A fire door

Abstract

The application belongs to the technical field of heat insulation, and particularly relates to a heat-insulating fireproof door, which comprises a door frame, a door plate rotatably arranged in the door frame, wherein the door plate and the door frame are both galvanized steel plates, one side of the door plate is provided with a sealing element, the sealing element comprises a fixed frame fixed to the door frame, a second groove is formed on one side of the fixed frame, a plurality of springs are fixedly arranged in the second groove, one end of each of the springs away from the second groove is fixedly connected with a same top block, a top groove is formed on the surface of the door plate, the position of the top groove corresponds to the position of the top block, two positioning grooves are formed in the fixed frame, and a condenser pipe is clamped in each of the two positioning grooves. The heat-insulating fireproof door solves the problem that the rotating part of the traditional heat-insulating door cannot be sealed, heat will leak out along the rotating part of the heat-insulating door plate and the door frame, and the rotating part is difficult to be completely sealed, even if sealing rubber strips are used, there are still gaps, heat will be transferred along the gaps, and the heat-insulating effect is affected.

Description

Technical Field

[0001] This invention belongs to the field of thermal insulation technology, specifically a thermally insulated fire door. Background Technology

[0002] Fire doors need to meet requirements such as fire resistance stability, integrity, and heat insulation for a certain period of time. They are fire-resistant partitions with a certain degree of fire resistance, installed in fire compartments, evacuation stairwells, vertical shafts, etc. In addition to the functions of ordinary doors, fire doors also have the function of preventing the spread of fire and smoke. They can stop the spread of fire for a certain period of time and ensure the evacuation of personnel.

[0003] The above-mentioned solution still has some problems in practical application. When the door frame and the door panel of the existing traditional door insulation are assembled together, there is a rotating shaft at the rotation point of the door insulation panel. The door insulation panel can only be opened by rotating the rotating shaft so that it can be closed normally. However, the rotating part cannot be sealed, and heat will leak out along the rotation point between the door insulation panel and the door frame. Moreover, it is difficult to completely seal this part. Even if sealing strips are used, there are still gaps, which will cause heat to be transferred along the gaps, affecting the heat insulation effect.

[0004] Therefore, the present invention provides a heat-insulating fireproof door. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: the present invention provides a heat-insulating fireproof door, including a door frame, a door panel is rotatably arranged inside the door frame, both the door panel and the door frame are galvanized steel plates, a sealing element is provided on one side of the door panel, and the sealing element includes a fixed frame fixed to the door frame.

[0007] A second groove is formed on one side of the fixed frame, and a number of springs are fixedly connected in the second groove. The ends of the springs away from the second groove are fixedly connected to the same top block.

[0008] A top groove is formed on the surface of the door panel, and the position of the top groove corresponds to that of the top block.

[0009] Preferably, the fixed frame has two positioning grooves inside, and a condenser tube is engaged in each of the two positioning grooves. The fixed frame is fixed with several limiting blocks at the positions corresponding to the positioning grooves, and the condenser tube is engaged in the fixed frame by the several limiting blocks.

[0010] Preferably, two first grooves are provided on one side of the door panel, and several compression springs are fixedly connected in each first groove. The ends of the compression springs away from the first grooves are fixedly connected to the same protrusion. The door frame has a slot corresponding to the position of the protrusion, and the protrusion can be inserted into the slot.

[0011] Preferably, each compression spring is provided with a telescopic post, and both ends of each telescopic post are fixedly connected to the protrusion and the door panel.

[0012] Preferably, two rubber strips are fixed to the side of the door panel near the protrusion, and the rubber strips fit into the door frame.

[0013] Preferably, two sets of agitation components are fixedly connected inside the door panel, and each set of agitation components includes a first cavity opened inside the door panel;

[0014] A water tank is fixedly connected to each of the first cavities, and a connecting pipe is fixedly connected to one side of each water tank. A piston cylinder is fixedly connected to the end of each connecting pipe away from the water tank.

[0015] A piston rod is slidably connected inside each piston cylinder, and the ends of the two piston rods away from the piston cylinders are fixed to the same slider.

[0016] Preferably, both sides of the slider are fixedly connected to a sliding plate, and the first cavity is provided with a groove corresponding to the position of each sliding plate, so that the slider can slide along the groove via the two sliding plates.

[0017] Preferably, a rotating shaft is fixedly connected to one side of the door frame, the door panel is sleeved on the rotating shaft, a second bevel gear is fixedly connected to the circumferential surface of the rotating shaft, a limiting groove is formed on the circumferential surface of the rotating shaft, a limiting ring is rotatably connected in the limiting groove, a fixing rod is fixedly connected to the circumferential surface of the limiting ring, a first bevel gear is rotatably connected to the end of the fixing rod away from the limiting ring, the first bevel gear meshes with the second bevel gear, a reciprocating screw is fixedly connected to the side of the first bevel gear away from the fixing rod, and a slider is threadedly connected to the circumferential surface of the reciprocating screw.

[0018] Preferably, each water tank has a threaded sealing cap on one side, and the sealing cap is exposed outside the door panel. Each water tank has a protective plate fixed to both sides, and the protective plate is a thermally conductive silicone pad.

[0019] Preferably, a fixing plate is fixedly connected to the circumferential surface of each piston cylinder, and the fixing plate is fixedly connected to the door panel.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. The heat-insulating fireproof door of the present invention forms a sealed cavity at the rotating part of the door panel by inserting the top block and the top groove, preventing heat leakage in this part and achieving more convenient and automatic sealing; it solves the problem that in traditional heat-insulating doors, the rotating part cannot be sealed, and heat will leak out along the rotating part between the heat-insulating door panel and the door frame. Moreover, it is difficult to completely seal this part. Even if sealing strips are used, there are still gaps, which cause heat to be transferred along the gaps and affect the heat insulation effect.

[0022] 2. The heat-insulating fire door of the present invention, after the fixed frame is closed, if heat is dissipated along the rotation of the door panel, it will dissipate into the internal cavity of the fixed frame. Then, by inserting two condenser pipes into the fixed frame, the cooling liquid in the condenser pipes will directly absorb the heat dissipated into the fixed frame, thereby achieving the effect of controlling heat dissipation and making the heat-insulating door achieve a better heat insulation effect.

[0023] 3. The heat-insulating fireproof door of the present invention uses a sliding slider to drive the piston rods at both ends of the slider to squeeze into the piston cylinder. The coolant in the piston cylinder is then squeezed into the water tank through the connecting pipe, thereby disturbing the coolant in the water tank and causing heat exchange. Because some parts of the door may be hot spots during the heat insulation process, resulting in higher heat conduction in these parts and slower diffusion to other coolant levels, the cooperation of the piston rod and piston cylinder mixes the coolant in the water tank, causing the coolant to mix and thus lowering the temperature of the coolant in the hot spots. This allows for better heat absorption and improves the heat insulation effect of the door. Attached Figure Description

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] Figure 1 This is a perspective view of Embodiment 1 of the present invention;

[0026] Figure 2 This is a front view of the main body of the invention;

[0027] Figure 3 This is a rear view of the main body of the invention;

[0028] Figure 4 This is a schematic diagram of the structure of the fixing frame of the present invention;

[0029] Figure 5 This is a schematic diagram of the split structure of the fixing frame of the present invention;

[0030] Figure 6 This is a schematic diagram of the door panel structure of the present invention;

[0031] Figure 7This is a schematic diagram of the protrusion structure of the present invention;

[0032] Figure 8 This is a schematic diagram of the internal structure of the door panel of the present invention;

[0033] Figure 9 This is a schematic diagram of the reciprocating screw of the present invention;

[0034] Figure 10 This is a schematic diagram of the structure of the first bevel gear of the present invention;

[0035] Figure 11 This is a cross-sectional view of the door panel of the present invention;

[0036] In the diagram: 1. Door frame; 11. Door panel; 12. First groove; 13. Protrusion; 14. Compression spring; 15. Telescopic column; 16. Rubber strip; 17. Rotating shaft;

[0037] 18. Slider; 181. Slide plate; 182. Slide groove; 183. First cavity;

[0038] 19. Reciprocating screw; 110. Piston rod; 111. Piston cylinder; 112. Connecting pipe; 113. Water tank; 114. Protective plate; 115. Sealing cover; 116. Fixing plate;

[0039] 171. First bevel gear; 172. Limiting groove; 173. Limiting ring; 174. Second bevel gear; 175. Fixing rod;

[0040] 2. Fixing frame; 21. Condenser tube; 22. Limiting block; 23. Top block; 24. Positioning groove; 25. Second groove; 26. Spring; 27. Top groove. Detailed Implementation

[0041] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments. Example

[0042] like Figures 1 to 11 As shown in the figure, an insulated fireproof door according to an embodiment of the present invention includes a door frame 1, a door panel 11 rotatably disposed inside the door frame 1, both the door panel 11 and the door frame 1 are galvanized steel plates, a sealing element is provided on one side of the door panel 11, the sealing element includes a fixed frame 2 fixedly connected to the door frame 1; a second groove 25 opened on one side of the fixed frame 2, a plurality of springs 26 fixedly connected in the second groove 25, and a common top block 23 fixedly connected to one end of the plurality of springs 26 away from the second groove 25; and a top groove 27 opened on the surface of the door panel 11, the position of the top groove 27 corresponding to the top block 23.

[0043] Specifically, in the existing traditional insulated door frame 1 and insulated door panel 11, after they are assembled together, there is a rotating shaft 17 at the rotating part of the insulated door panel 11. The insulated door panel 11 can only be opened by rotating the rotating shaft 17 so as to perform normal door closing work. However, the rotating part cannot be sealed, and heat will leak out along the rotating part between the insulated door panel 11 and the door frame 1. Moreover, it is difficult to completely seal this part. Even if sealing strips are used, there are still gaps, which will cause heat to be transferred along the gaps and affect the heat insulation effect.

[0044] Therefore, this invention further seals and insulates the rotating part of the door panel 11 by setting a sealing element. First, the door panel 11 is rotated to integrate with the door frame 1. When the door panel 11 is closed, the top block 23 in the fixed frame 2 fixed to the door frame 1 is released. Since the inner wall of the second groove 25 of the fixed frame 2 is provided with an electrophoretic magnetic block, and the top block 23 is a magnetic block, the electrophoretic magnetic block is de-energized at the moment the door panel 11 is closed. At this time, the top block 23 is released and inserted into the top groove 27 on the door panel 11. Through the insertion of the top block 23 and the top groove 27, a sealed cavity is specially formed at the rotating part of the door panel 11 to prevent heat leakage in this part, thus achieving a more convenient and automatic sealing.

[0045] This solves the problem that in traditional insulation doors, the rotating parts cannot be sealed, causing heat to leak out along the rotating part between the insulation door panel 11 and the door frame 1. Furthermore, it is difficult to completely seal this part, and even with sealing strips, gaps still exist, causing heat to be transferred along the gaps and affecting the heat insulation effect.

[0046] like Figure 4 and Figure 5 As shown, in this embodiment, the fixed frame 2 has two positioning grooves 24 inside, and a condenser tube 21 is snapped into each of the two positioning grooves 24. Several limiting blocks 22 are fixed to the fixed frame 2 at the positions corresponding to the positioning grooves 24, and the condenser tube 21 is snapped into the fixed frame 2 through the several limiting blocks 22.

[0047] Specifically, after the fixed frame 2 is closed, if heat is dissipated along the rotation of the door panel 11, it will dissipate into the internal cavity of the fixed frame 2. Then, by inserting two condenser pipes 21 into the fixed frame 2, the cooling liquid in the condenser pipes 21 will directly absorb the heat dissipated into the fixed frame 2. Because the cooling liquid in the condenser pipes 21 has a low temperature and the heat dissipated has a high temperature, heat exchange will occur, thereby achieving the effect of controlling heat dissipation and making the insulated door achieve a better heat insulation effect.

[0048] like Figure 5As shown, in this embodiment, two first grooves 12 are provided on one side of the door panel 11. Several compression springs 14 are fixedly connected in each first groove 12. The ends of the compression springs 14 away from the first groove 12 are fixedly connected to the same protrusion 13. The door frame 1 has a slot corresponding to the position of the protrusion 13, and the protrusion 13 can be inserted into the slot.

[0049] Specifically, after the door panel 11 and the door frame 1 are integrated, a first groove 12 is provided on the side of the door panel 11 away from the rotation point, and a protrusion 13 is elastically provided in the first groove 12. When the door panel 11 is closed, the protrusion 13 will be relatively squeezed along the side of the chamfer of the door frame 1, thereby squeezing several compression springs 14 on one side of the protrusion 13, causing the protrusion 13 to retract into the first groove 12. Then, when the door panel 11 and the door frame 1 are aligned, the protrusion 13 will be inserted into the corresponding slot on the door panel 11, thereby better sealing the side of the door panel 11 and the door frame 1 where the door lock is provided, achieving a better blocking effect for heat dissipation, and thus improving the heat insulation effect of the door.

[0050] like Figure 6 and Figure 7 As shown, in this embodiment, each compression spring 14 is provided with a telescopic post 15, and both ends of each telescopic post 15 are fixedly connected to the protrusion 13 and the door panel 11.

[0051] Specifically, by providing a telescopic post 15 in each compression spring 14, when the protrusion 13 presses the compression spring 14, it will press the telescopic post 15, thereby supporting the compression spring 14. This allows the compression spring 14 to deform longitudinally and not laterally, enabling the protrusion 13 to be inserted into the slot more stably and extending the service life of the compression spring 14.

[0052] like Figure 6 As shown, in this embodiment, two rubber strips 16 are fixedly connected to the side of the door panel 11 near the protrusion 13, and the rubber strips 16 fit into the door frame 1.

[0053] Specifically, by having two rubber strips 16 on the door panel 11 near the door lock, the heat insulation effect of the door panel 11 is further improved by the tight fit between the rubber strips 16 and the door frame 1 after the door panel 11 is closed, and the sealing performance of the door panel 11 is further enhanced. Example

[0054] like Figures 2 to 11As shown in the comparative embodiment one, another embodiment of the present invention is as follows: two sets of agitation components are fixedly connected inside the door panel 11, each set of agitation components includes a first cavity 183 opened in the door panel 11; a water tank 113 is fixedly connected in each first cavity 183, a connecting pipe 112 is fixedly connected to one side of each water tank 113, and a piston cylinder 111 is fixedly connected to one end of each connecting pipe 112 away from the water tank 113; a piston rod 110 is slidably connected in each piston cylinder 111, and the same slider 18 is fixedly connected to one end of the two piston rods 110 away from the piston cylinder 111.

[0055] Specifically, during the use of the insulated door, the sliding block 18 can be pulled, thereby causing the piston rods 110 at both ends of the sliding block 18 to be squeezed into the piston cylinder 111. The coolant in the piston cylinder 111 is then squeezed into the water tank 113 along the connecting pipe 112, thereby disturbing the coolant in the water tank 113 and causing heat exchange. Because some parts of the insulated door may be hot spots during the insulation process, resulting in higher heat conduction in these parts and slower diffusion to other coolant levels, the cooperation of the piston rods 110 and piston cylinders 111 mixes the coolant in the water tank 113, causing the coolant to mix and thus lowering the temperature of the coolant in the hot spots. This allows for better heat absorption and improves the insulation effect of the insulated door.

[0056] like Figures 8 to 11 As shown, in this embodiment, slide plates 181 are fixed to both sides of the slider 18. The first cavity 183 is provided with a groove 182 corresponding to the position of each slide plate 181. The slider 18 can slide along the groove 182 through the two slide plates 181.

[0057] Specifically, during the sliding process of slider 18, in order to make the sliding of slider 18 more stable, slide plates 181 are fixed to both sides of slider 18, and grooves 182 are opened on the inner wall of the first cavity 183 of door panel 11. During the sliding process of slider 18, due to the limiting of slide plates 181 sliding along grooves 182, slider 18 can more stably drive the two piston rods 110 to squeeze piston cylinder 111, thereby achieving the effect of stabilizing the disturbance of coolant.

[0058] like Figures 8 to 10As shown, in this embodiment, a rotating shaft 17 is fixedly connected to one side of the door frame 1, and the door panel 11 is sleeved on the rotating shaft 17. A second bevel gear 174 is fixedly connected to the circumferential surface of the rotating shaft 17. A limiting groove 172 is opened on the circumferential surface of the rotating shaft 17. A limiting ring 173 is rotatably connected in the limiting groove 172. A fixing rod 175 is fixedly connected to the circumferential surface of the limiting ring 173. A first bevel gear 171 is rotatably connected to the end of the fixing rod 175 away from the limiting ring 173. The first bevel gear 171 meshes with the second bevel gear 174. A reciprocating screw 19 is fixedly connected to the side of the first bevel gear 171 away from the fixing rod 175. A slider 18 is threadedly connected to the circumferential surface of the reciprocating screw 19.

[0059] Specifically, during the rotation of the door panel 11, since the rotating shaft 17 is fixed, the door panel 11 rotates around the rotating shaft 17. During the rotation of the door panel 11, the meshing of the first bevel gear 171 and the second bevel gear 174, with the first bevel gear 171 being smaller and the second bevel gear 174 being larger, allows the first bevel gear 171 to rotate around the second bevel gear 174. Then, the first bevel gear 171 drives the reciprocating screw 19 to rotate. The rotation of the reciprocating screw 19 drives the threaded slider 18 to slide on the reciprocating screw 19. This allows the coolant in the water tank 113 to be disturbed and mixed while the door is being opened and closed, achieving a better heat insulation effect.

[0060] like Figure 8 As shown, in this embodiment, each water tank 113 has a sealing cover 115 threadedly connected to one side, and the sealing cover 115 is exposed outside the door panel 11. Each water tank 113 has a protective plate 114 fixed to both sides, and the protective plate 114 is a thermally conductive silicone pad.

[0061] Specifically, when the coolant in the water tank 113 has been used for a long time, the corrosion inhibitors and anti-corrosion additives in the coolant will gradually degrade with the increase of usage time and temperature. Therefore, the coolant needs to be replaced. At this time, the coolant in the water tank 113 is extracted by turning the sealing cap 115, then flushed, and then new coolant is injected, so that the insulation door can achieve a longer service life.

[0062] like Figure 9 As shown, in this embodiment, a fixing plate 116 is fixedly connected to the circumferential surface of each piston cylinder 111, and the fixing plate 116 is fixedly connected to the door panel 11.

[0063] Specifically, by fixing a fixing plate 116 to the circumferential surface of each piston cylinder 111, and then fixing the fixing plate 116 to the door plate 11, the piston cylinder 111 can work more stably.

[0064] Working principle: First, rotate the door panel 11 to integrate it with the door frame 1. After the door panel 11 and the door frame 1 are integrated, a first groove 12 is formed on the side of the door panel 11 away from the rotation point. Then, a protrusion 13 is elastically arranged in the first groove 12. When the door panel 11 is closed, the protrusion 13 will be relatively pressed along the chamfered side of the door frame 1, thereby pressing several compression springs 14 on one side of the protrusion 13, causing the protrusion 13 to retract into the first groove 12. Then, when the door panel 11 is aligned with the door frame 1, the protrusion 13 will be inserted into the corresponding slot on the door panel 11, thus locking the side of the door panel 11 and the door frame 1 where the door lock is located. A better seal is achieved, which better blocks heat loss and improves the heat insulation effect of the door. At the same time, the top block 23 in the fixed frame 2 fixed to the door frame 1 will be released. Since the inner wall of the second groove 25 of the fixed frame 2 is provided with an electrophoretic magnetic block, and the top block 23 is a magnetic block, the electrophoretic magnetic block is de-energized the moment the door panel 11 is closed. At this time, the top block 23 will be released and inserted into the top groove 27 on the door panel 11. Through the insertion of the top block 23 and the top groove 27, a sealed cavity is specially formed at the rotating part of the door panel 11 to prevent heat leakage in this part, thus achieving a more convenient and automatic sealing.

[0065] After the fixed frame 2 is closed, if heat is dissipated along the rotation of the door panel 11, it will dissipate into the internal cavity of the fixed frame 2. Then, by inserting two condenser pipes 21 into the fixed frame 2, the cooling liquid in the condenser pipes 21 will directly absorb the heat dissipated into the fixed frame 2, thereby achieving the effect of controlling heat dissipation and making the insulated door achieve a better heat insulation effect.

[0066] Meanwhile, during the rotation of the door panel 11, since the rotating shaft 17 is fixed, the door panel 11 rotates around the rotating shaft 17. During the rotation of the door panel 11, the meshing of the first bevel gear 171 and the second bevel gear 174, with the first bevel gear 171 being smaller and the second bevel gear 174 being larger, allows the first bevel gear 171 to rotate around the second bevel gear 174. Then, the first bevel gear 171 drives the reciprocating screw 19 to rotate. The rotation of the reciprocating screw 19 drives the threaded slider 18 to slide on the reciprocating screw 19. This allows the coolant in the water tank 113 to be disturbed and mixed while the door is being opened and closed, achieving a better heat insulation effect.

[0067] Then, after the coolant in the water tank 113 has been used for a long time, the corrosion inhibitors and anti-corrosion additives in the coolant will gradually degrade with the increase of usage time and temperature. Therefore, the coolant needs to be replaced. At this time, the coolant in the water tank 113 is extracted by turning the sealing cap 115, then flushed, and then new coolant is injected, so that the insulation door can achieve a longer service life.

[0068] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thermally insulated fire door, characterized in that: Includes a door frame (1), and a door panel (11) is rotatably provided inside the door frame (1). Both the door panel (11) and the door frame (1) are galvanized steel plates. A sealing element is provided on one side of the door panel (11). The sealing element includes a fixed frame (2) fixed to the door frame (1). A second groove (25) is opened on one side of the fixed frame (2), and a number of springs (26) are fixedly connected in the second groove (25). The ends of the springs (26) away from the second groove (25) are fixedly connected to the same top block (23). A top groove (27) is formed on the surface of the door panel (11), the position of which corresponds to the top block (23); The fixed frame (2) has two positioning slots (24) inside, and a condenser tube (21) is snapped into each of the two positioning slots (24). The fixed frame (2) is fixed with several limiting blocks (22) at the positions corresponding to the positioning slots (24). The condenser tube (21) is snapped into the fixed frame (2) by several limiting blocks (22). Two first grooves (12) are provided on one side of the door panel (11). Several compression springs (14) are fixedly connected in each first groove (12). The ends of the compression springs (14) away from the first groove (12) are fixedly connected to the same protrusion (13). The door frame (1) is provided with a slot corresponding to the position of the protrusion (13). The protrusion (13) can be inserted into the slot. Two sets of agitation components are fixedly connected inside the door panel (11), and each set of agitation components includes a first cavity (183) opened inside the door panel (11). A water tank (113) is fixedly connected in each first cavity (183), and a connecting pipe (112) is fixedly connected to one side of each water tank (113), and a piston cylinder (111) is fixedly connected to one end of each connecting pipe (112) away from the water tank (113). A piston rod (110) is slidably connected inside each piston cylinder (111), and the ends of the two piston rods (110) away from the piston cylinder (111) are fixed to the same slider (18).

2. A fire door according to claim 1, wherein: Each of the compression springs (14) is provided with a telescopic post (15), and both ends of each telescopic post (15) are fixedly connected to the protrusion (13) and the door panel (11).

3. A fire door according to claim 1, wherein: Two rubber strips (16) are fixed to the side of the door panel (11) near the protrusion (13), and the rubber strips (16) fit into the door frame (1).

4. The fire door of claim 1, wherein: The slider (18) has a sliding plate (181) fixed to both sides. The first cavity (183) has a groove (182) corresponding to the position of each sliding plate (181). The slider (18) can slide along the groove (182) through the two sliding plates (181).

5. The fire door of claim 1, wherein: A rotating shaft (17) is fixedly connected to one side of the door frame (1). The door panel (11) is sleeved on the rotating shaft (17). A second bevel gear (174) is fixedly connected to the circumferential surface of the rotating shaft (17). A limiting groove (172) is opened on the circumferential surface of the rotating shaft (17). A limiting ring (173) is rotatably connected in the limiting groove (172). A fixing rod (175) is fixedly connected to the circumferential surface of the limiting ring (173). A first bevel gear (171) is rotatably connected to the end of the fixing rod (175) away from the limiting ring (173). The first bevel gear (171) meshes with the second bevel gear (174). A reciprocating screw (19) is fixedly connected to the side of the first bevel gear (171) away from the fixing rod (175). A slider (18) is threadedly connected to the circumferential surface of the reciprocating screw (19).

6. A heat-insulating fireproof door according to claim 1, characterized in that: Each of the water tanks (113) has a sealing cap (115) threaded on one side, and the sealing cap (115) is exposed outside the door panel (11). Each of the water tanks (113) has a protective plate (114) fixed on both sides, and the protective plate (114) is a thermally conductive silicone pad.

7. A heat-insulating fireproof door according to claim 1, characterized in that: Each piston cylinder (111) has a fixing plate (116) fixedly connected to its circumferential surface, and the fixing plate (116) is fixedly connected to the door panel (11).

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