A kind of broken bridge steel security door
By using thermally broken profiles and multiple sealing strips in the security door, the problem of gaps between the door frame and the door leaf in traditional security doors is solved, achieving better airtightness and sound and heat insulation effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG XINGYUE SECURITY TECH CO LTD
- Filing Date
- 2025-07-30
- Publication Date
- 2026-07-14
AI Technical Summary
Traditional security doors have gaps between the door frame and the door leaf, resulting in poor sound insulation and heat preservation.
It adopts a thermal break profile and multiple sealing strip design, including thermal break profiles for the door frame and door leaf, with first and second sealing strips respectively. The sealing strips are installed through an embedded process, and a third sealing strip is provided on the front side of the door leaf. When the door leaf comes into contact with the door frame, the sealing strips are squeezed against each other to enhance the sealing performance.
It improves the airtightness and heat insulation of the security door, enhances its sealing performance, reduces the gap between the door leaf and the side frame, and improves sound insulation and heat preservation.
Smart Images
Figure CN224496267U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of security door technology, and in particular to a thermally broken steel security door. Background Technology
[0002] Security doors are very common in daily life. They are a type of door product used to improve the security of doors and windows. They typically employ special structural designs and materials to increase resistance to strong prying, impacts, and other forms of damage. With social development and technological advancements, people have increasingly higher demands for home security and living environments. While traditional security doors can provide some protection against theft, they are insufficient in areas such as sound insulation and heat preservation.
[0003] Currently, most security doors on the market use multiple sealing strips, which improve the airtightness of the security door to a certain extent, but there is a gap between the door frame and the door leaf. For example, Chinese utility model patent CN210622628U discloses a non-clamping armored door, which includes a door frame, two door leaves, a lock, and multiple hinges. The two door leaves are connected to the door frame by hinges, and the side steel plate located on the side of the door leaf is connected to the door frame by hinges. A first sealing element and a second sealing element are respectively provided at the joint position of the upper and lower ends of the door frame and the side steel plate.
[0004] The first sealing element on the inner side of the door frame contacts and abuts against the inner side of the door leaf, and the first sealing element on the outer side of the door leaf contacts and abuts against the outer side of the door frame. The door frame and the door leaf rely on the two first sealing elements. When the door leaf is closed, the first sealing elements are squeezed, and there will be a gap between the door frame and the door leaf, which will reduce the sound insulation and heat preservation effect of the door leaf. Utility Model Content
[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a thermal break steel security door that not only has multiple sealing strips, but also uses thermal break profiles to further improve the airtightness and heat insulation of the security door.
[0006] The objective of this utility model is achieved through the following technical solution:
[0007] A thermally broken steel security door includes a door frame and a door leaf. The door frame includes two opposing door frames and an upper door frame and a lower door frame connected to the upper and lower ends of the two door frames. One side of the door leaf is connected to one door frame via a concealed hinge, and the other side of the door leaf is connected to the other door frame via a lock. Each door frame, upper door frame, and lower door frame has a thermally broken profile on the rear side of the side closest to the door leaf. The rear side of the thermally broken profile has a first sealing strip, which seals against the rear end of the door leaf on the same side. The front side of the thermally broken profile has a second sealing strip. The other side of the door leaf has a thermally broken profile, and the rear side of the thermally broken profile has a second sealing strip that faces and abuts against the front side of the thermally broken profile of the door frame on the same side. The front left and right sides of the door leaf each have a third sealing strip along the vertical direction, which seals against the front side of the side door frame on the same side.
[0008] Furthermore, the rear side of the thermally broken door frame profile is provided with a first groove that opens to the same side of the door leaf, and the front side of the thermally broken door frame profile is provided with a second groove that opens to the front. The first sealing strip and the second sealing strip on the thermally broken door frame profile are respectively embedded in the first groove and the second groove.
[0009] Furthermore, the rear side of the door panel thermal break profile is provided with a third recess that opens to the rear, and the second sealing strip on the door panel thermal break profile is embedded in the third recess.
[0010] Furthermore, the first sealing strip includes a front section of the first sealing strip that abuts against the side of the door leaf and a rear section of the first sealing strip that abuts against the rear side of the door leaf.
[0011] Furthermore, the first and second sealing strips are EPDM sealing strips.
[0012] Furthermore, the front side of the door panel thermal break profile is provided with a fourth recessed groove that opens to the side door frame on the same side, and the fourth recessed groove is provided with an abutting part that abuts against the front side of the side door frame on the same side.
[0013] Furthermore, the front end of the door leaf is provided with the third sealing strip on the upper and lower sides in the horizontal direction, and the third sealing strip is respectively sealed to the front side of the upper door frame and the lower door frame.
[0014] Furthermore, a fourth sealing strip is provided on the upper and lower sides of the door leaf and on the side hinged to the side door frame, and the fourth sealing strip abuts against the second sealing strip on the same side.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] Firstly, the inner sides of both door frames, the upper door frame, and the lower door frame of this utility model are provided with door frame thermal break profiles. The first sealing strip is embedded in the rear side of the door frame thermal break profile. When the door leaf comes into contact with the first sealing strip, the contact surface of the first sealing strip with the door leaf and the rear side of the door leaf abut and seal. The front side of the door frame thermal break profile is provided with a second sealing strip. The door leaf is provided with a door leaf thermal break profile on the side of the lock. The second sealing strip is embedded in the rear side of the door leaf thermal break profile. When the two second sealing strips come into contact, they squeeze and abut against each other, providing multiple seals and further improving the sound insulation and heat insulation performance of the door leaf. The sealing strip is embedded in the thermal break profile, which makes the sealing performance better when the sealing strip comes into contact and abuts.
[0017] Secondly, the top and bottom ends of the front side of the door are provided with third sealing strips in the horizontal direction, and the left and right sides of the front side of the door are provided with third sealing strips in the vertical direction. When the door is closed, the third sealing strips contact and abut against the door frame on the corresponding side, further improving the sound insulation and heat insulation performance of the door. Attached Figure Description
[0018] Figure 1 This is a cross-sectional schematic diagram of a thermally broken steel security door according to this utility model.
[0019] Figure 2 This is a schematic diagram of the left door frame of a thermally broken steel security door according to this utility model.
[0020] Figure 3 This is a schematic diagram of the right side door frame of a thermally broken steel security door according to this utility model.
[0021] Figure 4 This is a vertical sectional view of a thermally broken steel security door according to this utility model.
[0022] Figure 5 This is a schematic diagram of the lower door frame of a thermally broken steel security door according to this utility model.
[0023] Figure 6 This is a front view of a thermally broken steel security door according to this utility model. Detailed Implementation
[0024] The present invention will be further described in detail below with reference to the embodiments shown in the accompanying drawings.
[0025] like Figures 1 to 6As shown, this embodiment provides a thermally broken steel security door, including a door frame 1 and a door leaf 2. The door frame 1 includes two opposing door frames 11 and 12, and an upper door frame 13 and a lower door frame 14 connected to the upper and lower ends of the two door frames 11 and 12. One side of the door leaf 2 is connected to one door frame 12 via a concealed hinge, and the other side of the door leaf 2 is connected to the other door frame 11 via a lock. Each door frame 11 and 12, and each upper door frame 13 and lower door frame 14, has a thermally broken steel profile 3 on the rear side of the side near the door leaf 2. A first sealing strip 51 is provided on the rear side of the profile 3. The first sealing strip 51 is sealed and fitted with the rear end of the door leaf 2 on the same side. A second sealing strip 52 is provided on the front side of the door frame thermal break profile 3. A door leaf thermal break profile 4 is provided on the other side of the door leaf 2. A second sealing strip 52 is provided on the rear side of the door leaf thermal break profile 4, which faces and abuts against the front side of the door frame thermal break profile 3 on the same side. A third sealing strip 53 is provided on the left and right sides of the front end of the door leaf 2 along the vertical direction. The third sealing strip 53 is sealed and fitted with the front side of the side door frames 11 and 12 on the same side.
[0026] In this embodiment, the rear side of the door frame thermal break profile 3 is provided with a first groove 31 with an opening on the side of the door leaf 2 facing the same side, and the front side of the door frame thermal break profile 3 is provided with a second groove 32 with an opening facing forward. The first sealing strip 51 and the second sealing strip 52 on the door frame thermal break profile 3 are respectively embedded in the first groove 31 and the second groove 32.
[0027] refer to Figure 2 In this embodiment, a third recess 41 with a rearward opening is provided on the rear side of the door panel thermal break profile 4. The second sealing strip 52 on the door panel thermal break profile 4 is embedded in the third recess 41. The lock and the door panel thermal break profile 4 are located on the same side. There is a gap between the lock and the side door frame 11. When the door panel 2 is closed, the two second sealing strips 52 are tightly pressed against each other and embedded in the second recess 32 and the third recess 41 respectively, ensuring the airtightness of the security door.
[0028] The door frame thermal break profile 3 and the door leaf thermal break profile 4 are fixed on the door frame and door leaf 2 respectively. The first sealing strip 51 and the second sealing strip 52 adopt an embedded process, which makes installation convenient and reduces costs.
[0029] In this embodiment, the first sealing strip 51 includes a front section 511 of the first sealing strip that abuts against the side of the door leaf 2 and a rear section 512 of the first sealing strip that abuts against the rear side of the door leaf 2.
[0030] When the door leaf 2 is closed, the first sealing strip 51 on the rear side of the left and right side door frames 11 and 12, with the front section 511 of the first sealing strip tightly attached to the rear side of the left and right sides of the door leaf 2 and the rear section 512 of the first sealing strip tightly attached to the rear side of the door leaf 2; the first sealing strip 51 on the rear side of the upper door frame 13 and the lower door frame 14, with the front section 511 of the first sealing strip tightly attached to the rear side of the upper and lower sides of the door leaf 2 and the rear section 512 of the first sealing strip tightly attached to the rear side of the door leaf 2, enhances the sealing performance.
[0031] In this embodiment, the first sealing strip 51 and the second sealing strip 52 are EPDM sealing strips.
[0032] In this embodiment, the front side of the door panel thermal break profile 4 is provided with a fourth groove 42 that opens to the side door frame 11 on the same side. The fourth groove 42 is provided with an abutting part 43 that abuts against the front side of the side door frame 11 on the same side. When the door panel 2 is closed, the abutting part 43 and the side door frame 11 come into contact with each other, and the abutting part 43 is embedded into the fourth groove 42. This not only buffers the door panel 2 and prevents the door panel 1 from colliding with the side door frame 11 when too much force is applied, thus reducing the noise, but also reduces the gap between the door panel 1 and the side door frame 11 to a certain extent, thereby improving airtightness.
[0033] In this embodiment, the upper and lower sides of the front end of the door leaf 2 are respectively provided with a third sealing strip 53 along the horizontal direction, and the third sealing strip 53 is respectively sealed and cooperated with the front side of the upper door frame 13 and the lower door frame 14.
[0034] The interior of the door leaf 2 is filled with sound insulation material 21 between the outer and inner sides. The sound insulation material 21 is preferably a sound insulation material with heat insulation function, such as polyurethane material.
[0035] In this embodiment, a fourth sealing strip 54 is provided on the upper and lower sides of the door leaf 2 and on the side hinged to the side door frame 12. The fourth sealing strip 54 abuts against the second sealing strip 52 on the same side, which greatly improves the sealing performance, further improves the sound insulation and heat preservation performance, and improves the user experience.
[0036] Multiple sealing strips are installed between the door leaf 2 and the door frame, thereby improving the sound insulation and heat insulation effect of the door; and the first sealing strip 51 and the second sealing strip 52 are installed on the thermal break profile 3 of the door frame and the thermal break profile 4 of the door leaf, further improving the sound insulation and heat insulation effect of the door.
[0037] The above description is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Any simple equivalent changes and modifications made in accordance with the scope of the present utility model patent application and the description of the utility model shall still fall within the scope of the present utility model patent.
Claims
1. A thermally broken steel security door, comprising a door frame and a door leaf, wherein the door frame includes two opposing door frames and an upper door frame and a lower door frame connected to the upper and lower ends of the two door frames, one side of the door leaf is connected to one door frame via a concealed hinge, and the other side of the door leaf is connected to the other door frame via a lock, characterized in that: Each side of the door frame, the upper door frame, and the lower door frame has a door frame thermal break profile on the rear side of the side closest to the door leaf. The rear side of the door frame thermal break profile has a first sealing strip, which is sealed to the rear end of the door leaf on the same side. The front side of the door frame thermal break profile has a second sealing strip. The other side of the door leaf has a door leaf thermal break profile, and the rear side of the door leaf thermal break profile has a second sealing strip that faces and abuts against the front side of the door frame thermal break profile on the same side. The front left and right sides of the door leaf each have a third sealing strip along the vertical direction, which is sealed to the front side of the side door frame on the same side.
2. The thermally broken steel security door according to claim 1, characterized in that: The rear side of the thermally broken door frame profile has a first groove with an opening facing the same side of the door leaf, and the front side of the thermally broken door frame profile has a second groove with an opening facing forward. The first sealing strip and the second sealing strip on the thermally broken door frame profile are respectively embedded in the first groove and the second groove.
3. A thermally broken steel security door according to claim 2, characterized in that: The rear side of the thermally broken door profile is provided with a third recess that opens to the rear, and the second sealing strip on the thermally broken door profile is embedded in the third recess.
4. A thermally broken steel security door according to claim 3, characterized in that: The first sealing strip includes a front section that abuts against the side of the door leaf and a rear section that abuts against the rear side of the door leaf.
5. A thermally broken steel security door according to claim 4, characterized in that: The first and second sealing strips are EPDM sealing strips.
6. A thermally broken steel security door according to claim 5, characterized in that: The front side of the thermally broken profile of the door leaf is provided with a fourth recessed groove with an opening facing the same side of the door frame. The fourth recessed groove is provided with an abutting part that abuts against the front side of the side of the same side of the door frame.
7. A thermally broken steel security door according to claim 5, characterized in that: The third sealing strip is provided on the upper and lower sides of the front end of the door leaf in a horizontal direction, and the third sealing strip is respectively sealed to the front side of the upper door frame and the lower door frame.
8. A thermally broken steel security door according to claim 5, characterized in that: A fourth sealing strip is provided on the upper and lower sides of the door leaf and on the side hinged to the side door frame, and the fourth sealing strip abuts against the second sealing strip on the same side.