CN214943561U

CN214943561U - Cold-proof door

Info

Publication number: CN214943561U
Application number: CN202120872378.6U
Authority: CN
Inventors: 陈国昌; 原万雅; 张东
Original assignee: Shenyang Ziguang Xinhui Metal Products Co ltd
Current assignee: Shenyang Ziguang Xinhui Metal Products Co ltd
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2021-11-30
Anticipated expiration: 2031-04-26

Abstract

The utility model provides a cold-proof door, relating to the technical field of copper-like doors; first bridge cut-off aluminium, second bridge cut-off aluminium and third bridge cut-off aluminium constitute the door frame structure, and first heat insulating strip, the heat insulating strip of second and third make first bridge cut-off aluminium, second bridge cut-off aluminium and the formation of third bridge cut-off aluminium respectively insulate against heat the cavity, make the door frame structure have good thermal-insulated function, and cavity heat conductivity is less than metallic heat conductivity far away to reduce indoor temperature conduction, guarantee that indoor temperature satisfies the demand. The water retaining strip on the doorsill seals the bottoms of the first door leaf and the second door leaf, and the first sealing strip seals one side of the first door leaf; the second sealing strip seals one side of the second door leaf; the third sealing strip is simultaneously sealed with the tops of the first door leaf and the second door leaf; the fourth sealing strip seals the contact surface of the first door leaf and the second door leaf, the peripheries of the first door leaf and the second door leaf are guaranteed to be in a sealing state, air leakage is avoided, and the function of cooling and heat preservation of the product is achieved.

Description

Cold-proof door

Technical Field

The utility model relates to an imitative copper door technical field particularly, relates to a cold-proof door.

Background

At present, in the related art, the existing copper door structure has poor sealing performance, air leakage between a leaf door and a door frame is most obvious in winter. When the indoor temperature is high and the indoor and outdoor temperature difference is large, the heat conduction is more serious and even the frosting phenomenon is generated. Therefore, it is especially important to design a cold-proof door to improve the sealing effect between the door leaf and the door frame, between the door sill and the two door leaves, to reduce the heat conduction between the indoor and the outdoor, and to ensure the indoor temperature.

SUMMERY OF THE UTILITY MODEL

The present invention aims at least solving one of the technical problems existing in the prior art or the related art.

Therefore, the utility model provides a cold-proof door.

In view of this, the utility model provides a cold-proof door, cold-proof door includes: the door comprises a doorsill, a water retaining strip, first bridge cutoff aluminum, a first sealing strip, second bridge cutoff aluminum, a second sealing strip, third bridge cutoff aluminum, a third sealing strip, a first hinge, a first door leaf, a second hinge, a second door leaf, fourth bridge cutoff aluminum, a fourth sealing strip and a door lock; the threshold is fixed on the ground; the water retaining strip is arranged on the doorsill along the length direction of the doorsill; a first heat insulation strip is arranged in the first bridge-cutoff aluminum, the first bridge-cutoff aluminum is perpendicular to the doorsill, and one end of the first bridge-cutoff aluminum is connected with one end face of the doorsill; the first sealing strip is arranged on the first bridge-cut-off aluminum along the length direction of the first bridge-cut-off aluminum; a second heat insulation strip is arranged in the second bridge-cutoff aluminum, the second bridge-cutoff aluminum is perpendicular to the doorsill, and one end of the second bridge-cutoff aluminum is connected with the other end face of the doorsill; the second sealing strip is arranged on the second bridge-cut-off aluminum along the length direction of the second bridge-cut-off aluminum; a third heat insulation strip is arranged in the third bridge cutoff aluminum, the third bridge cutoff aluminum is parallel to the doorsill, and the third bridge cutoff aluminum is simultaneously connected with the other ends of the first bridge cutoff aluminum and the second bridge cutoff aluminum; the third sealing strip is arranged on the third bridge-cut-off aluminum along the length direction of the third bridge-cut-off aluminum; one ends of at least two first hinges are simultaneously connected with the first bridge-cut-off aluminum; one end of the first door leaf is connected with the other ends of the at least two first hinges, and the first door leaf is attached to the water retaining strip, the first sealing strip and the third sealing strip; one ends of at least two second hinges are simultaneously connected with the second bridge-cut-off aluminum; one end of the second door leaf is connected with the other ends of the at least two second hinges, one end of the second door leaf is rotatably connected with the second bridge-cut-off aluminum, and the second door leaf is simultaneously attached to the water retaining strip, the second sealing strip and the third sealing strip; the fourth bridge-cut aluminum is arranged along the length direction of the first door leaf and connected with the other side of the first door leaf; the fourth sealing strip is arranged on the fourth bridge-cut-off aluminum along the length direction of the fourth bridge-cut-off aluminum, and the fourth sealing strip is attached to the second door leaf; the door lock is fixed on the second door leaf and is connected with the first door leaf.

In the technical scheme, firstly, the threshold is fixed on the ground to improve the stability of the threshold; secondly, the water bar is arranged on the doorsill along the length direction of the doorsill so as to be fixed in the doorsill; thirdly, a first heat insulation strip is arranged in the first bridge-cut-off aluminum, the first bridge-cut-off aluminum is perpendicular to the doorsill, one end of the first bridge-cut-off aluminum is connected with one end face of the doorsill, so that the first bridge-cut-off aluminum is fixed on the doorsill as a door frame, and the door frame has a good heat insulation function and reduces indoor and outdoor temperature conduction through the first heat insulation strip and the first bridge-cut-off aluminum with a hollow inner part; thirdly, the first sealing strip is arranged on the first bridge-cut-off aluminum along the length direction of the first bridge-cut-off aluminum so as to be fixed in the first bridge-cut-off aluminum; thirdly, a second heat insulation strip is arranged in the second bridge-cut-off aluminum, the second bridge-cut-off aluminum is perpendicular to the doorsill, one end of the second bridge-cut-off aluminum is connected with the other end face of the doorsill, so that the second bridge-cut-off aluminum is fixed on the doorsill, and the second heat insulation strip and the second bridge-cut-off aluminum which is hollow inside enable the door frame to have a good heat insulation function and reduce indoor and outdoor temperature conduction; thirdly, a second sealing strip is arranged on the second bridge-cut-off aluminum along the length direction of the second bridge-cut-off aluminum so as to be fixed on the second bridge-cut-off aluminum; thirdly, a third heat insulation strip is arranged in third bridge-cutoff aluminum, the third bridge-cutoff aluminum is parallel to the doorsill and is simultaneously connected with the other ends of the first bridge-cutoff aluminum and the second bridge-cutoff aluminum so as to support and fix the third bridge-cutoff aluminum and combine with the first bridge-cutoff aluminum and the second bridge-cutoff aluminum to form a complete door frame structure, and the door frame has a good heat insulation function, prevents indoor heat from being dissipated and ensures indoor temperature; thirdly, a third sealing strip is arranged on the third bridge-cut-off aluminum along the length direction of the third bridge-cut-off aluminum so as to be fixed; thirdly, one ends of at least two first hinges are simultaneously connected with the first bridge-cut-off aluminum, so that the first hinges are fixed on the first bridge-cut-off aluminum; thirdly, one end of the first door leaf is connected with the other ends of the at least two first hinges at the same time, and the first door leaf is attached to the water blocking strip, the first sealing strip and the third sealing strip at the same time, so that the first door leaf is rotatably connected with the first bridge cutoff aluminum, the flexibility of the first door leaf is improved, the opening and closing of the first door leaf are facilitated, the first door leaf is in contact with the three sealing structures at the same time, the sealing performance of the first door leaf caused by closing is improved, and air leakage is avoided; thirdly, one ends of at least two second hinges are simultaneously connected with the second bridge-cut-off aluminum, so that the second hinges are fixed on the second bridge-cut-off aluminum; thirdly, one end of a second door leaf is connected with the other ends of the at least two second hinges at the same time, one end of the second door leaf is rotatably connected with the second bridge-cut-off aluminum, and the second door leaf is simultaneously attached with the water retaining strip, the second sealing strip and the third sealing strip, so that the second door leaf is rotatably connected with the second bridge-cut-off aluminum, and the second door leaf is also simultaneously attached with the three sealing structures, and no gap is formed when the second door leaf is closed, so that the airtightness of the second door leaf is ensured; thirdly, the fourth bridge-cut aluminum is arranged along the length direction of the first door leaf and is connected with the other side of the first door leaf, so that the fourth bridge-cut aluminum is fixed on the first door leaf and rotates synchronously with the first door leaf; thirdly, a fourth sealing strip is arranged on the fourth bridge-cut aluminum along the length direction of the fourth bridge-cut aluminum and is attached to the second door leaf, so that the first door leaf and the second door leaf are closely attached to each other, and the sealing performance of the clamping position is improved; and thirdly, the door lock is fixed on the second door leaf and connected with the first door leaf so as to lock the second door leaf and the first door leaf and enable the second door leaf to be stably connected with the first door leaf. Adopt this kind of connected mode, simple structure, first bridge cut-off aluminium, second bridge cut-off aluminium and third bridge cut-off aluminium constitute the door frame structure, and first heat insulating strip, the heat insulating strip of second and third make first bridge cut-off aluminium, the heat insulating cavity in second bridge cut-off aluminium and the third bridge cut-off aluminium respectively, make the door frame structure have good thermal-insulated function, and cavity heat conductivity is less than metallic heat conductivity far away to reduce indoor temperature conduction, guarantee that indoor temperature satisfies the demand. The first door leaf and the second door leaf are connected with the door frame through the first hinge and the second hinge respectively, so that the first door leaf and the second door leaf can rotate flexibly, the first door leaf and the second door leaf are locked through the door lock, and the safety of a product is improved. The water retaining strip on the doorsill seals the bottoms of the first door leaf and the second door leaf, and the first sealing strip seals one side of the first door leaf; the second sealing strip seals one side of the second door leaf; the third sealing strip is simultaneously sealed with the tops of the first door leaf and the second door leaf; the fourth sealing strip seals the contact surface of first door leaf and second door leaf, guarantees all be in encapsulated situation around first door leaf and the second door leaf, avoids leaking out, leads to outdoor cool air to get into the room in, realizes that the product separates cold heat retaining function, promotes to use and experiences.

Specifically, the door lock adopts a zinc alloy door lock.

Additionally, the utility model provides an anti-cold door among the above-mentioned technical scheme can also have following additional technical characteristic:

in the above technical solution, preferably, the first door leaf further includes: the first heat-preservation plate, the first protection plate, the first galvanized square tube, the first sealing plate and the first imitation copper plate; the two first protection plates are respectively connected with two sides of the first heat preservation plate; the two first galvanized square tubes are connected with the two ends of the first heat-preservation plate and the two first protection plates simultaneously; the first sealing plate covers the outer side of the first galvanized square pipe, is arranged along the circumferential direction of the first heat-preserving plate and is connected with the first galvanized square pipe; the first copper imitation plate is embedded between the first sealing plate and the first galvanized square tube and is connected with the first sealing plate; wherein, the first sealing plate is connected with the fourth bridge-cut aluminum.

In the technical scheme, the two first protection plates are respectively connected with the two sides of the first heat preservation plate, so that the first heat preservation plate is prevented from being exposed, and the protection function of the first heat preservation plate is realized; the two first galvanized square pipes are connected with the two ends of the first heat-preservation plate and the two first protection plates simultaneously, so that the first galvanized square pipes are fixed; the first sealing plate is arranged on the outer side of the first galvanized square tube in a covering mode, is arranged along the circumferential direction of the first heat-insulating plate and is connected with the first galvanized square tube so as to be prevented from being directly connected with the first heat-insulating plate, the first heat-insulating plate is prevented from being damaged, the connection stability of the first sealing plate is improved, the protection effect on the internal structure is realized, and the first door leaf is more attractive; the first copper imitation plate is embedded between the first sealing plate and the first galvanized square tube and is connected with the first sealing plate, so that the connection strength of the first copper imitation plate is improved, the strength of the first door leaf is improved, and the attractiveness of the first door leaf is ensured; through making first closing plate be connected with fourth bridge cut-off aluminium to it is fixed with fourth bridge cut-off aluminium, improve the stability of fourth bridge cut-off aluminium, thereby realize first door leaf to the spacing and sealed effect of second door leaf.

In the above technical solution, preferably, the cold-proof door further includes: the first plug-in groove, the first mounting plate, the first accommodating groove and the first sealing gasket; the first inserting groove is arranged on the inner wall of the first bridge-cut-off aluminum along the length direction of the first bridge-cut-off aluminum; the at least two first mounting grooves are simultaneously formed in the side wall of the first bridge-cut-off aluminum, and one ends of the at least two first hinges are respectively embedded into the at least two first mounting grooves; the first mounting plate is embedded into the first inserting groove and is simultaneously connected with one ends of at least two first hinges; the first accommodating groove is arranged on the first sealing plate along the length direction of the first sealing plate; the first sealing gasket is embedded into the first accommodating groove, and the first sealing gasket is attached to the other ends of the at least two first hinges simultaneously.

In the technical scheme, the first inserting groove is formed in the inner wall of the first bridge-cut aluminum along the length direction of the first bridge-cut aluminum, the first mounting plate is embedded into the first inserting groove, and the first mounting plate is connected with one end of at least two first hinges at the same time, so that the first hinges are fixed on the first mounting plate; the at least two first mounting grooves are simultaneously arranged on the side wall of the first bridge-cut aluminum, and one ends of the at least two first hinges are respectively embedded into the at least two first mounting grooves, so that the first hinges are accommodated and limited, and the situation that air leaks from a connecting part due to the fact that a gap exists between the first bridge-cut aluminum and a first door leaf due to the fact that the first hinges protrude is avoided; the first containing groove is arranged on the first sealing plate along the length direction of the first sealing plate, the first sealing gasket is embedded into the first containing groove, the first sealing gasket is simultaneously attached to the other ends of the at least two first hinges, air leakage between the first door leaf and the first hinge contact position is avoided, the sealing effect is improved, the influence of the first hinges on the sealing performance of the product is reduced, and the purpose of omnibearing sealing is achieved.

In the above technical solution, preferably, the second door leaf further includes: the second insulation board, the second protection board, the second galvanized square tube, the second sealing board and the second imitation copper plate; the two second protection plates are respectively connected with two sides of the second insulation plate; the two second galvanized square tubes are connected with the two ends of the second heat-insulation plate and the two second protection plates simultaneously; the second sealing plate covers the outer side of the second galvanized square pipe, is arranged along the circumferential direction of the second insulation board and is connected with the second galvanized square pipe; the second copper imitation plate is embedded between the second sealing plate and the second galvanized square tube and is connected with the second sealing plate; and the second sealing plate is attached to the fourth sealing strip.

In the technical scheme, the two second protection plates are respectively connected with the two sides of the second insulation plate, so that the second insulation plate is prevented from being exposed, and the protection function of the second insulation plate is realized; the two second galvanized square pipes are connected with the two ends of the second heat-insulation plate and the two second protection plates simultaneously, so that the second galvanized square pipes are fixed; the second sealing plate is arranged on the outer side of the second galvanized square pipe in a covering mode, is arranged along the circumferential direction of the second heat-insulating plate and is connected with the second galvanized square pipe, so that the second heat-insulating plate is prevented from being directly connected with the second heat-insulating plate, the second heat-insulating plate is prevented from being damaged, the connection stability of the second sealing plate is improved, the protection effect on the internal structure is realized, and the second door leaf is more attractive; the second copper imitation plate is embedded between the second sealing plate and the second galvanized square tube and is connected with the second sealing plate, so that the connection strength of the second copper imitation plate is improved, the strength of the second door leaf is improved, and the attractiveness of the second door leaf is ensured; through making second closing plate and fourth sealing strip laminate mutually to sealed second door leaf and first door leaf contact surface, guarantee the seal of product, reduce indoor heat loss.

In the above technical solution, preferably, the cold-proof door further includes: the second plug-in groove, the second mounting plate, the second accommodating groove and the second sealing gasket; the second inserting groove is arranged on the inner wall of the second bridge-cut-off aluminum along the length direction of the second bridge-cut-off aluminum; the at least two second mounting grooves are simultaneously formed in the side wall of the second bridge-cut-off aluminum, and one ends of the at least two second hinges are respectively embedded into the at least two second mounting grooves; the second mounting plate is embedded into the second inserting groove and is simultaneously connected with one end of at least two second hinges; the second accommodating groove is arranged on the second sealing plate along the length direction of the second sealing plate; the second sealing gasket is embedded into the second accommodating groove, and the second sealing gasket is attached to the other ends of the at least two second hinges simultaneously.

In the technical scheme, the second inserting groove is formed in the inner wall of the second bridge-cut-off aluminum along the length direction of the second bridge-cut-off aluminum, the second mounting plate is embedded into the second inserting groove, and the second mounting plate is simultaneously connected with one end of at least two second hinges so as to fix the second hinges on the second mounting plate; the at least two second mounting grooves are simultaneously formed in the side wall of the second bridge-cut aluminum, and one ends of the at least two second hinges are respectively embedded into the at least two second mounting grooves, so that the second hinges are accommodated and limited, and the situation that air leaks from the connecting part due to the fact that a gap exists between the second bridge-cut aluminum and the second door leaf due to the fact that the second hinges protrude is avoided; the length direction through making the second holding tank follow the second closing plate sets up on the second closing plate to in making the sealed pad embedding second holding tank of second, and the sealed pad of second is laminated with the other end of two at least second hinges simultaneously mutually, in order to avoid second door leaf and second hinge contact position to leak out, improve sealed effect, reduce the influence of second hinge to the product leakproofness, reach all-round sealed purpose.

In the above technical solution, preferably, the threshold further includes: the body, the first limiting part and the second limiting part; the first limiting part is connected with the body and protrudes towards the direction back to the ground; the second limiting part is connected with the first limiting part and protrudes towards the direction back to the ground; wherein, the water bar imbeds in the spacing portion of second, and the water bar is laminated with first closing plate and second closing plate simultaneously.

In the technical scheme, the first limiting part is connected with the body and protrudes in a direction away from the ground so as to limit the first sealing plate and the second sealing plate; be connected with first spacing portion through making the spacing portion of second, the spacing portion of second is protruding to the direction of keeping away from ground, and make in the spacing portion of breakwater embedding second, and the breakwater laminates with first closing plate and second closing plate mutually simultaneously, carry on spacingly with first door leaf and second door leaf, stability when improving first door leaf and second door leaf locking, it is excessive to avoid first door leaf and second door leaf to rotate, realize the sealed technological effect to first door leaf and second door leaf bottom simultaneously, increase the height of first door leaf and second door leaf, avoid outdoor ponding infiltration indoor, promote the use experience of product.

In the above technical solution, preferably, the cold-proof door further includes: the third accommodating groove, the third sealing gasket, the fourth accommodating groove and the fourth sealing gasket; the two third accommodating grooves are respectively arranged on two opposite sides of the first sealing plate along the width direction of the first sealing plate; the two third sealing gaskets are respectively embedded into the two third accommodating grooves, one of the third sealing gaskets is attached to the second limiting part, and the other third sealing gasket is attached to the third bridge-cut-off aluminum; the two fourth accommodating grooves are respectively arranged on two opposite sides of the second sealing plate along the width direction of the second sealing plate; two fourth sealed pad imbed respectively in two fourth holding tanks, one of them fourth sealed pad and the laminating of spacing portion of second, another fourth sealed pad and the laminating of third bridge cut-off aluminium mutually.

In the technical scheme, two third accommodating grooves are respectively arranged on two opposite edges of the first sealing plate along the width direction of the first sealing plate, two third sealing gaskets are respectively embedded into the two third accommodating grooves, one third sealing gasket is attached to the second limiting part, and the other third sealing gasket is attached to the third bridge-cut-off aluminum, so that the accommodating and fixing effects on the third sealing gaskets are realized, and the sealing performance of the first door leaf and the door sill as well as the sealing performance of the first door leaf and the third bridge-cut-off aluminum are enhanced; set up the two opposite side at the second closing plate through the width direction that makes two fourth holding tanks follow the second closing plate respectively, and make two sealed pad imbed respectively in two fourth holding tanks, one of them fourth is sealed to seal up and is laminated with the spacing portion of second, another fourth is sealed to seal up and is laminated with third bridge cut-off aluminium mutually, with the effect of realization to sealed holding and fixing of pad, strengthen the leakproofness between second door fan and third bridge cut-off aluminium and the threshold, thereby further improve the leakproofness of product, realize the product and separate cold heat retaining function.

In the above technical solution, preferably, the first heat insulating strips are PA66 heat insulating strips; the second heat insulation strips are PA66 heat insulation strips; the third heat insulation strip is a PA66 heat insulation strip.

In the technical scheme, the first heat insulation strips, the second heat insulation strips and the third heat insulation strips are PA66 heat insulation strips, so that PA66 is stable in chemical property and is not easy to react with other substances; the melting point is high, and the flame retardance is good; the brittle temperature is low, and the low temperature can not be broken; the shrinkage rate is little, is heated and is difficult for producing the deformation, avoids long-term the back, produces the gap, ensures sealed effect, prolongs the effective service life of product.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic structural view of a cold-proof door according to an embodiment of the present invention;

fig. 2 is a sectional view a-a of the structural schematic diagram of the cold-proof door of fig. 1 according to an embodiment of the present invention;

fig. 3 is a B-B sectional view of the structural schematic diagram of the cold-proof door of fig. 1 according to an embodiment of the present invention;

fig. 4 is an enlarged view of the section at C of the structural schematic view of the cold-proof door of fig. 2 according to an embodiment of the present invention;

fig. 5 is an enlarged view of the section a-a of fig. 2 showing the structure of the cold-proof door according to an embodiment of the present invention;

fig. 6 is an enlarged view of a portion E of a cross-sectional view a-a of the structural schematic diagram of the cold-proof door of fig. 2 according to an embodiment of the present invention;

fig. 7 is an enlarged view of a section at F of a portion B-B of the schematic structural view of the cold-proof door of fig. 3 according to an embodiment of the present invention;

fig. 8 is an enlarged view at G of a B-B cross-sectional view of the structural schematic diagram of the cold-proof door of fig. 3 according to an embodiment of the present invention;

wherein, the correspondence between the reference numbers and the component names in fig. 1 to 8 is:

10 doorsill, 101 body, 102 first limiting part, 103 second limiting part, 12 water bar, 14 first bridge-cut aluminum, 16 first heat insulation bar, 18 first sealing strip, 20 second bridge-cut aluminum, 22 second heat insulation bar, 24 second sealing strip, 26 third bridge-cut aluminum, 28 third heat insulation bar, 30 third sealing strip, 32 first hinge, 34 first door leaf, 341 first heat preservation plate, 342 first protection plate, 343 first zinc-plated square tube, 344 first sealing plate, 345 first copper-like plate, 36 second hinge, 38 second door leaf, 381 second heat preservation plate, 382 second protection plate, 383 second zinc-plated square tube, 384 second sealing plate, 385 second copper-like plate, 40 fourth bridge-cut aluminum, 42 fourth sealing strip, 44 door lock, 46 first inserting groove, 50 first mounting plate, 52 first accommodating groove, 54 first sealing gasket, 56 second inserting groove, 60 second mounting plate, 62 second accommodating groove, 64 second packing, 70 fourth receiving groove, 72 fourth packing.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The cold-proof door according to some embodiments of the present invention is described below with reference to fig. 1 to 8.

In the embodiment of the present invention, as shown in fig. 1 to 8, the present invention provides a cold-proof door, which includes: the door sill comprises a door sill 10, a water bar 12, a first bridge cut-off aluminum 14, a first sealing strip 18, a second bridge cut-off aluminum 20, a second sealing strip 24, a third bridge cut-off aluminum 26, a third sealing strip 30, a first hinge 32, a first door leaf 34, a second hinge 36, a second door leaf 38, a fourth bridge cut-off aluminum 40, a fourth sealing strip 42 and a door lock 44; the threshold 10 is fixed on the ground; the water bar 12 is arranged on the doorsill 10 along the length direction of the doorsill 10; a first heat insulation strip 16 is arranged in the first bridge-cut aluminum 14, the first bridge-cut aluminum 14 is perpendicular to the doorsill 10, and one end of the first bridge-cut aluminum 14 is connected with one end face of the doorsill 10; the first sealing strip 18 is arranged on the first bridge-cut aluminum 14 along the length direction of the first bridge-cut aluminum 14; a second heat insulation strip 22 is arranged in the second bridge-cut aluminum 20, the second bridge-cut aluminum 20 is perpendicular to the threshold 10, and one end of the second bridge-cut aluminum 20 is connected with the other end face of the threshold 10; the second sealing strip 24 is arranged on the second bridge-cut aluminum 20 along the length direction of the second bridge-cut aluminum 20; a third heat insulation strip 28 is arranged in the third bridge-cut aluminum 26, the third bridge-cut aluminum 26 is parallel to the doorsill 10, and the third bridge-cut aluminum 26 is simultaneously connected with the other ends of the first bridge-cut aluminum 14 and the second bridge-cut aluminum 20; the third sealing strip 30 is arranged on the third bridge-cut aluminum 26 along the length direction of the third bridge-cut aluminum 26; one ends of at least two first hinges 32 are simultaneously connected with the first bridge-cut aluminum 14; one end of the first door leaf 34 is connected with the other ends of the at least two first hinges 32, and the first door leaf 34 is attached to the water bar 12, the first sealing strip 18 and the third sealing strip 30; one ends of at least two second hinges 36 are simultaneously connected with the second bridge-cut aluminum 20; one end of the second door leaf 38 is connected with the other ends of the at least two second hinges 36, one end of the second door leaf 38 is rotatably connected with the second bridge-cut-off aluminum 20, and the second door leaf 38 is attached to the water bar 12, the second sealing strip 24 and the third sealing strip 30; the fourth bridge-cut aluminum 40 is arranged along the length direction of the first door leaf 34, and the fourth bridge-cut aluminum 40 is connected with the other side of the first door leaf 34; the fourth sealing strip 42 is arranged on the fourth bridge-cut aluminum 40 along the length direction of the fourth bridge-cut aluminum 40, and the fourth sealing strip 42 is attached to the second door leaf 38; door lock 44 is secured to second door leaf 38 and door lock 44 is coupled to first door leaf 34.

In this embodiment, first, the stability of the rocker 10 is improved by fixing the rocker 10 on the ground; secondly, the water bar 12 is arranged on the doorsill 10 along the length direction of the doorsill 10 so as to fix the water bar 12 in the doorsill 10; thirdly, a first heat insulation strip 16 is arranged in the first bridge-cut aluminum 14, the first bridge-cut aluminum 14 is perpendicular to the doorsill 10, one end of the first bridge-cut aluminum 14 is connected with one end face of the doorsill 10, so that the first bridge-cut aluminum 14 is fixed on the doorsill 10 as a doorframe, and the doorframe has a good heat insulation function and reduces indoor and outdoor temperature conduction through the first heat insulation strip 16 and the first bridge-cut aluminum 14 with a hollow interior; thirdly, the first sealing strip 18 is fixed in the first bridge-cut aluminum 14 by arranging the first sealing strip 18 on the first bridge-cut aluminum 14 along the length direction of the first bridge-cut aluminum 14; thirdly, a second heat insulation strip 22 is arranged in the second bridge-cut aluminum 20, the second bridge-cut aluminum 20 is perpendicular to the doorsill 10, one end of the second bridge-cut aluminum 20 is connected with the other end face of the doorsill 10, so that the second bridge-cut aluminum 20 is fixed on the doorsill 10, and the second heat insulation strip 22 and the second bridge-cut aluminum 20 which is hollow inside enable the door frame to have a good heat insulation function and reduce indoor and outdoor temperature conduction; thirdly, the second sealing strip 24 is fixed on the second bridge-cut aluminum 20 by arranging the second sealing strip 24 on the second bridge-cut aluminum 20 along the length direction of the second bridge-cut aluminum 20; thirdly, a third heat insulation strip 28 is arranged inside a third bridge-cut-off aluminum 26, the third bridge-cut-off aluminum 26 is parallel to the doorsill 10, the third bridge-cut-off aluminum 26 is simultaneously connected with the other ends of the first bridge-cut-off aluminum 14 and the second bridge-cut-off aluminum 20, so that the third bridge-cut-off aluminum 26 is supported and fixed and is combined with the first bridge-cut-off aluminum 14 and the second bridge-cut-off aluminum 20 to form a complete door frame structure, the bridge-cut-off structure is the same, the door frame has a good heat insulation function, indoor heat is prevented from being dissipated, and indoor temperature is guaranteed; thirdly, the third sealing strip 30 is fixed by arranging the third sealing strip 30 on the third bridge-cut aluminum 26 along the length direction of the third bridge-cut aluminum 26; thirdly, the first hinges 32 are fixed on the first bridge-cut aluminum 14 by simultaneously connecting one ends of at least two first hinges 32 with the first bridge-cut aluminum 14; thirdly, one end of the first door leaf 34 is connected with the other ends of the at least two first hinges 32, and the first door leaf 34 is attached to the water blocking strip 12, the first sealing strip 18 and the third sealing strip 30, so that the first door leaf 34 is rotatably connected with the first bridge-cut-off aluminum 14, the flexibility of the first door leaf 34 is improved, opening and closing are facilitated, the first door leaf 34 is in contact with the three sealing structures at the same time, the sealing performance of the first door leaf 34 when the first door leaf 34 is closed is improved, and air leakage is avoided; thirdly, the second hinges 36 are fixed on the second bridge-cut aluminum 20 by simultaneously connecting one ends of at least two second hinges 36 with the second bridge-cut aluminum 20; thirdly, one end of the second door leaf 38 is connected with the other ends of the at least two second hinges 36, one end of the second door leaf 38 is rotatably connected with the second bridge-cut-off aluminum 20, and the second door leaf 38 is simultaneously attached to the water blocking strip 12, the second sealing strip 24 and the third sealing strip 30, so that the second door leaf 38 is rotatably connected with the second bridge-cut-off aluminum 20, and meanwhile, the second door leaf 38 is also simultaneously attached to the three sealing structures, so that no gap is formed when the second door leaf 38 is closed, and the tightness of the second door leaf 38 is ensured; thirdly, the fourth bridge-cut aluminum 40 is arranged along the length direction of the first door leaf 34, and the fourth bridge-cut aluminum 40 is connected with the other side of the first door leaf 34, so that the fourth bridge-cut aluminum 40 is fixed on the first door leaf 34 and rotates synchronously with the first door leaf 34; thirdly, the fourth sealing strip 42 is arranged on the fourth bridge-cut aluminum 40 along the length direction of the fourth bridge-cut aluminum 40, and the fourth sealing strip 42 is attached to the second door leaf 38, so that the first door leaf 34 is closely attached to the second door leaf 38, and the tightness of the clamping position is improved; again, the second door leaf 38 is stably connected to the first door leaf 34 by fixing the door lock 44 to the second door leaf 38 and connecting the door lock 44 to the first door leaf 34 to lock the second door leaf 38 and the first door leaf 34. Adopt this kind of connected mode, moreover, the steam generator is simple in structure, first bridge cut-off aluminium 14, second bridge cut-off aluminium 20 and third bridge cut-off aluminium 26 constitute the door frame structure, first heat insulating strip 16, second heat insulating strip 22 and third heat insulating strip 28 make first bridge cut-off aluminium 14, second bridge cut-off aluminium 20 and third bridge cut-off aluminium 26 form thermal-insulated cavity respectively, make the door frame structure have good thermal-insulated function, cavity heat conductivity is less than metallic heat conductivity far away, in order to reduce the indoor temperature conduction, guarantee that the indoor temperature satisfies the demand. The first door leaf 34 and the second door leaf 38 are connected with the door frame through the first hinge 32 and the second hinge 36 respectively, so that the first door leaf 34 and the second door leaf 38 can flexibly rotate, the first door leaf 34 and the second door leaf 38 are locked through the door lock 44, and the safety of a product is improved. The water bar 12 on the threshold 10 seals the bottoms of the first door leaf 34 and the second door leaf 38, and the first sealing strip 18 seals one side of the first door leaf 34; the second sealing strip 24 seals one side of the second door leaf 38; the third sealing strip 30 seals with the top of both the first door leaf 34 and the second door leaf 38; the fourth sealing strip 42 seals the contact surface of the first door leaf 34 and the second door leaf 38, ensures that the periphery of the first door leaf 34 and the periphery of the second door leaf 38 are all in a sealing state, avoids air leakage, leads outdoor cool air to enter the room, achieves the function of cool insulation of the product, and improves the use experience.

Specifically, the door lock 44 is a zinc alloy door lock.

In an embodiment of the present invention, preferably, as shown in fig. 2 and 4, the first door leaf 34 further includes: a first heat-insulating plate 341, a first protective plate 342, a first galvanized square tube 343, a first sealing plate 344 and a first copper imitation plate 345; the two first protection plates 342 are respectively connected with two sides of the first heat preservation plate 341; the two first galvanized square tubes 343 are connected to both ends of the first heat-insulating plate 341 and the two first protective plates 342; the first sealing plate 344 covers the outer side of the first galvanized square pipe 343, the first sealing plate 344 is arranged along the circumferential direction of the first heat insulating plate 341, and the first sealing plate 344 is connected with the first galvanized square pipe 343; the first copper imitation plate 345 is embedded between the first sealing plate 344 and the first galvanized square tube 343, and the first copper imitation plate 345 is connected with the first sealing plate 344; wherein the first sealing plate 344 is connected to the fourth bridge-cut aluminum 40.

In this embodiment, the two first protection plates 342 are respectively connected to two sides of the first thermal insulation plate 341, so as to prevent the first thermal insulation plate 341 from being exposed, thereby implementing a protection function on the first thermal insulation plate 341; the two first galvanized square pipes 343 are connected to both ends of the first heat-insulating plate 341 and the two first protection plates 342 at the same time to fix the first galvanized square pipes 343; the first sealing plate 344 is arranged outside the first galvanized square tube 343 in a covering manner, the first sealing plate 344 is arranged along the circumferential direction of the first heat-insulating plate 341, and the first sealing plate 344 is connected with the first galvanized square tube 343 to avoid direct connection with the first heat-insulating plate 341, so that the first heat-insulating plate 341 is prevented from being damaged, the connection stability of the first sealing plate 344 is improved, the internal structure is protected, and the first door leaf 34 is more attractive; the first imitation copper plate 345 is embedded between the first sealing plate 344 and the first galvanized square tube 343, and the first imitation copper plate 345 is connected with the first sealing plate 344, so that the connection strength of the first imitation copper plate 345 is improved, the strength of the first door leaf 34 is improved, and the attractiveness of the first door leaf 34 is ensured; the first sealing plate 344 is connected with the fourth bridge-cut aluminum 40 to fix the fourth bridge-cut aluminum 40, so that the stability of the fourth bridge-cut aluminum 40 is improved, and the limiting and sealing effects of the first door leaf 34 on the second door leaf 38 are achieved.

In an embodiment of the present invention, preferably, as shown in fig. 2 and 4, the cold-proof door further includes: the first insertion groove 46, the first mounting groove, the first mounting plate 50, the first receiving groove 52, and the first packing 54; the first inserting groove 46 is arranged on the inner wall of the first bridge-cut aluminum 14 along the length direction of the first bridge-cut aluminum 14; the at least two first mounting grooves are simultaneously formed in the side wall of the first bridge-cut aluminum 14, and one ends of the at least two first hinges 32 are respectively embedded into the at least two first mounting grooves; the first mounting plate 50 is embedded in the first inserting groove 46, and the first mounting plate 50 is simultaneously connected with one end of at least two first hinges 32; the first receiving groove 52 is provided on the first sealing plate 344 along a length direction of the first sealing plate 344; the first gasket 54 is embedded in the first receiving groove 52, and the first gasket 54 is attached to the other ends of the at least two first hinges 32.

In this embodiment, the first hinge 32 is fixed on the first mounting plate 50 by arranging the first insertion groove 46 on the inner wall of the first bridge-cut aluminum 14 along the length direction of the first bridge-cut aluminum 14, embedding the first mounting plate 50 in the first insertion groove 46, and simultaneously connecting the first mounting plate 50 with one end of at least two first hinges 32; the at least two first mounting grooves are simultaneously arranged on the side wall of the first bridge-cut aluminum 14, and one ends of the at least two first hinges 32 are respectively embedded into the at least two first mounting grooves, so that the first hinges 32 are accommodated and limited, and the situation that the first bridge-cut aluminum 14 and the first door leaf 34 have a gap due to the fact that the first hinges 32 are protruded and air leaks at the connecting part is avoided; through making first holding tank 52 set up on first closing plate 344 along the length direction of first closing plate 344 to make first sealed pad 54 imbed in first holding tank 52, and first sealed pad 54 is laminated with the other end of two at least first hinges 32 simultaneously, in order to avoid first door leaf 34 and first hinge 32 contact position to leak out, improve sealed effect, reduce the influence of first hinge 32 to the product leakproofness, reach all-round sealed purpose.

In an embodiment of the present invention, preferably, as shown in fig. 5 to 8, the second door leaf 38 further includes: a second insulation board 381, a second protection board 382, a second galvanized square pipe 383, a second sealing board 384 and a second imitation copper board 385; the two second protection plates 382 are respectively connected with two sides of the second insulation plate 381; the two second galvanized square tubes 383 are connected with the two ends of the second heat-insulating plate 381 and the two second protective plates 382 at the same time; the second sealing plate 384 covers the outer side of the second galvanized square tube 383, the second sealing plate 384 is arranged along the circumferential direction of the second heat insulation plate 381, and the second sealing plate 384 is connected with the second galvanized square tube 383; the second imitation copper plate 385 is embedded between the second sealing plate 384 and the second galvanized square tube 383, and the second imitation copper plate 385 is connected with the second sealing plate 384; wherein the second sealing plate 384 is attached to the fourth sealing strip 42.

In this embodiment, two second protection plates 382 are respectively connected to two sides of the second insulation plate 381, so as to prevent the second insulation plate 381 from being exposed, and thus, the protection function of the second insulation plate 381 is achieved; the two second galvanized square tubes 383 are connected with the two ends of the second heat-insulating plate 381 and the two second protective plates 382 at the same time, so that the second galvanized square tubes 383 are fixed; the second sealing plate 384 is covered on the outer side of the second galvanized square pipe 383, the second sealing plate 384 is arranged along the circumferential direction of the second insulation board 381, and the second sealing plate 384 is connected with the second galvanized square pipe 383 to avoid direct connection with the second insulation board 381, avoid damage to the second insulation board 381, improve the connection stability of the second sealing plate 384, achieve the protection effect on the internal structure, and enable the second door leaf 38 to be more attractive; the second imitation copper plate 385 is embedded between the second sealing plate 384 and the second galvanized square tube 383, and the second imitation copper plate 385 is connected with the second sealing plate 384, so that the connection strength of the second imitation copper plate 385 is improved, the strength of the second door leaf 38 is improved, and the attractiveness of the second door leaf 38 is ensured; the second sealing plate 384 is attached to the fourth sealing strip 42 to seal the contact surface of the second door leaf 38 and the first door leaf 34, so that the tightness of the product is ensured, and indoor heat loss is reduced.

In an embodiment of the present invention, preferably, as shown in fig. 2 and 6, the cold-proof door further includes: the second insertion groove 56, the second mounting groove, the second mounting plate 60, the second receiving groove 62 and the second packing 64; the second inserting groove 56 is arranged on the inner wall of the second bridge-cut aluminum 20 along the length direction of the second bridge-cut aluminum 20; the at least two second mounting grooves are simultaneously formed in the side wall of the second bridge-cut aluminum 20, and one ends of the at least two second hinges 36 are respectively embedded into the at least two second mounting grooves; the second mounting plate 60 is embedded in the second inserting groove 56, and the second mounting plate 60 is simultaneously connected with one end of at least two second hinges 36; the second receiving groove 62 is provided on the second sealing plate 384 in a length direction of the second sealing plate 384; the second gasket 64 is embedded in the second receiving groove 62, and the second gasket 64 is attached to the other ends of the at least two second hinges 36.

In this embodiment, the second hinge 36 is fixed on the second mounting plate 60 by arranging the second inserting groove 56 on the inner wall of the second bridge-cut aluminum 20 along the length direction of the second bridge-cut aluminum 20, embedding the second mounting plate 60 in the second inserting groove 56, and simultaneously connecting the second mounting plate 60 with one end of at least two second hinges 36; the at least two second mounting grooves are simultaneously formed in the side wall of the second bridge-cut aluminum 20, and one ends of the at least two second hinges 36 are respectively embedded into the at least two second mounting grooves, so that the second hinges 36 are accommodated and limited, and the situation that air leaks from the connecting part due to a gap between the second bridge-cut aluminum 20 and the second door leaf 38 caused by the protrusion of the second hinges 36 is avoided; through making second holding tank 62 set up on second closing plate 384 along the length direction of second closing plate 384 to make the second sealed pad 64 imbed in second holding tank 62, and the second sealed pad 64 is laminated with the other end of two at least second hinges 36 simultaneously, in order to avoid second door leaf 38 and second hinge 36 contact position to leak out, improve sealed effect, reduce the influence of second hinge 36 to the product leakproofness, reach all-round sealed purpose.

In an embodiment of the present invention, preferably, as shown in fig. 8, the threshold 10 further includes: a body 101, a first limiting part 102 and a second limiting part 103; the first limiting part 102 is connected with the body 101, and the first limiting part 102 protrudes towards the direction away from the ground; the second limiting part 103 is connected with the first limiting part 102, and the second limiting part 103 protrudes towards the direction away from the ground; the water bar 12 is embedded in the second limiting portion 103, and the water bar 12 is attached to the first sealing plate 344 and the second sealing plate 384.

In this embodiment, by connecting the first position-limiting part 102 to the body 101, the first position-limiting part 102 protrudes away from the ground to limit the position of the first sealing plate 344 and the second sealing plate 384; through making the spacing portion 103 of second be connected with first spacing portion 102, the spacing portion 103 of second is protruding to the direction of keeping away from ground, and make in the spacing portion 103 of breakwater 12 embedding second, and breakwater 12 laminates with first closing plate 344 and second closing plate 384 simultaneously, it is spacing to carry out first door leaf 34 and second door leaf 38, stability when improving first door leaf 34 and second door leaf 38 locking, avoid first door leaf 34 and second door leaf 38 to rotate excessively, realize the sealed technological effect in first door leaf 34 and second door leaf 38 bottom simultaneously, increase the height of first door leaf 34 and second door leaf 38, avoid outer ponding infiltration indoor, promote the use experience of product.

In an embodiment of the present invention, preferably, as shown in fig. 7 and 8, the cold-proof door further includes: a third receiving groove, a third packing, a fourth receiving groove 70, and a fourth packing 72; the two third receiving grooves are respectively disposed on two opposite sides of the first sealing plate 344 along the width direction of the first sealing plate 344; the two third sealing gaskets are respectively embedded into the two third accommodating grooves, one of the third sealing gaskets is attached to the second limiting part 103, and the other third sealing gasket is attached to the third bridge-cut-off aluminum 26; the two fourth receiving grooves 70 are respectively disposed on two opposite sides of the second sealing plate 384 in the width direction of the second sealing plate 384; two fourth sealing gaskets 72 are respectively embedded into the two fourth accommodating grooves 70, one of the fourth sealing gaskets 72 is attached to the second limiting portion 103, and the other fourth sealing gasket 72 is attached to the third bridge-cut-off aluminum 26.

In this embodiment, two third receiving grooves are respectively disposed on two opposite sides of the first sealing plate 344 along the width direction of the first sealing plate 344, and two third sealing gaskets are respectively embedded into the two third receiving grooves, wherein one of the third sealing gaskets is attached to the second limiting portion 103, and the other third sealing gasket is attached to the third bridge-cut aluminum 26, so as to receive and fix the third sealing gaskets, and enhance the sealing performance of the first door leaf 34 and the threshold 10 and the third bridge-cut aluminum 26; the two fourth accommodating grooves 70 are respectively arranged on two opposite sides of the second sealing plate 384 along the width direction of the second sealing plate 384, the two fourth sealing gaskets 72 are respectively embedded into the two fourth accommodating grooves 70, one of the fourth sealing gasket 72 is attached to the second limiting part 103, the other fourth sealing gasket 72 is attached to the third bridge-cut aluminum 26, the fourth sealing gasket 72 is accommodated and fixed, the sealing performance between the second door leaf 38 and the third bridge-cut aluminum 26 as well as the door sill 10 is enhanced, the sealing performance of a product is further improved, and the functions of cooling and heat preservation of the product are realized.

In one embodiment of the present invention, preferably, the first insulating strips 16 are PA66 insulating strips; the second insulating strips 22 are PA66 insulating strips; the third insulating strips 28 are PA66 insulating strips.

In this embodiment, by making the first, second, and third insulating

strips

16, 22, 28 PA66 insulating strips, PA66 is chemically stable and less reactive with other substances; the melting point is high, and the flame retardance is good; the brittle temperature is low, and the low temperature can not be broken; the shrinkage rate is little, is heated and is difficult for producing the deformation, avoids long-term the back, produces the gap, ensures sealed effect, prolongs the effective service life of product.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In the present disclosure, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cold-proof door, comprising:

the doorsill is fixed on the ground;

the water retaining strip is arranged on the doorsill along the length direction of the doorsill;

the first heat insulation strip is arranged inside the first bridge-cutoff aluminum, the first bridge-cutoff aluminum is perpendicular to the doorsill, and one end of the first bridge-cutoff aluminum is connected with one end face of the doorsill;

the first sealing strip is arranged on the first bridge-cut-off aluminum along the length direction of the first bridge-cut-off aluminum;

a second heat insulation strip is arranged inside the second bridge-cutoff aluminum, the second bridge-cutoff aluminum is perpendicular to the doorsill, and one end of the second bridge-cutoff aluminum is connected with the other end face of the doorsill;

the second sealing strip is arranged on the second bridge-cut-off aluminum along the length direction of the second bridge-cut-off aluminum;

a third bridge-cutoff aluminum, wherein a third heat-insulating strip is arranged inside the third bridge-cutoff aluminum, the third bridge-cutoff aluminum is parallel to the doorsill, and the third bridge-cutoff aluminum is simultaneously connected with the other ends of the first bridge-cutoff aluminum and the second bridge-cutoff aluminum;

the third sealing strip is arranged on the third bridge-cut-off aluminum along the length direction of the third bridge-cut-off aluminum;

one ends of at least two first hinges are simultaneously connected with the first bridge-cut-off aluminum;

one end of the first door leaf is connected with the other ends of the at least two first hinges, and the first door leaf is attached to the water retaining strip, the first sealing strip and the third sealing strip;

one ends of at least two second hinges are simultaneously connected with the second bridge-cut-off aluminum;

one end of the second door leaf is connected with the other ends of the at least two second hinges at the same time, one end of the second door leaf is rotatably connected with the second bridge-cut-off aluminum, and the second door leaf is simultaneously attached to the water retaining strip, the second sealing strip and the third sealing strip;

the fourth bridge-cut aluminum is arranged along the length direction of the first door leaf and is connected with the other side of the first door leaf;

the fourth sealing strip is arranged on the fourth bridge-cut-off aluminum along the length direction of the fourth bridge-cut-off aluminum, and the fourth sealing strip is attached to the second door leaf;

and the door lock is fixed on the second door leaf and is connected with the first door leaf.

2. The cold-proof door of claim 1, wherein the first leaf further comprises:

a first heat-insulating plate;

the two first protection plates are respectively connected with two sides of the first heat preservation plate;

the two first galvanized square tubes are connected with the two ends of the first heat-preservation plate and the two first protection plates simultaneously;

the first sealing plate covers the outer side of the first galvanized square pipe, is arranged along the circumferential direction of the first heat-preserving plate and is connected with the first galvanized square pipe;

the first copper imitation plate is embedded between the first sealing plate and the first galvanized square tube and is connected with the first sealing plate;

wherein the first sealing plate is connected with the fourth bridge-cut aluminum.

3. The cold-proof door of claim 2, further comprising:

the first plug-in groove is arranged on the inner wall of the first bridge-cut-off aluminum along the length direction of the first bridge-cut-off aluminum;

the at least two first mounting grooves are simultaneously arranged on the side wall of the first bridge-cut-off aluminum, and one ends of the at least two first hinges are respectively embedded into the at least two first mounting grooves;

the first mounting plate is embedded into the first inserting groove and is simultaneously connected with one ends of at least two first hinges;

the first accommodating groove is formed in the first sealing plate along the length direction of the first sealing plate;

the first sealing gasket is embedded into the first accommodating groove, and the first sealing gasket is attached to the other end of the first hinge at the same time.

4. The cold-proof door of claim 3, wherein the second door leaf further comprises:

a second insulation board;

the two second protection plates are respectively connected with two sides of the second insulation plate;

the two second galvanized square tubes are simultaneously connected with the two ends of the second heat-insulation plate and the two second protection plates;

the second sealing plate covers the outer side of the second galvanized square pipe, is arranged along the circumferential direction of the second insulation board and is connected with the second galvanized square pipe;

the second copper imitation plate is embedded between the second sealing plate and the second galvanized square tube and is connected with the second sealing plate;

and the second sealing plate is attached to the fourth sealing strip.

5. The cold-proof door of claim 4, further comprising:

the second plug-in groove is arranged on the inner wall of the second bridge-cut-off aluminum along the length direction of the second bridge-cut-off aluminum;

at least two second mounting grooves are simultaneously formed in the side wall of the second bridge-cut-off aluminum, and one ends of at least two second hinges are respectively embedded into the at least two second mounting grooves;

the second mounting plate is embedded into the second inserting groove and is simultaneously connected with one end of at least two second hinges;

a second receiving groove provided on the second sealing plate along a length direction of the second sealing plate;

the second is sealed to fill up, the embedding of second sealed pad in the second holding tank, just the second sealed pad is simultaneously with at least two the laminating is held to the other end of second hinge.

6. The cold-proof door of claim 5, wherein the door sill further comprises:

a body;

the first limiting part is connected with the body and protrudes towards the direction back to the ground;

the second limiting part is connected with the first limiting part and protrudes towards the direction back to the ground;

the water bar is embedded into the second limiting part and is simultaneously attached to the first sealing plate and the second sealing plate.

7. The cold-proof door of claim 6, further comprising:

the two third accommodating grooves are respectively arranged on two opposite edges of the first sealing plate along the width direction of the first sealing plate;

the two third sealing gaskets are respectively embedded into the two third accommodating grooves, one of the third sealing gaskets is attached to the second limiting part, and the other third sealing gasket is attached to the third bridge-cut-off aluminum;

the two fourth accommodating grooves are respectively arranged on two opposite edges of the second sealing plate along the width direction of the second sealing plate;

and the two fourth sealing gaskets are respectively embedded into the two fourth accommodating grooves, one of the four sealing gaskets is attached to the second limiting part, and the other one of the four sealing gaskets is attached to the third bridge-cut-off aluminum.

8. A cold-proof door according to any one of claims 1 to 7, wherein:

the first heat insulation strips are PA66 heat insulation strips;

the second heat insulation strips are PA66 heat insulation strips;

the third heat insulation strips are PA66 heat insulation strips.