes it convenient to pull the door cover 1 out of the door frame 2; after the door cover 1 is separated from the door frame 2, due to the supporting effect of the second connecting rod assembly 5 and the rotation effect of the first hinge unit 6 and the second hinge unit 7, the door cover 1 can be easily flipped to the side to open a larger angle, and opening the door is effortless, which makes it convenient for maintenance personnel to enter the interior of the high-temperature equipment.

[0037] Preferably, as attached Figure 2As shown in the figure, the first link assembly 4 includes a first arc plate 41, a second arc plate 42, and a bending plate 43. One end of the bending plate 43 is fixedly connected to the first arc plate 41, and the other end is fixedly connected to the second arc plate 42. One end of the first arc plate 41 is connected to the door cover 1 through a first hinge unit 6, and one end of the second arc plate 42 is connected to the door cover 1 through a second hinge unit 7. The second link assembly 5 includes a first connecting plate 51, a second connecting plate 52, and an angle steel component 53. One end of the angle steel component 53 is fixedly connected to the first connecting plate 51, and the other end is fixedly connected to the second connecting plate 52. One end of the first connecting plate 51 is connected to the first arc plate 41 through a pin shaft and the other end is connected to the high-temperature equipment through a third hinge unit 8. One end of the second connecting plate 52 is connected to the second arc plate 42 through a pin shaft and the other end is connected to the high-temperature equipment through a fourth hinge unit 9. The design of the bending plate 43 can effectively strengthen the structural strength of the first link assembly 4. The first arc plate 41 and the second arc plate 42 are connected to the first connecting plate 51 and the second connecting plate 52 through pin shafts, increasing the length and mobility of the first arc plate 41 and the second arc plate 42, and ensuring that there is enough space for the door cover 1 to be completely pulled out from the door frame 2. The first arc plate 41 and the second arc plate 42 are hinged to the door cover 1 through hinge units, easily realizing a large-angle flip of the door cover 1.

[0038] Preferably, as shown in the attached Figure 3 figure, the bending plate 43 includes a first bending panel 431 and a second bending panel 432 arranged at an angle. The first arc plate 41 includes a first strip 411 and a second strip 412 arranged at an angle. The second arc plate 42 includes a third strip 421 and a fourth strip 422 arranged at an angle. One end of the first bending panel 431 is fixedly connected to the first strip 411, and the other end is fixedly connected to the third strip 421. One end of the second bending panel 432 is fixedly connected to the second strip 412, and the other end is fixedly connected to the fourth strip 422, further increasing the overall structural strength of the first link assembly 4. The end of the first strip 411 away from the second strip 412 is rotatably connected to the first hinge unit 6 through a pin shaft. The other end of the second strip 412 is rotatably connected to the first connecting plate 51 through a pin shaft. The end of the third strip 421 away from the fourth strip 422 is rotatably connected to the second hinge unit 7 through a pin shaft. The other end of the fourth strip 422 is rotatably connected to the second connecting plate 52 through a pin shaft, further increasing the connection flexibility between the first link assembly 4 and the door cover 1 and facilitating the rotation of the door cover 1. When opening and pulling out, the second strip 412 rotates around the first connecting plate 51 through a pin shaft, and the fourth strip 422 rotates around the second connecting plate 52 through a pin shaft. When the door cover 1 is completely pulled out, as shown in the attached Figure 10 figure, the second strip 412 and the first connecting plate 51 are in a straight line, and the fourth strip 422 and the second connecting plate 52 are in a straight line.

[0039] Preferably, in order to facilitate the pulling and flipping of the first link assembly 4, the included angle between the first bent panel 431 and the second bent panel 432 is 80-100°, the included angle between the first strip 411 and the second strip 412 is 80-100°, and the included angle between the third strip 421 and the fourth strip 422 is 80-100°.

[0040] Preferably, in order to further facilitate the pulling and flipping of the first link assembly 4, the included angle between the first bent panel 431 and the second bent panel 432 is 90°, the included angle between the first strip 411 and the second strip 412 is 90°, and the included angle between the third strip 421 and the fourth strip 422 is 90°.

[0041] Preferably, as shown in the appendix Figure 4 As shown, the angle steel component 53 includes a first angle steel plate component 531 and a second angle steel plate component 532. The first angle steel plate component 531 includes a first horizontal plate 5311 and a first vertical plate 5312 that are perpendicularly connected to each other. The second angle steel plate component 532 includes a second horizontal plate 5321 and a second vertical plate 5322 that are perpendicularly connected to each other. The first horizontal plate 5311 and the second horizontal plate 5321 are parallel and spaced apart, and the first vertical plate 5312 and the second vertical plate 5322 are parallel and spaced apart. By designing the first horizontal plate 5311 and the second horizontal plate 5321 to be parallel and spaced apart, and the first vertical plate 5312 and the second vertical plate 5322 to be parallel and spaced apart, the connection points between the angle steel component 53 and the first connecting plate 51 and the second connecting plate 52 can be effectively dispersed, ensuring the overall structural strength of the second link assembly 5 while reducing the material used for the angle steel component 53 and saving costs.

[0042] Preferably, as shown in the appendix Figure 5 As shown, the first hinge unit 6 includes a first bottom plate 61, a first hinge plate 62, and a second hinge plate 63. The first bottom plate 61 is fixedly installed on the door cover 1. The first hinge plate 62 and the second hinge plate 63 are oppositely arranged and perpendicular to the first bottom plate 61. The pin shaft connecting the first strip 411 is rotatably connected between the first hinge plate 62 and the second hinge plate 63; the structure of the second hinge unit 7 is the same as that of the first hinge unit 6. As shown in the appendix Figure 3 As shown, the third hinge unit 8 includes a second bottom plate 81, a third hinge plate 82, a fourth hinge plate 83, a pin shaft 84, and a nut 85. The second bottom plate 81 is fixedly installed on the high-temperature equipment. The third hinge plate 82 and the fourth hinge plate 83 are oppositely arranged and perpendicular to the second bottom plate 81. The pin shaft 84 passes through the third hinge plate 82, the first connecting plate 51, and the fourth hinge plate 83 in sequence and is locked and fixed with the nut 85; the structure of the fourth hinge unit 9 is the same as that of the third hinge unit 8.

[0043] Preferably, as shown in the appendixFigure 6 As shown, the door cover 1 includes a square inner frame 11, and the square inner frame 11 is embedded with ceramic fiber wool 12. Ceramic fiber wool is a highly efficient thermal insulation material, which has the advantages of light weight, high strength, oxidation resistance, low thermal conductivity, good softness, corrosion resistance, fire resistance and sound insulation.

[0044] Preferably, the thickness of the ceramic fiber wool 12 is 140-160 mm, preferably 150 mm, to ensure the high temperature resistance and heat insulation performance of the ceramic fiber wool 12 .

[0045] Preferably, as attached Figure 7 As shown, any side of the square inner frame 11 is provided with a first extension plate 13 extending outward, the end of the first extension plate 13 is provided with a second extension plate 14 facing the door frame 2, the first extension plate 13 is provided with a high temperature resistant sealing strip 15 on the side facing the door frame 2, the square inner frame 11, the first extension plate 13, and the second extension plate 14 are surrounded to form a clearance groove 16 for the door frame 2 to be inserted; the door frame 2 is a square door frame, and the square inner frame 11 is matched with the square door frame 2 when the inspection door is closed. The design of the clearance groove 16 and the high temperature resistant sealing strip 15 achieves a good sealing and heat insulation effect.

[0046] Preferably, as attached Figure 8 As shown, the inspection door also includes a plurality of clamping units 10 for clamping the door cover 1, and the clamping unit 10 includes an extended pressure plate 101, a clamping seat 102, a hinge bolt 103, a tapered handle 104, and a clamping pin 105; the extended pressure plate 101 is fixedly mounted on the door cover 1 and extends outward, and the end of the extended pressure plate 101 forms a slot 106 for the hinge bolt 103 to be inserted into, the clamping seat 102 is fixedly mounted on the high-temperature equipment, the clamping pin 105 passes through the hinge bolt 103 and is rotatably connected to the clamping seat 102 at both ends, and the tapered handle 104 is threadedly connected to the hinge bolt 103. The inspection door is in a closed state during daily use, with the extended pressure plate 101 and the swing bolt 103 working together to press the door cover 1. When inspection is required, the conical handle 104 on the swing bolt 103 is first loosened, and then the swing bolt 103 is pulled out of the slot 106 by manpower.

[0047] Preferably, it also includes a cotter pin 107 that passes through the clamping pin 105 and is used to stably connect the clamping pin 105 to the clamping seat 102 .

[0048] Preferably, the number of the pressing units 10 is four, and the four pressing units 10 are distributed in pairs on both sides of the door cover 1, so as to further improve the pressing effect on the door cover 1.

[0049] Preferably, a handle 17 is installed on the surface of the door cover 1.

[0050] The inspection door of the present utility model is made of pure machinery, with low production cost.

[0051] Although the specific embodiments of the present utility model have been described above, those skilled in the art of this technology should understand that the specific embodiments we described are illustrative rather than used to limit the scope of the present utility model. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present utility model should all be covered by the scope protected by the claims of the present utility model.

Claims

1. A high temperature resistant, pull-out and flip-over inspection door, comprising a door cover and a door frame, characterized in that: It also includes a connecting rod mechanism; the connecting rod mechanism includes a first connecting rod assembly that is hinged to the door cover and assists the door cover to be pulled out and flipped from the door frame, and a second connecting rod assembly that connects the first connecting rod assembly and the high-temperature equipment.

2. The high temperature resistant drawable and flippable inspection door according to claim 1, characterized in that: The first connecting rod assembly includes a first arc plate, a second arc plate, and a bending plate, wherein one end of the bending plate is fixedly connected to the first arc plate, and the other end is fixedly connected to the second arc plate; one end of the first arc plate is connected to the door cover through a first hinge unit, and one end of the second arc plate is connected to the door cover through a second hinge unit; The second connecting rod assembly includes a first connecting plate, a second connecting plate, and an angle steel component; one end of the angle steel component is fixedly connected to the first connecting plate, and the other end is fixedly connected to the second connecting plate; one end of the first connecting plate is connected to the first arc plate through a pin shaft, and the other end is connected to the high-temperature equipment through a third hinge unit; one end of the second connecting plate is connected to the second arc plate through a pin shaft, and the other end is connected to the high-temperature equipment through a fourth hinge unit.

3. The high temperature resistant drawable and flippable inspection door according to claim 2, characterized in that: The bending plate comprises a first bending panel and a second bending panel arranged at an angle, the first curved plate comprises a first plate strip and a second plate strip arranged at an angle, and the second curved plate comprises a third plate strip and a fourth plate strip arranged at an angle; One end of the first bent panel is fixedly connected to the first slat, and the other end is fixedly connected to the third slat; one end of the second bent panel is fixedly connected to the second slat, and the other end is fixedly connected to the fourth slat; one end of the first slat away from the second slat is rotatably connected to the first hinge unit via a pin shaft, and the other end of the second slat is rotatably connected to the first connecting plate via a pin shaft, and the end of the third slat away from the fourth slat is rotatably connected to the second hinge unit via a pin shaft, and the other end of the fourth slat is rotatably connected to the second connecting plate via a pin shaft.

4. The high temperature resistant drawable and flippable inspection door according to claim 3, characterized in that: The angle between the first bent panel and the second bent panel is 80-100°, the angle between the first slat and the second slat is 80-100°, and the angle between the third slat and the fourth slat is 80-100°.

5. The high temperature resistant drawable and flippable inspection door according to any one of claims 2 to 4, characterized in that: The angle steel component includes a first angle steel plate and a second angle steel plate. The first angle steel plate includes a first transverse plate and a first vertical plate vertically connected to each other. The second angle steel plate includes a second transverse plate and a second vertical plate vertically connected to each other. The first transverse plate is parallel to the second transverse plate and is spaced apart from each other. The first vertical plate and the second vertical plate are parallel to each other and are spaced apart from each other.

6. The high temperature resistant drawable and flippable inspection door according to claim 5, characterized in that: The first hinge unit includes a first base plate, a first hinge plate, and a second hinge plate. The first base plate is fixedly installed on the door cover. The first hinge plate and the second hinge plate are arranged opposite to each other and are both perpendicular to the first base plate. The pin connecting the first slat is rotatably connected between the first hinge plate and the second hinge plate. The structure of the second hinge unit is the same as that of the first hinge unit.

7. The high temperature resistant drawable and flippable inspection door according to any one of claims 1 to 4 and 6, characterized in that: The door cover comprises a square inner frame, in which ceramic fiber wool with a thickness of 140-160 mm is embedded.

8. The high temperature resistant drawable and flippable inspection door according to claim 7, characterized in that: A first extension plate is extended outwardly on any side of the square inner frame, a second extension plate is provided at the end of the first extension plate facing the door frame, a high-temperature resistant sealing strip is provided on the side of the first extension plate facing the door frame, and the square inner frame, the first extension plate and the second extension plate are arranged to form a clearance groove for inserting the door frame; the door frame is a square door frame, and the square inner frame is matched with the square door frame when the inspection door is closed.

9. The high temperature resistant drawable and flippable inspection door according to claim 8, characterized in that: The inspection door also includes a plurality of clamping units for clamping the door cover, and the clamping units include an extended pressure plate, a clamping seat, a hinge bolt, a conical handle, and a pin shaft; the extended pressure plate is fixedly installed on the door cover and extends outward, and the end of the extended pressure plate forms a slot for the hinge bolt to be inserted into, the clamping seat is fixedly installed on the high-temperature equipment, the pin shaft passes through the hinge bolt and has both ends rotatably connected to the clamping seat, and the conical handle is threadedly connected to the hinge bolt.

10. The high temperature resistant drawable and flippable inspection door according to claim 9, characterized in that: A handle is installed on the surface of the door cover.

Images