Steel structure broken bridge ultra-low energy consumption passive door structure

Abstract

The invention provides a steel structure broken bridge ultra-low energy consumption passive door structure, and belongs to the technical field of passive doors. The steel structure broken bridge ultra-low energy consumption passive door structure comprises a door frame structure, the door frame structure comprises a first frame body structure, a second frame body structure and a first heat insulation strip, and the first frame body structure and the second frame body structure are separated through the first heat insulation strip so that a first partition cavity can be formed between the first frame body structure and the second frame body structure; the door leaf structure comprises a first door body structure, a second door body structure, a third door body structure and a second heat insulation strip, and the first door body structure and the second door body structure are separated through the second heat insulation strip so that the first door body structure and the second door body structure can form a second partition cavity; the first door body structure, the second door body structure and the second heat insulation strip are arranged on the side, close to the door frame structure, of the third door body structure.

Description

Technical Field

[0001] The invention belongs to the technical field of passive doors, in particular to a steel structure thermally-broken ultra-low energy consumption passive door structure. Background Art

[0002] At present, the current status of thermal insulation doors in the industry is that although the structure of aluminum alloy thermal insulation is relatively complete, it cannot fully meet the fire protection performance. The cost of aluminum alloy thermal insulation passive doors is relatively high, and the model size is relatively fixed. It is not convenient to produce different structural sizes according to market needs, and it is not widely used. However, the existing steel thermal insulation process does not form a real partition insulation cavity and cannot fully meet the thermal insulation requirements of thermal insulation. For example, the "A steel thermal insulation ultra-low energy consumption passive door structure" with patent number CN202323152143.8, in which the first structure and the second structure are separated by insulation strips, however, there are some problems. Part of the first structure extends into the second structure, and some heat is still introduced into the second structure through the first structure, thereby reducing the heat insulation effect. For example, the insulation strips are inconvenient to install and the intervals are small, resulting in less than ideal insulation effect. Summary of the invention

[0003] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose a steel structure thermal break ultra-low energy consumption passive door structure, which has the characteristics of effectively blocking heat transfer, the steel thermal break structure is processed by sheet metal, and the shape and size can be processed as needed.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] Steel structure broken bridge ultra-low energy consumption passive door structure, including:

[0006] A door frame structure, the door frame structure comprising a first frame structure, a second frame structure, and a first thermal insulation strip, the first frame structure and the second frame structure are separated by the first thermal insulation strip, so that a first partition cavity is formed between the first frame structure and the second frame structure;

[0007] A door leaf structure, the door leaf structure includes a first door body structure, a second door body structure, a third door body structure, and a second thermal insulation strip, the first door body structure and the second door body structure are separated by the second thermal insulation strip so that the first door body structure and the second door body structure form a second partition cavity; the first door body structure, the second door body structure, and the second thermal insulation strip are arranged on the side of the third door body structure close to the door frame structure.

[0008] The above-mentioned steel structure thermal break ultra-low energy consumption passive door structure also includes a first fixing plate, a second fixing plate, a plurality of first screws, and a plurality of second screws. The first frame structure has a first limiting groove, and the second frame structure has a second limiting groove. One side of the first thermal insulation strip is inserted into the second limiting groove, and the other side of the first thermal insulation strip is inserted into the second limiting groove. The first thermal insulation strip has a first thermal insulation channel. The first thermal insulation channel has two first limiting parts and two second limiting parts that are symmetrically arranged along its length direction. The two first limiting parts and the inner wall of the first thermal insulation strip form two first slots, and the two ends of the first fixing plate are respectively inserted into the two first slots; the two second limiting parts and the other inner wall of the first thermal insulation strip form two second slots, and the two ends of the second fixing plate are respectively inserted into the two second slots; the first screw passes through the first frame structure, the first thermal insulation strip, and the first fixing plate, and the second screw passes through the second frame structure, the first thermal insulation strip, and the second fixing plate in sequence, so that the first frame structure, the second frame structure, and the first thermal insulation strip are fixedly connected.

[0009] In the above-mentioned steel structure thermal break ultra-low energy consumption passive door structure, it also includes a third fixing plate, a fourth fixing plate, a plurality of third screws, and a plurality of fourth screws. The first door body structure has a third limiting groove, and the second frame structure has a fourth limiting groove. One side of the second thermal insulation strip is inserted into the third limiting groove, and the other side of the second thermal insulation strip is inserted into the fourth limiting groove. The second thermal insulation strip has a second thermal insulation channel, and the second thermal insulation channel has two third limiting parts and two fourth limiting parts that are symmetrically arranged along its length direction. The two third limiting parts and the inner wall of the second thermal insulation strip form two third clamping grooves, and the two ends of the third fixing plate are respectively inserted into the two third clamping grooves; the two fourth limiting parts and the other inner wall of the second thermal insulation strip form two fourth clamping grooves, and the two ends of the fourth fixing plate are respectively inserted into the two fourth clamping grooves; the third screw passes through the first door body structure, the third sealing strip, and the third fixing plate, and the fourth screw passes through the second door body structure, the fourth sealing strip, and the fourth fixing plate in sequence, so that the first door body structure, the second door body structure, and the second thermal insulation strip are fixedly connected.

[0010] In the above-mentioned steel structure thermal break ultra-low energy consumption passive door structure, the first frame structure is composed of the first door frame inner panels and the first door frame outer panels, the second frame structure is composed of the second door frame inner panels and the second door frame outer panels, and the first door frame inner panels and the second door frame inner panels are connected by the first insulation strip.

[0011] In the above-mentioned steel structure thermal break ultra-low energy consumption passive door structure, the first door body structure is composed of the first door leaf outer panel and the first door leaf inner panel, the second door body structure is composed of the second door leaf outer panel and the second door leaf inner panel, and the first door leaf inner panel and the second door leaf inner panel are connected by a second insulation strip.

[0012] In the above-mentioned steel structure thermal break ultra-low energy consumption passive door structure, a first sealing strip is installed on the side of the first partition cavity, and a second sealing strip is installed on the side of the second partition cavity; the second frame structure has an installation groove, and a fireproof and heat-insulating sealing strip is installed in the installation groove, and the first frame structure has a limiting step; the first door body structure has a protrusion adapted to the limiting step, and a third sealing strip is installed on the protrusion. When the door leaf structure and the door frame structure are in a closed state, the second sealing strip abuts against the first sealing strip to form a seal, the third sealing strip abuts against the limiting step to form a seal, and the second door body structure abuts against the fireproof and heat-insulating sealing strip to form a seal.

[0013] In the above-mentioned steel structure thermal break ultra-low energy consumption passive door structure, the third door body structure includes a door leaf core, an inner decorative panel, and an outer decorative panel. The outer decorative panel is fixedly connected to the door leaf core, the first door body structure is fixedly connected to the door leaf core, the inner decorative panel is fixedly connected to the second door body structure, and a cavity is formed between the inner decorative panel and the door leaf core.

[0014] In the above-mentioned steel structure thermal break ultra-low energy consumption passive door structure, the first frame structure is filled with cement material, the second frame structure, the second door structure, and the cavity are filled with thermal insulation material, and the first door structure and the door leaf and door core are filled with fireproof insulation material.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The first partition cavity effectively blocks the heat conduction path in the door frame by separating the first frame structure from the second frame structure. When the heat is transferred from the outside to the inside or from the inside to the outside, it must cross the first partition cavity. The air in the partition cavity is relatively still and the heat conduction efficiency is low, which slows down the heat transfer speed. The second partition cavity separates the first door structure from the second door structure, and also breaks the direct conduction of heat in the door leaf. This means that when there is a temperature difference between indoors and outdoors, the heat needs to pass through the second partition cavity, a "buffer zone", and its transfer process is significantly delayed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram in this application;

[0018] Figure 2 It is a schematic diagram of a separated structure in this application.

[0019] In the figure,

[0020] 2. Door frame structure;

[0021] 21. First frame structure; 211. First limiting groove; 212. First door frame inner panel; 213. First door frame outer panel; 214. Limiting step;

[0022] 22. Second frame structure; 221. Second limiting groove; 222. Second door frame inner panel; 223. Second door frame outer panel; 224. Mounting groove;

[0023] 23. First heat insulation strip; 231. First heat insulation channel; 2311. First position limiting portion; 2312. Second position limiting portion; 2313. First card slot; 2314. Second card slot; 24. First partition cavity;

[0024] 3. Door leaf structure;

[0025] 31. First door structure; 311. Third limiting groove; 312. First door leaf outer panel; 313. First door leaf inner panel; 314. Protrusion;

[0026] 32. Second door structure; 321. Fourth limit groove; 322. Second door leaf outer panel; 323. Second door leaf inner panel;

[0027] 33. The third door structure; 331. Door leaf and door core; 332. Inner decorative panel; 333. Outer decorative panel; 334. Chamber;

[0028] 34, second heat insulation strip; 341, second heat insulation channel; 342, third limiting portion; 343, fourth limiting portion; 344, third slot; 345, fourth slot; 35, second partition cavity;

[0029] 4. The first fixing plate;

[0030] 5. Second fixing plate;

[0031] 6. First screw;

[0032] 7. Second screw;

[0033] 8. The third fixing plate;

[0034] 9. Fourth fixing plate;

[0035] 10. The third screw;

[0036] 11. The fourth screw;

[0037] 12. The first sealing strip;

[0038] 13. Second sealing strip;

[0039] 14. Fireproof and heat-insulating sealing strips;

[0040] 15. The third sealing strip. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] like Figure 1 to Figure 2 As shown, the steel structure thermal break ultra-low energy consumption passive door structure includes: a door frame structure 2 and a door leaf structure 3, the door frame structure 2 includes a first frame structure 21, a second frame structure 22, and a first thermal insulation strip 23, the first frame structure 21 and the second frame structure 22 are separated by the first thermal insulation strip 23, so that a first partition cavity 24 is formed between the first frame structure 21 and the second frame structure 22; the door leaf structure 3 includes a first door body structure 31, a second door body structure 32, a third door body structure 33, and a second thermal insulation strip 34, the first door body structure 31 and the second door body structure 32 are separated by the second thermal insulation strip 34, so that the first door body structure 31 and the second door body structure 32 form a second partition cavity 35; the first door body structure 31, the second door body structure 32, and the second thermal insulation strip 34 are arranged on the side of the third door body structure 33 close to the door frame structure 2.

[0043] In the present application, the problems of the traditional aluminum alloy thermal insulation structure are also avoided. Aluminum profiles are used. Aluminum profiles are made by molds. The shape and size are relatively fixed. Different shapes and sizes require different molds. In the present application, the first frame structure 21, the second frame structure 22, the first door structure 31, and the second door structure 32 are formed by steel sheet metal processing. They can be directly processed and formed according to the actual size. No corresponding molds are required, which is lower in cost. In the present application, the door structure is provided with the first frame structure 21 and the second frame structure 22 in the door frame structure 2, and the first insulation strip 23 is used to separate the two to form a first partition cavity 24, which effectively prevents the transfer of heat between the frames. In the door leaf structure 3, the first door body structure 31 and the second door body structure 32 are separated by the second insulation strip 34 to form a second partition cavity 35, which further enhances the thermal insulation performance of the door leaf.

[0044] The first partition cavity 24 effectively blocks the heat conduction path in the door frame by separating the first frame structure 21 from the second frame structure 22. When the heat is transferred from the outdoors to the indoors or from the indoors to the outdoors, it must cross the first partition cavity 24. The air in the partition cavity is relatively still and the heat conduction efficiency is low, thereby slowing down the heat transfer rate. The second partition cavity 35 separates the first door structure 31 and the second door structure 32, and also breaks the direct conduction of heat in the door leaf. This means that when there is a temperature difference between indoors and outdoors, the heat needs to pass through the second partition cavity 35, a "buffer zone", and its transfer process is significantly delayed.

[0045] The design of the present application has a better effect of blocking heat propagation. The first frame structure 21 and the second frame structure 22 do not overlap at any position, and the first door structure 31 and the second door structure 32 do not overlap at any position.

[0046] Furthermore, the first thermal insulation strip 23 and the second thermal insulation strip 34 are made of nylon material.

[0047] Specifically, it also includes a first fixing plate 4, a second fixing plate 5, a plurality of first screws 6, and a plurality of second screws 7. The first frame structure 21 has a first limiting groove 211, and the second frame structure 22 has a second limiting groove 221. One side of the first thermal insulation strip 23 is inserted into the second limiting groove 221, and the other side of the first thermal insulation strip 23 is inserted into the second limiting groove 221. The first thermal insulation strip 23 has a first thermal insulation channel 231. The first thermal insulation channel 231 has two first limiting portions 2311 and two second limiting portions 2312 that are symmetrically arranged along its length direction. The two first limiting portions 2311 and the first thermal insulation strip 2312 are symmetrically arranged along its length direction. The inner wall of the first fixing plate 23 forms two first slots 2313, and the two ends of the first fixing plate 4 are respectively inserted into the two first slots 2313; the two second limiting portions 2312 and the other inner wall of the first thermal insulation strip 23 form two second slots 2314, and the two ends of the second fixing plate 5 are respectively inserted into the two second slots 2314; the first screw 6 passes through the first frame structure 21, the first thermal insulation strip 23, and the first fixing plate 4, and the second screw 7 passes through the second frame structure 22, the first thermal insulation strip 23, and the second fixing plate 5 in sequence, so that the first frame structure 21, the second frame structure 22, and the first thermal insulation strip 23 are fixedly connected.

[0048] First, by setting the first limiting groove 211 and the second limiting groove 221 to fix the first thermal insulation strip 23, the accuracy and stability of the installation position of the first thermal insulation strip 23 can be ensured. The unique first thermal insulation channel 231 design inside the first thermal insulation strip 23, and the first clamping groove 2313 and the second clamping groove 2314 formed by the first limiting portion 2311 and the second limiting portion 2312 provide a stable installation position for the first fixing plate 4 and the second fixing plate 5. This design not only enhances the structural strength of the first thermal insulation strip 23 itself, making it less likely to deform in long-term use and maintaining good sealing performance, but also helps to improve the thermal insulation effect.

[0049] The first frame structure 21, the second frame structure 22 and the first thermal insulation strip 23 are fixedly connected by using the first screw 6 and the second screw 7 to pass through the corresponding components respectively, so that the entire connection structure is very firm and reliable. Even in the case of frequent opening and closing of the door, the close connection between the components can be ensured without loosening or displacement, thereby always maintaining good thermal insulation and sealing performance. Specifically, it also includes a third fixing plate 8, a fourth fixing plate 9, a plurality of third screws 10, and a plurality of fourth screws 11. The first door structure 31 has a third limiting groove 311, and the second frame structure 22 has a fourth limiting groove 321. One side of the second thermal insulation strip 34 is inserted into the third limiting groove 311, and the other side of the second thermal insulation strip 34 is inserted into the fourth limiting groove 321. The second thermal insulation strip 34 has a second thermal insulation channel 341. The second thermal insulation channel 341 has two third limiting portions 342 and two fourth limiting portions 343 arranged and symmetrically along its length direction. The two third limiting portions 342 and the second thermal insulation strip 343 are symmetrically arranged along its length direction. Two third slots 344 are formed on the inner wall of the strip 34, and the two ends of the third fixing plate 8 are respectively inserted into the two third slots 344; the two fourth limiting portions 343 and the other inner wall of the second thermal insulation strip 34 form two fourth slots 345, and the two ends of the fourth fixing plate 9 are respectively inserted into the two fourth slots 345; the third screw 10 passes through the first door structure 31, the second thermal insulation strip 34, and the third fixing plate 8, and the fourth screw 11 passes through the second door structure 32, the second thermal insulation strip 34, and the fourth fixing plate 9 in sequence, so that the first door structure 31, the second door structure 32, and the second thermal insulation strip 34 are fixedly connected.

[0050] The third limiting groove 311 and the fourth limiting groove 321 are set to accurately position the second thermal insulation strip 34, ensuring the stability and accuracy of its installation, thereby significantly enhancing the sealing effect. The second thermal insulation channel 341 in the second thermal insulation strip 34 and the limiting part and the slot structure inside are cleverly designed. The slot formed by the two third limiting parts 342 and the two fourth limiting parts 343 provides a stable installation position for the third fixing plate 8 and the fourth fixing plate 9, enhancing the structural stability and durability of the second thermal insulation strip 34 itself, making it not easy to deform and damage in long-term use, and can continue to play a good thermal insulation and sealing role. The first door structure 31, the second door structure 32 and the second thermal insulation strip 34 are tightly fixed and connected by passing through the corresponding components through the third screw 10 and the fourth screw 11, respectively, so that the entire connection structure is strong and durable. Even if the door is frequently used, the components can be tightly combined without loosening or offset, so as to always maintain excellent thermal insulation and sealing performance.

[0051] The existence of the first heat insulation channel 231 and the second heat insulation channel 341 increases the resistance to heat transfer. The air in the channel forms a natural heat insulation layer, and because the heat conductivity of air is poor, it can slow down the heat conduction speed inside the sealing strip.

[0052] Specifically, the first frame structure 21 is composed of a first door frame inner panel 212 and a first door frame outer panel 213, and the second frame structure 22 is composed of a second door frame inner panel 222 and a second door frame outer panel 223. The first door frame inner panel 212 and the second door frame inner panel 222 are connected by a first insulation strip 23.

[0053] The first frame structure 21 is composed of the first door frame inner panel 212 and the first door frame outer panel 213, and the second frame structure 22 is composed of the second door frame inner panel 222 and the second door frame inner panel. This splicing method is relatively simple and easy to operate, which reduces the complexity and difficulty of assembly and improves assembly efficiency. In terms of internal filling materials, since the size of the chamber 334 formed by the frame structure is clear, the filling material can be accurately processed according to the specific size of the chamber 334. This means that the filling material can perfectly match the chamber 334, reducing the adjustment and finishing work during the filling process, and improving the efficiency and quality of filling. After the filling is completed, the first frame structure 21 and the second frame structure 22 are assembled and spliced, so that the interior is guaranteed to be filled. Moreover, this method of processing the filling material according to the size of the chamber 334 can ensure the uniformity and tightness of the filling, thereby effectively improving the thermal insulation and sound insulation performance of the door frame.

[0054] Specifically, the first door body structure 31 is composed of a first door leaf outer panel 312 and a first door leaf inner panel 313, and the second door body structure 32 is composed of a second door leaf outer panel 322 and a second door leaf inner panel 323. The first door leaf inner panel 313 and the second door leaf inner panel 323 are connected by a second insulation strip 34.

[0055] In the present application, the first door leaf outer panel 312, the first door leaf inner panel 313, the second door leaf outer panel 322, and the second door leaf inner panel 323 are formed by sheet metal processing of steel plates. The first door body structure 31 is composed of the first door leaf outer panel 312 and the first door leaf inner panel 313, and the second door body structure 32 is composed of the second door leaf outer panel 322 and the second door leaf inner panel 323. This clear splicing method is simple and direct, which reduces the technical difficulty and complexity of assembly, and enables assembly work to be carried out quickly and efficiently. Since the composition method of the door body structure is clear, the size of the formed chamber 334 is clear and fixed, and the filling material can be customized according to the precise size of the chamber 334. This means that the filling material can perfectly match the cavity 334, reducing the adjustment and trimming work during the filling process, improving the efficiency and quality of the filling, and after the filling is completed, the first door body structure 31 and the second door body structure 32 are assembled and spliced ​​to ensure that the interior can be filled. Moreover, this method of processing the filling material according to the size of the cavity 334 can ensure the uniformity and tightness of the filling, thereby effectively improving the thermal insulation and sound insulation performance of the door leaf. Specifically, a first thermal insulation strip 23 is installed on the side of the first partition cavity 24, and a second thermal insulation strip 34 is installed on the side of the second partition cavity 35; the second frame structure 22 has an installation groove 224, and a fireproof and heat-insulating sealing strip 14 is installed in the installation groove 224, and the first frame structure 21 has a limiting step 214; the first door body structure 31 has a protrusion 314 adapted to the limiting step 214, and a third sealing strip 15 is installed on the protrusion 314. When the door leaf structure 3 and the door frame structure 2 are in a closed state, the second sealing strip 13 abuts against the first sealing strip 12 to form a seal, the third sealing strip 15 abuts against the limiting step 214 to form a seal, and the second door body structure 32 abuts against the fireproof and heat-insulating sealing strip 14 to form a seal.

[0056] The second sealing strip 13 abuts against the first sealing strip 12 to form a seal, further reducing the transfer of energy. The limiting step 214 on the first frame structure 21 cooperates with the protrusion 314 on the first door structure 31 and the installed third sealing strip 15. When the door leaf structure 3 and the door frame structure 2 are closed, the third sealing strip 15 abuts against the limiting step 214 to form a seal, ensuring the accuracy and stability of the seal, and is not easily affected by external forces and fails.

[0057] Specifically, the third door body structure 33 includes a door leaf core 331, an inner decorative panel 332, and an outer decorative panel 333. The outer decorative panel 333 is fixedly connected to the door leaf core 331, the first door body structure 31 is fixedly connected to the door leaf core 331, the inner decorative panel 332 is fixedly connected to the second door body structure 32, and a chamber 334 is formed between the inner decorative panel 332 and the door leaf core 331.

[0058] Specifically, the first frame structure 21 is filled with cement material, the second frame structure 22, the second door structure 32, and the cavity 334 are filled with thermal insulation materials, and the first door structure 31 and the door leaf and door core 331 are filled with fireproof insulation materials.

[0059] The cement material of the first frame structure 21 is filled after installation, while the thermal insulation material and the fireproof thermal insulation material are filled and installed before assembly.

[0060] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative position relationship and movement status of the components in a certain specific posture, as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0061] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. At the same time, the meaning of "and / or" appearing in the full text is that it includes three schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0062] The above components are all common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0063] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. Steel structure broken bridge ultra-low energy consumption passive door structure, characterized by: include: A door frame structure (2), the door frame structure (2) comprising a first frame structure (21), a second frame structure (22), and a first thermal insulation strip (23), the first frame structure (21) and the second frame structure (22) being separated by the first thermal insulation strip (23), so that a first partition cavity (24) is formed between the first frame structure (21) and the second frame structure (22); A door leaf structure (3), wherein the door leaf structure (3) comprises a first door body structure (31), a second door body structure (32), a third door body structure (33), and a second thermal insulation strip (34); the first door body structure (31) and the second door body structure (32) are separated by the second thermal insulation strip (34) so ​​that the first door body structure (31) and the second door body structure (32) form a second partition cavity (35); the first door body structure (31), the second door body structure (32), and the second thermal insulation strip (34) are arranged on a side of the third door body structure (33) close to the door frame structure (2).

2. The steel structure broken bridge ultra-low energy consumption passive door structure according to claim 1 is characterized in that: The invention also comprises a first fixing plate (4), a second fixing plate (5), a plurality of first screws (6), and a plurality of second screws (7); the first frame structure (21) has a first limiting groove (211); the second frame structure (22) has a second limiting groove (221); one side of the first thermal insulation strip (23) is inserted into the second limiting groove (221); the other side of the first thermal insulation strip (23) is inserted into the second limiting groove (221); the first thermal insulation strip (23) has a first thermal insulation channel (231); the first thermal insulation channel (231) has two first limiting portions (2311) and two second limiting portions (2312) which are symmetrically arranged along the length direction thereof; the two first limiting portions (2311) and the first thermal insulation strip (2312) are connected to each other. The inner wall of the first fixing plate (23) forms two first slots (2313), and the two ends of the first fixing plate (4) are respectively inserted into the two first slots (2313); the two second limiting portions (2312) and the other inner wall of the first thermal insulation strip (23) form two second slots (2314), and the two ends of the second fixing plate (5) are respectively inserted into the two second slots (2314); the first screw (6) passes through the first frame structure (21), the first thermal insulation strip (23), and the first fixing plate (4), and the second screw (7) passes through the second frame structure (22), the first thermal insulation strip (23), and the second fixing plate (5) in sequence, so that the first frame structure (21), the second frame structure (22), and the first thermal insulation strip (23) are fixedly connected.

3. The steel structure broken bridge ultra-low energy consumption passive door structure according to claim 2 is characterized in that: The invention also comprises a third fixing plate (8), a fourth fixing plate (9), a plurality of third screws (10), and a plurality of fourth screws (11); the first door structure (31) has a third limiting groove (311); the second frame structure (22) has a fourth limiting groove (321); one side of the second thermal insulation strip (34) is inserted into the third limiting groove (311); the other side of the second thermal insulation strip (34) is inserted into the fourth limiting groove (321); the second thermal insulation strip (34) has a second thermal insulation channel (341); the second thermal insulation channel (341) has two third limiting portions (342) and two fourth limiting portions (343) which are symmetrically arranged along its length direction; the two third limiting portions (342) and the second thermal insulation strip (341) are connected to each other. The inner wall of the strip (34) forms two third slots (344), and the two ends of the third fixing plate (8) are respectively inserted into the two third slots (344); the two fourth limiting parts (343) and the other inner wall of the second thermal insulation strip (34) form two fourth slots (345), and the two ends of the fourth fixing plate (9) are respectively inserted into the two fourth slots (345); the third screw (10) passes through the first door structure (31), the second thermal insulation strip (34), and the third fixing plate (8), and the fourth screw (11) passes through the second door structure (32), the second thermal insulation strip (34), and the fourth fixing plate (9) in sequence, so that the first door structure (31), the second door structure (32), and the second thermal insulation strip (34) are fixedly connected.

4. The steel structure broken bridge ultra-low energy consumption passive door structure according to claim 3 is characterized in that: The first frame structure (21) is composed of a first door frame inner panel (212) and a first door frame outer panel (213), and the second frame structure (22) is composed of a second door frame inner panel (222) and a second door frame outer panel (223), and the first door frame inner panel (212) and the second door frame inner panel (222) are connected via a first thermal insulation strip (23).

5. The steel structure broken bridge ultra-low energy consumption passive door structure according to claim 4 is characterized in that: The first door body structure (31) is composed of a first door leaf outer panel (312) and a first door leaf inner panel (313), and the second door body structure (32) is composed of a second door leaf outer panel (322) and a second door leaf inner panel (323), and the first door leaf inner panel (313) and the second door leaf inner panel are connected via a second thermal insulation strip (34).

6. The steel structure broken bridge ultra-low energy consumption passive door structure according to claim 5 is characterized in that: A first sealing strip (12) is installed on the side of the first partition cavity (24), and a second sealing strip (13) is installed on the side of the second partition cavity (35); the second frame structure (22) has an installation groove (224), and a fireproof and heat-insulating sealing strip (14) is installed in the installation groove (224); the first frame structure (21) has a limiting step (214); the first door structure (31) has a protrusion (314) adapted to the limiting step (214), and a third sealing strip (15) is installed on the protrusion (314); when the door leaf structure (3) and the door frame structure (2) are in a closed state, the second sealing strip (13) abuts against the first sealing strip (12) to form a seal, the third sealing strip (15) abuts against the limiting step (214) to form a seal, and the second door structure (32) abuts against the fireproof and heat-insulating sealing strip (14) to form a seal.

7. The steel structure broken bridge ultra-low energy consumption passive door structure according to claim 1 is characterized in that: The third door body structure (33) includes a door leaf core (331), an inner decorative panel (332), and an outer decorative panel (333); the outer decorative panel (333) is fixedly connected to the door leaf core (331); the first door body structure (31) is fixedly connected to the door leaf core (331); the inner decorative panel (332) is fixedly connected to the second door body structure (32); and a chamber (334) is formed between the inner decorative panel (332) and the door leaf core (331).

8. The steel structure broken bridge ultra-low energy consumption passive door structure according to claim 7 is characterized in that: The first frame structure (21) is filled with cement material, the second frame structure (22), the second door structure (32) and the chamber (334) are filled with thermal insulation material, and the first door structure (31) and the door leaf and door core (331) are filled with fireproof insulation material.

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