External fireproof and smoke-proof sealing mechanism mounted at bottom of door leaf

Abstract

The utility model relates to an external fire-proof and smoke-proof sealing mechanism mounted at the bottom of a door leaf, which comprises an L-shaped positioning piece and a sealing strip main body connected to the bottom of the positioning piece, and sealing strip main body mounting grooves are formed in two sides of the bottom end of a transverse straight part of the positioning piece; the two sides of the sealing strip body are installed in the sealing strip installation grooves respectively, a fireproof expansion sealing piece installation cavity is formed in the middle of the bottom end of the transverse straight portion of the positioning piece, a fireproof expansion sealing piece is installed in the fireproof expansion sealing piece installation cavity, and an installation hole is formed in the vertical portion of the positioning piece. And the positioning piece can be mounted at the bottom of the door leaf by penetrating a screw through the mounting hole. According to the external fireproof and smoke-proof sealing mechanism installed at the bottom of the door leaf, the mode that the external fireproof and smoke-proof sealing mechanism is externally installed on the periphery of the door frame and fixedly installed through the screws is adopted, so that the whole installation process is convenient and fast, a gap of a lower door slot can be completely sealed when a fire disaster happens, and smoke and flames are prevented from overflowing from the gap.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing strips, in particular to an external fireproof and smokeproof sealing mechanism installed at the bottom of a door leaf. Background Art

[0002] For example, the automatic lifting and dropping sealing device embedded in the bottom of the door disclosed in the publication number CN201535125U includes a narrow groove profile that matches the width of the door, an H-shaped frame that is the same length as the narrow groove profile, a scissor-type connecting rod telescopic frame, a button device, and a flexible sealing strip. The button device is composed of a push rod, a spring, a supporting sheet, and a button installed at the end of the push rod. However, this structural sealing device is too complicated and very inconvenient to install, so it is not conducive to people's selection. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and to provide an external fireproof and smokeproof sealing mechanism which is simple in structure and easy to install and is installed at the bottom of a door leaf.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] An external fireproof and smokeproof sealing mechanism installed at the bottom of a door leaf, comprising an L-shaped positioning piece and a sealing strip body connected to the bottom of the positioning piece, sealing strip body installation grooves are arranged on both sides of the bottom end of the horizontal and vertical part of the positioning piece, and both sides of the sealing strip body are respectively installed in the sealing strip body installation grooves, a fireproof expansion sealing component installation cavity is arranged in the middle of the bottom end of the horizontal and vertical part of the positioning piece, a fireproof expansion sealing component is installed in the fireproof expansion sealing component installation cavity, and a mounting hole is arranged on the vertical part of the positioning piece, and the positioning piece can be installed at the bottom of the door leaf by passing screws through the mounting hole.

[0006] Furthermore, a sealing member installation groove is provided on the end of the horizontal portion of the positioning member away from the vertical portion of the positioning member, and a sealing member is installed in the sealing member installation groove.

[0007] Furthermore, the cross-section of the sealing strip body is U-shaped, the upper ends of the two vertical parts of the sealing strip body are each provided with a T-shaped clamping part, and the two side walls of the open end of the sealing strip body installation groove are each provided with a limit block that can form a stop with the clamping part.

[0008] Furthermore, a plurality of first abutment strips distributed at intervals are arranged at the lower end of the sealing strip body, and a second abutment strip is arranged on the inner end surface of the sealing strip body.

[0009] Furthermore, the cross-section of the seal installation groove is C-shaped and the open end is flush with the end face of the horizontal portion of the positioning member. The seal includes a seal body and a mounting portion with an arrow-shaped cross-section. The mounting portion and the seal body are an integrally formed connection structure. The seal is installed in the seal installation groove through the mounting portion.

[0010] Furthermore, a cover plate installation groove is arranged on the outer side surface of the vertical portion of the positioning member, the installation hole is arranged in the cover plate installation groove, and a cover plate is arranged in the cover plate installation groove.

[0011] Preferably, the sealing strip body, the sealing member and the cover plate are all made of silicone rubber.

[0012] Preferably, the positioning member is made of aluminum alloy.

[0013] Preferably, the fireproof expansion seal is made of fireproof expanded graphite.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] Firstly, the utility model provides an external fireproof and smokeproof sealing mechanism installed at the bottom of the door leaf, and its L-shaped positioning piece is separate from the door leaf. When the sealing mechanism needs to be fixed at the bottom of the door leaf, the positioning piece can be directly fixed at the bottom of the leaf by screwing through the mounting hole, and the installation is very convenient and quick.

[0016] Secondly, the seal installation groove on the horizontal part of the positioning member and the structural design of the seal in the utility model enable the seal to be bent and always fit with the bottom of the door leaf when the sealing mechanism is installed at the bottom of the door leaf, which can further seal the gap between the horizontal part of the positioning member and the bottom of the door leaf. In the event of a fire, the gap between the horizontal part of the positioning member and the bottom of the door leaf is completely closed to prevent smoke and flames from overflowing from this gap.

[0017] Thirdly, the fireproof expansion seal installed in the fireproof expansion seal installation cavity of the utility model can be made of expanded graphite and begin to expand until it expands to 20 times the size of the original body when the temperature reaches about 200° during a fire in the outside, thereby completely sealing the gap of the lower door seam and preventing smoke and flames from overflowing from this gap.

[0018] Finally, the sealing strip body and the sealing element in the utility model are made of silicone rubber, which has excellent heat resistance and has a good isolating and sealing effect on isolating medium-temperature smoke. The sealing strip body made of silicone rubber can work for a long time at 180°C, and can withstand several weeks or longer at slightly higher than 200°C, and can instantly withstand high temperatures above 300°C. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a three-dimensional structural schematic diagram of an external fireproof and smokeproof sealing mechanism installed at the bottom of a door leaf.

[0020] Figure 2 The utility model is a top view structural schematic diagram of an external fireproof and smokeproof sealing mechanism installed at the bottom of a door leaf.

[0021] Figure 3 The utility model is a schematic diagram of the exploded structure of an external fireproof and smokeproof sealing mechanism installed at the bottom of a door leaf. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below with reference to the embodiments given in the accompanying drawings.

[0023] like Figures 1 to 3 As shown, this embodiment provides an external fireproof and smokeproof sealing mechanism installed at the bottom of the door leaf, including an L-shaped positioning member 1 and a sealing strip body 2 connected to the bottom of the positioning member 1, and the positioning member 1 is made of aluminum alloy, so that the sealing mechanism is more sturdy and reliable. Sealing strip body mounting grooves 12 are provided on both sides of the bottom end of the horizontal portion 11 of the positioning member 1, and both sides of the sealing strip body 2 are respectively installed in the sealing strip body mounting grooves 12. A fireproof expansion seal installation cavity 3 is provided in the middle of the bottom end of the horizontal portion 11 of the positioning member 1, and a fireproof expansion seal 4 is installed in the fireproof expansion seal installation cavity 3. Specifically, the fireproof expansion seal 4 is pasted in the fireproof expansion seal installation cavity 3. A mounting hole 5 is provided on the vertical portion 13 of the positioning member 1, and the positioning member 5 can be installed at the bottom of the door leaf by screws passing through the mounting hole 5.

[0024] As described above, the end of the horizontal portion 11 of the positioning member 1 away from the vertical portion 13 of the positioning member 1 is provided with a sealing member installation groove 6, and a sealing member 61 is installed in the sealing member installation groove 6. Such a structural design enables the sealing member 61 to be bent and always fit with the bottom of the door leaf when the sealing mechanism is installed at the bottom of the door leaf, and can further seal the gap between the horizontal portion 11 of the positioning member 1 and the bottom of the door leaf. In the event of a fire, the gap between the horizontal portion 11 of the positioning member 1 and the bottom of the door leaf is completely sealed to prevent smoke and flames from overflowing from this gap.

[0025] As described above, the cross-section of the sealing strip body 2 is U-shaped, and the upper ends of the two vertical parts of the sealing strip body 2 are each provided with a T-shaped clamping portion 21, and the two side walls of the open end of the sealing strip body installation groove 12 are each provided with a limit block 121 that can form a stop with the clamping portion 21.

[0026] As described above, the lower end of the sealing strip body 2 is provided with a plurality of first contact strips 22 distributed at intervals, and four first contact strips 22 are provided and are spaced along the lower end of the sealing strip body 2. Specifically, the first contact strip 22 can contact the ground. In the reciprocating door closing process, in order to prevent the sealing strip body 2 from wearing too quickly, an aluminum profile slope transition bottom sill that can cooperate with the sealing strip body 2 can also be provided at the ground position at the bottom of the door leaf, so that the sealing performance of its sealing mechanism can be better exerted. A second contact strip 23 is provided on the inner end surface of the sealing strip body 2. Specifically, two second contact strips 23 are provided and are located directly below the fireproof expansion seal 4. When the fireproof expansion seal 4 expands, the second contact strip 23 can be squeezed to bend to both sides and always abut against the second contact strip 23, so that the sealing effect of the sealing mechanism is better.

[0027] As described above, the cross section of the seal installation groove 6 is C-shaped and the open end is flush with the end face of the horizontal portion 11 of the positioning member 1. The seal 61 includes a seal body 62 and a mounting portion 63 with an arrow-shaped cross section. The mounting portion 63 and the seal body 62 are an integrally formed connection structure. The seal 61 is installed in the seal installation groove 6 through the mounting portion 63 and the seal body 62 is vertically upward and parallel to the vertical portion 13 of the positioning member 2. Specifically, when the sealing mechanism is installed at the bottom of the door leaf, the seal body 62 is squeezed by the end face of the bottom of the door leaf and bent toward the end away from the vertical portion 13 of the positioning member 1, and the seal body 63 is always in contact with the end face of the bottom of the door leaf.

[0028] As described above, a cover plate installation groove 14 is provided on the outer side surface of the vertical portion 13 of the positioning member 1, and the installation hole 5 is provided in the cover plate installation groove 14. A cover plate 15 is provided in the cover plate installation groove 14, and the cover plate 15 can be used to cover the installation hole 5 to make the sealing mechanism more beautiful. Specifically, during installation, the inner side surface of the vertical portion 13 of the positioning member 1 is attached to the side surface of the door leaf, and the inner side surface of the horizontal portion 11 of the positioning member 1 is attached to the end surface of the bottom of the door leaf, and then the screw is passed through the installation hole 5 to fix it to the bottom end of the door leaf.

[0029] As mentioned above, the sealing strip body 2, the sealing member 61 and the cover plate 15 are all made of silicone rubber. Since silicone rubber has good heat resistance, it has a good insulating and sealing effect on isolating medium-temperature smoke, so that the sealing strip body 2 and the sealing member 61 made of silicone material can work for a long time at 180°C, can withstand several weeks or longer at a temperature slightly higher than 200°C, and can withstand high temperatures above 300°C instantly.

[0030] As mentioned above, the fireproof expansion seal 4 is made of fireproof expansion graphite. Such a structural design allows the fireproof expansion seal to expand to 20 times its original size when the temperature reaches about 200° when a fire occurs outside, and can completely seal the gap of the lower door seam, preventing smoke and flames from escaping from the gap.

[0031] The above is only a preferred embodiment of the present utility model, and it cannot be used to limit the scope of the present utility model. That is, all simple equivalent changes and modifications made according to the scope of the patent application of the present utility model and the content of the utility model description are still within the scope of the present utility model patent.

Claims

1. An external fire and smoke sealing mechanism installed at the bottom of a door leaf, characterized in that: It includes an L-shaped positioning piece and a sealing strip body connected to the bottom of the positioning piece, sealing strip body installation grooves are arranged on both sides of the bottom end of the horizontal part of the positioning piece, both sides of the sealing strip body are respectively installed in the sealing strip body installation grooves, a fireproof expansion seal installation cavity is arranged in the middle of the bottom end of the horizontal part of the positioning piece, a fireproof expansion seal is installed in the fireproof expansion seal installation cavity, a mounting hole is arranged on the vertical part of the positioning piece, and the positioning piece can be installed at the bottom of the door leaf by passing screws through the mounting hole.

2. According to claim 1, an external fireproof and smokeproof sealing mechanism installed at the bottom of a door leaf is characterized in that: A sealing member installation groove is arranged on the end of the horizontal portion of the positioning member away from the vertical portion of the positioning member, and a sealing member is installed in the sealing member installation groove.

3. According to claim 2, an external fireproof and smokeproof sealing mechanism installed at the bottom of a door leaf is characterized in that: The cross section of the sealing strip body is U-shaped, the upper ends of the two vertical parts of the sealing strip body are provided with T-shaped clamping parts, and the two side walls of the opening end of the sealing strip body installation groove are provided with limit blocks that can form a stop with the clamping parts.

4. According to claim 3, an external fire and smoke sealing mechanism installed at the bottom of a door leaf is characterized in that: A plurality of first abutment strips distributed at intervals are arranged at the lower end of the sealing strip body, and a second abutment strip is arranged on the inner end surface of the sealing strip body.

5. According to claim 4, an external fireproof and smokeproof sealing mechanism installed at the bottom of a door leaf is characterized in that: The cross-section of the seal installation groove is C-shaped and the open end is flush with the end face of the horizontal portion of the positioning member. The seal includes a seal body and a mounting portion with an arrow-shaped cross-section. The mounting portion and the seal body are an integrally formed connection structure. The seal is installed in the seal installation groove through the mounting portion.

6. The external fire and smoke sealing mechanism installed at the bottom of the door leaf according to claim 5, characterized in that: A cover plate installation groove is arranged on the outer side surface of the vertical portion of the positioning member, the installation hole is arranged in the cover plate installation groove, and a cover plate is arranged in the cover plate installation groove.

7. The external fire and smoke sealing mechanism installed at the bottom of the door leaf according to claim 6, characterized in that: The sealing strip body, the sealing element and the cover plate are all made of silicone rubber.

8. The external fire and smoke sealing mechanism installed at the bottom of the door leaf according to claim 7, characterized in that: The positioning piece is made of aluminum alloy.

9. The external fire and smoke sealing mechanism installed at the bottom of a door leaf according to claim 1, characterized in that: The fireproof expansion seal is made of fireproof expanded graphite.

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