Replaceable threshold for high airtight swing door and construction method

Abstract

The present invention relates to a high-air-tightness replaceable threshold for a swing door and a construction method. The high-air-tightness replaceable threshold for a swing door comprises a fixed base, an indoor replaceable threshold and an outdoor replaceable threshold. An inner threshold connection portion is provided on the outer side of the indoor replaceable threshold, and an outer threshold connection portion is provided on the inner side of the outdoor replaceable threshold. The outer threshold connection portion, the inner threshold connection portion and the protruding portion are connected and fixed together by connecting pieces. During construction, a door frame including a fixed base, an indoor replaceable threshold and an outdoor replaceable threshold are prefabricated in advance in a factory, so that the installation construction of the door frame and the replaceable threshold can be completed quickly, and the sealing of the door frame and the threshold can be ensured. The present invention has low cost, and can maintain good airtightness for a swing door threshold that is easily damaged and has a short life cycle for a long time by replacing local components, effectively reducing energy consumption during building operation and maintenance, and is particularly suitable for passive ultra-low energy consumption buildings.

Description

Technical Field

[0001] The invention relates to a swing door threshold, in particular to a replaceable swing door threshold with high air tightness and a construction method. Background Art

[0002] With the promotion of "carbon neutrality" and people's increasing requirements for the indoor environment of buildings, the promotion potential of refined design and construction technology of ultra-low energy consumption buildings is becoming increasingly prominent.

[0003] The loss of air tightness of building components will increase the ineffective load of the building, but most of my country's building energy-saving technologies focus on the thermal insulation performance of the enclosure structure, and less research has been done on the ineffective heat loss caused by air infiltration. Compared with building walls, doors and windows have greater air infiltration. The thresholds of high-air-tightness swing doors are more easily damaged than other swing door components due to trampling, collisions, etc., resulting in problems such as reduced air tightness of swing doors and increased cold air infiltration, which increases the operating load of the building. In order to ensure the air tightness of the components, the entire swing door needs to be replaced together with the door frame fixed to the base and wall. This replacement method consumes a lot of resources, is costly, and is inconvenient to construct. It is also easy to damage the existing building structure layer, insulation layer, and base.

[0004] At the same time, the design service life of a building is generally 50 years, but the service life of its components is often shorter. Replacing damaged building components often destroys the existing building structure, insulation layer and base surface, which is difficult and costly to construct. How to conveniently replace damaged components while maintaining the performance of building components is of great significance to reducing building energy consumption. Summary of the invention

[0005] The purpose of the present invention is to provide a replaceable threshold for a high-air-tightness swing door and a construction method to solve the problems of high cost, great construction difficulty and damage to the existing building structure layer, insulation layer and base surface when replacing the threshold of the existing high-air-tightness swing door.

[0006] The present invention is achieved as follows: a highly airtight replaceable threshold for a swing door, comprising a fixed base, a raised portion being provided on the top of the fixed base, the length direction of the raised portion being consistent with the length direction of the fixed base, an indoor replaceable threshold and an outdoor replaceable threshold being provided above the fixed base, an inner threshold connecting portion being provided on the outer side of the indoor replaceable threshold, and an outer threshold connecting portion being provided on the inner side of the outdoor replaceable threshold, the bottom surface of the indoor replaceable threshold being in sealing contact with the top surface of the fixed base, the lower side surface of the inner threshold connecting portion being in sealing contact with the top surface of the raised portion, the bottom surface of the outdoor replaceable threshold being in sealing contact with the top surface of the fixed base, the lower side surface of the outer threshold connecting portion being in sealing contact with the upper side surface of the inner threshold connecting portion, and the outer threshold connecting portion, the inner threshold connecting portion and the raised portion being connected and fixed together by a connecting piece.

[0007] Furthermore, the outer side surface of the indoor replaceable threshold coincides with the inner side surface of the raised portion and the inner side surface of the outer threshold connecting portion, and the outer side surface of the inner threshold connecting portion coincides with the outer side surface of the raised portion and the inner side surface of the outdoor replaceable threshold.

[0008] Furthermore, the top of the outer threshold connection part is higher than the top surface of the outdoor replaceable threshold, and the outer side surface of the outer threshold connection part forms a first sealing contact surface in sealing contact with the swing door, and the indoor replaceable threshold is higher than the outer threshold connection part, and the outer side surface of the indoor replaceable threshold forms a second sealing contact surface in sealing contact with the swing door.

[0009] Furthermore, the inner side surface of the indoor replaceable threshold coincides with the inner side surface of the fixed base, and the outer side surface of the outdoor replaceable threshold coincides with the outer side surface of the fixed base.

[0010] Furthermore, the connecting member includes an embedded nut and a fixing bolt, the embedded nut is arranged on the top of the raised portion, and the fixing bolt passes through the outer threshold connecting portion and the inner threshold connecting portion and is threadedly connected to the embedded nut.

[0011] Furthermore, pre-compression expansion sealing strips are respectively arranged between the bottom surface of the indoor replaceable threshold and the top surface of the fixed base, between the lower side surface of the inner threshold connecting part and the top surface of the raised part, and between the lower side surface of the outdoor replaceable threshold and the top surface of the fixed base.

[0012] Furthermore, a vertical through hole for passing an expansion screw is opened on the fixing base, and the vertical through hole passes through the raised portion and the fixing base.

[0013] The invention also discloses a construction method for a replaceable threshold of a high-airtightness swing door, which comprises the following steps.

[0014] a. Prefabricated door frame, replaceable indoor threshold and replaceable outdoor threshold, the bottom of the door frame is a fixed base, a raised portion is provided on the top of the fixed base, the length direction of the raised portion is consistent with the length direction of the fixed base, both ends of the fixed base are vertical bars, the fixed base and the vertical bars are sealed and formed, the replaceable indoor threshold and the replaceable outdoor threshold are both in the shape of long strips, an inner threshold connecting portion is provided on the outer side of the replaceable indoor threshold, and an outer threshold connecting portion is provided on the inner side of the replaceable outdoor threshold.

[0015] b. Clean the surface of the door and window opening foundation structure and the door frame surface.

[0016] c. A waterproof vapor barrier membrane and a waterproof breathable membrane are pasted on the sides of the door frame. The waterproof vapor barrier membrane is located on the indoor side, and the waterproof breathable membrane is located on the outdoor side.

[0017] d. Place the door frame at the opening, place pads between the door frame and the base structure of the opening, and use the pads to adjust the door frame so that its horizontality and verticality meet the requirements.

[0018] e. Use expansion bolts to pass through the vertical through holes on the fixing base to fix the fixing base to the ground at the opening, and at the same time use expansion bolts to fix the other three sides of the door frame to the basic structure of the opening.

[0019] f. Fill the gap between the door frame and the opening foundation structure with sealing material.

[0020] g. Seal the waterproof vapor barrier membrane and the waterproof breathable membrane separately to the basic structure of the hole.

[0021] h. Carry out ground surface construction on indoor and outdoor sides.

[0022] i. Clean the fixed base, and install the pre-compression expansion sealing tape on the top surface of the raised portion and the top surfaces of the fixed bases on both sides of the raised portion.

[0023] j. Use connecting parts to install the indoor replaceable threshold and the outdoor replaceable threshold on the fixed base, so that the bottom surface of the indoor replaceable threshold and the top surface of the fixed base are in sealing contact, the lower side surface of the inner threshold connecting part and the top surface of the raised part are in sealing contact, the bottom surface of the outdoor replaceable threshold and the top surface of the fixed base are in sealing contact, and the lower side surface of the outer threshold connecting part and the upper side surface of the inner threshold connecting part are in sealing contact.

[0024] Furthermore, the connecting member includes an embedded nut and a fixing bolt, and when the door frame is prefabricated, the embedded nut is fixedly installed on the raised portion.

[0025] Furthermore, when the door frame is prefabricated, a base outer protective plate is installed on the outer side of the fixed base, and a replaceable threshold outer protective plate is installed on the outer side of the replaceable threshold outdoors.

[0026] The fixed base of the replaceable threshold of the high airtightness swing door of the present invention is provided with an indoor replaceable threshold and an outdoor replaceable threshold, and the indoor replaceable threshold and the outdoor replaceable threshold are respectively located on the inner side and the outer side of the raised portion, and the bottoms of the indoor replaceable threshold and the outdoor replaceable threshold are respectively in sealing contact with the top surface of the fixed base, and the inner threshold connection part of the outer side of the indoor replaceable threshold overlaps the raised portion, and the outer threshold connection part of the outdoor replaceable threshold overlaps the inner threshold connection part, and the outer threshold connection part, the inner threshold connection part and the raised portion are fixedly connected by a connecting piece. The indoor replaceable threshold and the outdoor replaceable threshold are easily damaged parts on the threshold, and can be easily replaced, and the existing building structure layer, insulation layer and base surface will not be damaged during replacement. The installation process is simple and fast, which greatly shortens the construction period of the external door replacement and basically does not affect the normal use of the external door. The replaceable high-airtightness swing door threshold of the present invention has low cost. By replacing local components, the swing door threshold that is easily damaged and has a short life cycle can maintain good airtightness for a long time, effectively reducing energy consumption during building operation and maintenance, and is particularly suitable for passive ultra-low energy consumption buildings.

[0027] The construction method of the replaceable threshold of a high-air-tightness swing door of the present invention prefabricates a door frame including a fixed base, an indoor replaceable threshold and an outdoor replaceable threshold in advance in a factory, so that the installation construction of the door frame and the replaceable threshold can be completed quickly, and the sealing of the door frame and the threshold can be ensured. The fixed base is fixed to the ground by expansion bolts, and the indoor replaceable threshold and the outdoor replaceable threshold are detachably fixed to the fixed base by connecting parts. When the indoor replaceable threshold and the outdoor replaceable threshold are replaced, there is no influence on other components and the structural layer, insulation layer and base surface of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of a replaceable threshold of a high airtightness swing door of the present invention.

[0029] Figure 2 It is a three-dimensional cross-sectional view of the replaceable threshold of the high airtightness swing door of the present invention.

[0030] Figure 3 It is a structural diagram of the corner tongue and groove when the pre-compression expansion belt is installed in the present invention.

[0031] Figure 4 The invention is a structural diagram of the tongue and groove at the corners of the replaceable door sill of the high airtightness swing door after the construction is completed.

[0032] In the figure: 1. fixed base; 2. replaceable threshold on indoor side; 3. replaceable threshold on outdoor side; 4. expansion bolt; 5. fixing bolt; 6. embedded nut; 7. outer protection of base; 8. outer protection plate of replaceable threshold; 9. pre-compression expansion sealing tape; 10. raised part; 11. inner threshold connection part; 12. outer threshold connection part; 13. rubber strip; 14. sealing material; 15. waterproof vapor barrier membrane; 16. waterproof vapor permeable membrane; 17. indoor door lower surface layer; 18. indoor floor fine decoration layer; 19. final finishing surface of indoor decoration; 20. outdoor door lower surface layer; 21. decorative surface; 22. door panel outer protection plate; 23. swing door; 24. mullion; 25. mullion outer protection plate. DETAILED DESCRIPTION

[0033] like Figure 1 , Figure 2 As shown, the replaceable threshold for a high airtightness swing door of the present invention comprises a fixed base 1, which is in the shape of a rectangular strip. A protrusion 10 is provided on the top of the fixed base 1, and the length direction of the protrusion 10 is the same as the length and direction of the fixed base 1. An indoor replaceable threshold 2 and an outdoor replaceable threshold 3 are provided above the fixed base 1. The indoor replaceable threshold 2 is located on the inner side of the fixed base 1, and the outdoor replaceable threshold 3 is located on the outer side of the fixed base 1.

[0034] An inner threshold connection part 11 is provided on the outer side of the replaceable threshold 2 on the indoor side. The inner threshold connection part 11 and the replaceable threshold 2 on the indoor side are of the same length and in the same direction. An outer threshold connection part 12 is provided on the inner side of the replaceable threshold 3 on the outdoor side. The outer threshold connection part 12 and the replaceable threshold 3 on the outdoor side are of the same length and in the same direction. The outer threshold connection part 12 is higher than the inner threshold connection part 11. The replaceable threshold 2 on the indoor side and the replaceable threshold 3 on the outdoor side are stacked on the fixed base 1. The bottom surface of the replaceable threshold 2 on the indoor side is in sealed contact with the top surface of the fixed base 1. The lower side surface of the inner threshold connection part 11 is in sealed contact with the top surface of the protrusion 10. The bottom surface of the replaceable threshold 3 on the outdoor side is in sealed contact with the top surface of the fixed base 1. The lower side surface of the outer threshold connection part 12 is in sealed contact with the upper side surface of the inner threshold connection part 11. The sealed contact can prevent gas from flowing through the contact surface between the fixed base 1, the replaceable threshold 2 on the indoor side and the replaceable threshold 3 on the outdoor side, thereby ensuring air tightness.

[0035] The outer threshold connection part 12, the inner threshold connection part 11 and the raised part 10 are connected and fixed together by a connecting piece. The connecting piece passes through the outer threshold connection part 12 and the inner threshold connection part 11, and then is fixed on the raised part 10, so that the indoor replaceable threshold 2, the outdoor replaceable threshold 3 and the fixed base 1 are fixed as a whole.

[0036] Pre-compression expansion sealing strips 9 are respectively arranged between the bottom surface of the indoor replaceable threshold 2 and the top surface of the fixed base 1, between the lower side surface of the inner threshold connection part 11 and the top surface of the raised part 10, and between the lower side surface of the outdoor replaceable threshold 3 and the top surface of the fixed base 1. Under the action of the connecting member, the outer threshold connection part 12 is pressed on the inner threshold connection part 11, and the inner threshold connection part 11 is pressed on the pre-compression expansion sealing strip 9 on the top of the raised part 10. At the same time, the lower end of the indoor replaceable threshold 2 is pressed on the pre-compression expansion sealing strip 9 located on the inner side, and the lower end of the outdoor replaceable threshold 3 is pressed on the pre-compression expansion sealing strip 9 located on the outer side, thereby forming a sealed contact.

[0037] At the same time, the outer side surface of the indoor replaceable threshold 2 overlaps with the inner side surface of the raised portion 10 and the inner side surface of the outer threshold connection portion 12, and the outer side surface of the inner threshold connection portion 11 overlaps with the outer side surface of the raised portion 10 and the inner side surface of the outdoor replaceable threshold 3. In addition, the inner side surface of the indoor replaceable threshold 2 overlaps with the inner side surface of the fixed base 1, and the outer side surface of the outdoor replaceable threshold 3 overlaps with the outer side surface of the fixed base 1. When the indoor replaceable threshold 2 and the outdoor replaceable threshold 3 are placed on the fixed base 1 and fit together, the positions can be aligned, and the through holes on the outer threshold connection portion 12 and the inner threshold connection portion 11 for passing the connecting piece overlap with the hole position on the raised portion 10 for installing the connecting piece, which is convenient for passing and fixing the connecting piece.

[0038] The top of the outer threshold connection part 12 is higher than the top surface of the outdoor replaceable threshold 3, and the outer side surface of the outer threshold connection part 12 forms a first sealing contact surface in sealing contact with the swing door 23. The indoor replaceable threshold 2 is higher than the outer threshold connection part 12, and the outer side surface of the indoor replaceable threshold 2 forms a second sealing contact surface in sealing contact with the swing door 23. Correspondingly, two downward protruding structures are provided on the outer side of the swing door 23, and rubber strips 13 are installed respectively. When in use, the rubber strips 13 on the two protruding structures are in contact with the first sealing contact surface and the second sealing contact surface respectively, thereby forming two seals to improve the air tightness between the swing door 23 and the replaceable threshold.

[0039] The connecting piece includes an embedded nut 6 and a fixing bolt 5. The embedded nut 6 is arranged on the top of the raised portion 10. The fixing bolt 5 passes through the outer threshold connecting portion 12 and the inner threshold connecting portion 11 and is threadedly connected with the embedded nut 6 in the raised portion 10. A countersunk hole is provided at the position where the fixing bolt 5 passes through the top surface of the outer threshold connecting portion 12. After the fixing bolt 5 passes through the outer threshold connecting portion 12, the inner threshold connecting portion 11 and the raised portion 10, the top end of the fixing bolt 5 is located in the countersunk hole.

[0040] A vertical through hole for inserting an expansion screw is provided on the fixed base 1, and the vertical through hole passes through the raised portion 10 and the fixed base 1. The vertical through hole for inserting the expansion screw and the hole for inserting the connector on the raised portion 10 are staggered with each other in the length direction of the fixed base 1.

[0041] The fixed base 1 of the replaceable threshold of the high airtightness swing door 23 of the present invention is provided with an indoor replaceable threshold 2 and an outdoor replaceable threshold 3, and the indoor replaceable threshold 2 and the outdoor replaceable threshold 3 are respectively located on the inner and outer sides of the raised portion 10, and the bottoms of the indoor replaceable threshold 2 and the outdoor replaceable threshold 3 are respectively in sealing contact with the top surface of the fixed base 1, and the inner threshold connecting portion 11 of the outer side of the indoor replaceable threshold 2 is overlapped on the raised portion 10, and at the same time, the outer threshold connecting portion 12 of the outdoor replaceable threshold 3 is overlapped on the inner threshold connecting portion 11, and the outer threshold connecting portion 12, the inner threshold connecting portion 11 and the raised portion 10 are fixedly connected by a connecting piece.

[0042] The replaceable indoor door sill 2, the replaceable outdoor door sill 3 and the pre-compression expansion sealing strip 9 are easily damaged parts on the door sill and can be easily replaced without damaging the existing building structure layer, insulation layer and base surface. The installation process is simple and fast, which greatly shortens the construction period of the external door replacement and basically does not affect the normal use of the external door.

[0043] like Figure 3 , Figure 4 As shown, the end of the fixed base 1 and the lower end of the vertical bar 24 are tightly connected to form an integrated structure, and three step structures are provided at the corner where the fixed base 1 and the vertical bar 24 are connected. When the pre-compression expansion sealing strip 9 is installed, the ends of the three pre-compression expansion sealing strips 9 extend upward along the surfaces of the three step mechanisms respectively, so that the ends of the indoor replaceable threshold 2, the outdoor replaceable threshold 3, the inner threshold connection part 11 and the outer threshold connection part 12 and the threshold are sealed by the pre-compression expansion sealing strip 9. After the indoor replaceable threshold 2 and the outdoor replaceable threshold 3 are installed, the top surface of the indoor replaceable threshold 2, the top surface of the outer threshold connection part 12 and the top of the outdoor replaceable threshold respectively coincide with the top surfaces of the corresponding steps.

[0044] The invention also discloses a construction method for a replaceable threshold of a high-airtightness swing door, which comprises the following steps.

[0045] a. Prefabricated door frame, replaceable indoor threshold 2 and replaceable outdoor threshold 3, the bottom of the door frame is a fixed base 1, a raised portion 10 is provided on the top of the fixed base 1, the length direction of the raised portion 10 is consistent with the length direction of the fixed base 1, both ends of the fixed base 1 are vertical bars 24, the fixed base 1 and the vertical bars 24 are sealed and formed, the replaceable indoor threshold 2 and the replaceable outdoor threshold 3 are both in the shape of long strips, an inner threshold connecting portion 11 is provided on the outer side of the replaceable indoor threshold 2, and an outer threshold connecting portion 12 is provided on the inner side of the replaceable outdoor threshold 3.

[0046] b. Clean the surface of the door and window opening foundation structure and the door frame surface.

[0047] Clean the door and window openings, ensure that the structural base around the openings is flat and free of sand, and the parts that do not meet the requirements should be smoothed and polished with a plaster layer. Before installing the door frame, clean the dust and attachments on the opening and door frame to ensure that the opening and door frame are clean.

[0048] c. A waterproof vapor barrier film 15 and a waterproof breathable film 16 are pasted on the sides around the door frame. The waterproof vapor barrier film 15 is located on the indoor side, and the waterproof breathable film 16 is located on the outdoor side.

[0049] The waterproof breathable membrane 16 and the waterproof vapor barrier membrane 15 are overlapped and pinched at the four corners of the door frame. At the same time, in order to ensure that the membrane material and the base structure are closely fitted, the width of the membrane material extending is 1.5cm to 2cm.

[0050] d. Place the door frame at the opening, place pads between the door frame and the base structure of the opening, and use the pads to adjust the door frame so that its horizontality and verticality meet the requirements.

[0051] e. Use expansion bolts 4 to pass through the vertical through holes on the fixing base 1 to fix the fixing base 1 to the ground at the opening, and at the same time use expansion bolts 4 to fix the other three sides of the door frame to the basic structure of the opening.

[0052] f. Fill the gap between the door frame and the opening infrastructure with sealing material 14.

[0053] The sealing material 14 may be made of polyurethane foam material.

[0054] g. The waterproof vapor barrier membrane 15 and the waterproof breathable membrane 16 are respectively pasted and sealed to the basic structure of the hole.

[0055] For self-adhesive membrane materials, they are directly pasted on the surface of the base structure. For glue-type membrane materials, the matching adhesive is used to fully adhere them.

[0056] h. Carry out ground surface construction on indoor and outdoor sides.

[0057] Specifically, it includes constructing an outdoor door bottom surface layer 20 on the outdoor ground, laying a decorative surface 21 above the outdoor door bottom surface layer 20, constructing an indoor door bottom surface layer 17 on the indoor ground, and reserving the thickness of the indoor ground fine decoration layer 18, so that the final finished surface 19 of the indoor decoration and the upper surface height of the outdoor decorative surface 21 are roughly the same.

[0058] At this time, the size difference between the door frame and the ground is small, and the ground surface construction is convenient for protecting the finished product. After the ground surface construction is completed, the indoor replaceable threshold 2 and the outdoor replaceable threshold 3 can be installed.

[0059] i. Clean the fixed base 1, and install the pre-compression expansion sealing tape 9 on the top surface of the protrusion 10 and the top surface of the fixed base 1 on both sides of the protrusion 10.

[0060] j. Use connecting parts to install the indoor replaceable threshold 2 and the outdoor replaceable threshold 3 on the fixed base 1, so that the bottom surface of the indoor replaceable threshold 2 and the top surface of the fixed base 1 are in sealing contact, the lower side surface of the inner threshold connecting part 11 and the top surface of the raised part 10 are in sealing contact, the bottom surface of the outdoor replaceable threshold 3 and the top surface of the fixed base 1 are in sealing contact, and the lower side surface of the outer threshold connecting part 12 and the upper side surface of the inner threshold connecting part 11 are in sealing contact.

[0061] After the construction of the replaceable threshold of the high airtightness swing door 23 is completed, the opening leaf of the swing door 23 can be installed.

[0062] The connecting piece includes an embedded nut 6 and a fixing bolt 5. When the door frame is prefabricated, the embedded nut 6 is fixedly installed in the raised portion 10. In this way, when installing the replaceable indoor threshold 2 and the replaceable outdoor threshold 3, it is only necessary to place the replaceable indoor threshold 2 and the replaceable outdoor threshold 3, and then pass the fixing bolt 5 through and tighten the fixing bolt 5 on the embedded nut 6. When replacing the replaceable indoor threshold 2 and the replaceable outdoor threshold 3, the fixing bolt 5 is unscrewed and the corresponding parts are replaced.

[0063] When the door frame is prefabricated, a base outer protective plate 7 is installed on the outer side of the fixed base 1, and a replaceable threshold outer protective plate 8 is installed on the outer side of the replaceable threshold 3 on the outdoor side. A mullion outer protective plate is installed on the outer side of the mullion 24. The base outer protective plate 7 can protect the outer side of the fixed base 1, and the replaceable threshold outer protective plate 8 can protect the outer side of the replaceable threshold 3 on the outdoor side. The door panel outer protective plate 22 is also installed on the outer side of the opening leaf of the casement door 23 installed later.

[0064] The top of the outer threshold connection part 12 is higher than the top surface of the outdoor replaceable threshold 3, and the outer side surface of the outer threshold connection part 12 forms a first sealing contact surface in sealing contact with the swing door 23. The indoor replaceable threshold 2 is higher than the outer threshold connection part 12, and the outer side surface of the indoor replaceable threshold 2 forms a second sealing contact surface in sealing contact with the swing door 23. Correspondingly, two downward protruding structures are provided on the outer side of the swing door 23, and rubber strips 13 are installed respectively. When in use, the rubber strips 13 on the two protruding structures are in contact with the first sealing contact surface and the second sealing contact surface respectively, thereby forming two seals to improve the air tightness between the swing door 23 and the replaceable threshold.

[0065] The construction method of the replaceable threshold of the high-air-tightness swing door 23 of the present invention can quickly complete the installation construction of the door frame and the replaceable threshold by prefabricating the door frame including the fixed base 1, the indoor replaceable threshold 2 and the outdoor replaceable threshold 3 in the factory in advance, and can ensure the sealing of the door frame and the threshold. The fixed base 1 is fixed to the ground by expansion bolts 4, and the indoor replaceable threshold 2 and the outdoor replaceable threshold 3 are detachably fixed to the fixed base 1 by connecting parts. When the indoor replaceable threshold 2 and the outdoor replaceable threshold 3 are replaced, there is no influence on other components and the structural layer, insulation layer and base surface of the building, and the waterproof vapor barrier membrane 15 and the waterproof breathable membrane 16 will not be damaged, thereby extending the service life of other parts.

[0066] The invention has low cost and can maintain good air tightness of the swing door 23 threshold which is easily damaged and has a short life cycle for a long time by replacing local components, effectively reducing energy consumption during building operation and maintenance, and is particularly suitable for passive ultra-low energy consumption buildings.

Claims

1. A replaceable threshold for a high airtightness swing door, characterized in that: A fixed base is provided, a raised portion is provided on the top of the fixed base, the length direction of the raised portion is consistent with the length direction of the fixed base, an indoor replaceable threshold and an outdoor replaceable threshold are provided above the fixed base, an inner threshold connecting portion is provided on the outer side of the indoor replaceable threshold, an outer threshold connecting portion is provided on the inner side of the outdoor replaceable threshold, the bottom surface of the indoor replaceable threshold is in sealing contact with the top surface of the fixed base, the lower side surface of the inner threshold connecting portion is in sealing contact with the top surface of the raised portion, the bottom surface of the outdoor replaceable threshold is in sealing contact with the top surface of the fixed base, the lower side surface of the outer threshold connecting portion is in sealing contact with the upper side surface of the inner threshold connecting portion, and the outer threshold connecting portion, the inner threshold connecting portion and the raised portion are connected and fixed together by a connecting piece; The outer side surface of the indoor replaceable threshold coincides with the inner side surface of the raised portion and the inner side surface of the outer threshold connecting portion, and the outer side surface of the inner threshold connecting portion coincides with the outer side surface of the raised portion and the inner side surface of the outdoor replaceable threshold; The top of the outer threshold connection part is higher than the top surface of the outdoor replaceable threshold, and the outer side surface of the outer threshold connection part forms a first sealing contact surface in sealing contact with the swing door. The indoor replaceable threshold is higher than the outer threshold connection part, and the outer side surface of the indoor replaceable threshold forms a second sealing contact surface in sealing contact with the swing door.

2. The replaceable door sill for a high airtightness swing door according to claim 1, characterized in that: The inner side surface of the indoor replaceable threshold coincides with the inner side surface of the fixed base, and the outer side surface of the outdoor replaceable threshold coincides with the outer side surface of the fixed base.

3. The replaceable door sill for a high airtightness swing door according to claim 1, characterized in that: The connecting member comprises an embedded nut and a fixing bolt, wherein the embedded nut is arranged on the top of the raised portion, and the fixing bolt passes through the outer threshold connecting portion and the inner threshold connecting portion and is threadedly connected with the embedded nut.

4. The replaceable threshold for a high airtightness swing door according to claim 1, characterized in that: Pre-compression expansion sealing strips are respectively arranged between the bottom surface of the indoor replaceable threshold and the top surface of the fixed base, between the lower side surface of the inner threshold connecting part and the top surface of the raised part, and between the lower side surface of the outdoor replaceable threshold and the top surface of the fixed base.

5. The replaceable threshold for a high airtightness swing door according to claim 1, characterized in that: A vertical through hole for passing the expansion screw is opened on the fixing base, and the vertical through hole passes through the raised portion and the fixing base.

6. A construction method for a replaceable threshold of a high airtightness swing door, characterized in that: The following steps are involved: a. Prefabricated door frame, replaceable indoor threshold and replaceable outdoor threshold. The bottom of the door frame is a fixed base. A raised portion is provided on the top of the fixed base. The length direction of the raised portion is consistent with the length direction of the fixed base. Both ends of the fixed base are vertical bars. The fixed base and the vertical bars are sealed. Both the replaceable indoor threshold and the replaceable outdoor threshold are in the shape of long strips. An inner threshold connecting portion is provided on the outer side of the replaceable indoor threshold, and an outer threshold connecting portion is provided on the inner side of the replaceable outdoor threshold. b. Clean the surface of the door and window opening foundation structure and the door frame surface; c. A waterproof vapor barrier membrane and a waterproof breathable membrane are pasted on the sides of the door frame. The waterproof vapor barrier membrane is located on the indoor side, and the waterproof breathable membrane is located on the outdoor side; d. Place the door frame at the opening, place pads between the door frame and the foundation structure of the opening, and use the pads to adjust the door frame so that its horizontality and verticality meet the requirements; e. Use expansion bolts to pass through the vertical through holes on the fixing base to fix the fixing base to the ground at the opening, and use expansion bolts to fix the other three sides of the door frame to the foundation structure of the opening at the same time; f. Fill the gap between the door frame and the opening foundation structure with sealing material; g. Paste and seal the waterproof vapor barrier membrane and the waterproof breathable membrane to the basic structure of the hole respectively; h. Carry out ground surface construction on the indoor and outdoor sides; i. Clean the fixed base, and install the pre-compression expansion sealing tape on the top surface of the raised portion and the top surface of the fixed base on both sides of the raised portion; j. Use connecting parts to install the indoor replaceable threshold and the outdoor replaceable threshold on the fixed base, so that the bottom surface of the indoor replaceable threshold and the top surface of the fixed base are in sealing contact, the lower side surface of the inner threshold connecting part and the top surface of the raised part are in sealing contact, the bottom surface of the outdoor replaceable threshold and the top surface of the fixed base are in sealing contact, and the lower side surface of the outer threshold connecting part and the upper side surface of the inner threshold connecting part are in sealing contact.

7. The construction method of the replaceable threshold of a high airtightness swing door according to claim 6, characterized in that: The connecting piece comprises an embedded nut and a fixing bolt. When the door frame is prefabricated, the embedded nut is fixedly installed on the raised portion.

8. The construction method of the replaceable threshold of a high airtightness swing door according to claim 6, characterized in that: When the door frame is prefabricated, a base outer casing panel is installed on the outer side of the fixed base, and a replaceable threshold outer casing panel is installed on the outer side of the replaceable threshold on the outdoor side.

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