CN215056816U - Steel sound-proof heat-insulation fireproof door - Google Patents

Steel sound-proof heat-insulation fireproof door Download PDF

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Publication number
CN215056816U
CN215056816U CN202120553083.2U CN202120553083U CN215056816U CN 215056816 U CN215056816 U CN 215056816U CN 202120553083 U CN202120553083 U CN 202120553083U CN 215056816 U CN215056816 U CN 215056816U
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China
Prior art keywords
fireproof
groove
plate
outer plate
heat insulating
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CN202120553083.2U
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Chinese (zh)
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李更
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Beijing Jcc Door And Window Co ltd
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Beijing Jcc Door And Window Co ltd
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Priority to CN202120553083.2U priority Critical patent/CN215056816U/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/24Structural elements or technologies for improving thermal insulation
    • Y02A30/249Glazing, e.g. vacuum glazing
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B80/00Architectural or constructional elements improving the thermal performance of buildings
    • Y02B80/22Glazing, e.g. vaccum glazing

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Abstract

The application relates to a steel gives sound insulation and insulates against heat and prevents fire door, include the door frame and set up the inside casing in the door frame, the inside casing includes the planking and installs the built-in plate group in the planking, the inside of planking sets up to the cavity, the open-top of planking just sets up with the cavity intercommunication, the built-in plate group is including the relative vacuum glass who sets up and set up the fire prevention piece between vacuum glass, vacuum glass pastes with the inboard wall of planking respectively, inserts at the planking top and is equipped with the closing cap board, the closing cap board links to each other with the planking through the installation component. It can be convenient for improve fire-retardant, thermal-insulated effect of preventing fire door.

Description

Steel sound-proof heat-insulation fireproof door
Technical Field
The application relates to the technical field of emergency exits, in particular to a steel sound-insulation heat-insulation fireproof door.
Background
The fireproof door is used for maintaining the fire-resistant integrity of a fire passage and providing an escape way, and aims to ensure that people who are escaping from the fire passage are protected from being threatened by fire in a safe escape time, including blocking dense smoke and heat, and the conventional fireproof door can slow down the spread of fire in the safe escape time.
However, the main body material of the fire door in the prior related technical scheme is mostly formed by wood material plywood and metal plates, and the wood material of the fire door in the structure is too much, so that the problems of flame retardance and poor heat insulation effect exist.
SUMMERY OF THE UTILITY MODEL
In order to facilitate improving the fire-retardant, thermal-insulated effect of preventing fire door, the application provides a steel sound insulation prevents heat and prevents fire door.
The application provides a steel gives sound insulation and insulates against heat prevents fire door adopts following technical scheme:
the utility model provides a steel gives sound insulation and insulates against heat prevents fire door, includes the door frame and sets up the inside casing in the door frame, the inside casing includes the planking and installs the built-in plate group in the planking, the inside of planking sets up to the cavity, the open-top of planking just sets up with the cavity intercommunication, the built-in plate group is including the relative vacuum glass who sets up and set up the fire prevention piece between vacuum glass, vacuum glass pastes with the inside wall of planking respectively mutually, inserts at the planking top and is equipped with the closing cap board, the closing cap board passes through the installation component and links to each other with the planking.
Through adopting above-mentioned technical scheme, install vacuum glass in the planking, vacuum glass plays thermal-insulated fire-retardant function, still sets up the fire prevention piece simultaneously between two relative vacuum glass that set up, and the setting of fire prevention piece has further improved the fire prevention function of planking, can realize improving fire-retardant, thermal-insulated effect of preventing fire door from this.
The present application may be further configured in a preferred example to: the fireproof piece comprises fireproof hollow plates which are attached to the opposite side walls of the vacuum glass respectively.
Through adopting above-mentioned technical scheme, the fire prevention piece adopts the hollow core slab of fire prevention, can improve the fire behavior of planking, sets up to the hollow weight that can alleviate the hollow core slab of fire prevention simultaneously, is convenient for transport and installation.
The present application may be further configured in a preferred example to: a supporting framework is installed in the fireproof hollow slab, and fireproof materials are filled in the supporting framework.
Through adopting above-mentioned technical scheme, installation supporting framework in the hollow slab of preventing fires can improve the intensity of the hollow slab of preventing fires, both can realize from this that the hollow slab of preventing fires has certain intensity and can alleviate the weight of the hollow slab of preventing fires again, packs fire prevention material in supporting framework, can further improve the fire behavior of the hollow slab of preventing fires.
The present application may be further configured in a preferred example to: the fireproof material is rock wool.
Through adopting above-mentioned technical scheme, rock wool has excellent fire prevention heat preservation characteristic.
The present application may be further configured in a preferred example to: the two ends of the top end of the outer plate are respectively provided with an inserting groove, one side of the sealing cover plate, which is attached to the top end of the outer plate, is fixedly provided with an inserting column matched with the inserting groove, and the inserting column is inserted into the inserting groove.
By adopting the technical scheme, when the sealing cover is covered at the top end of the outer plate, the plugging columns on the sealing cover are matched with the plugging grooves, so that the sealing cover can be preliminarily covered at the top end of the outer plate, and meanwhile, the plugging columns and the plugging grooves have a positioning function, and the accuracy of the sealing cover in the sealing cover process can be ensured.
The present application may be further configured in a preferred example to: the lateral wall indent of inserting groove has hidden groove, the installation component sets up in hiding the locating pin of inslot including sliding, the outer wall connection of grafting post has the butt ring of pasting mutually with the locating pin, the locating pin deviates from the one end of hiding the notch of groove and hides the groove and be connected with the compression elastic component between its diapire relative with the notch, when compression elastic component is under natural state, the tip of locating pin is located the inserting groove.
Through adopting above-mentioned technical scheme, the spliced pole is pegging graft in the in-process of inserting groove, make the locating pin slide toward hiding the inslot through the effect of external force, do not interfere until the tip of locating pin to the insertion of spliced pole, the tip butt of up to the spliced pole is in the tank bottom of inserting groove, remove the exogenic action to the locating pin this moment, the locating pin is under the elastic force effect of compression elastic component, the locating pin can be automatic slides toward the inserting groove from hiding the inslot, the locating pin roll-off is located the top position department of butt joint ring to the tip in the inserting groove, through the limiting displacement of locating pin to butt joint ring, can prevent that the spliced pole from deviating from the inserting groove, realize the fixed closing cap of closing cap board on the top of planking from this.
The present application may be further configured in a preferred example to: the end part of the plugging column, which is far away from the sealing cover plate, is set to be a first inclined plane, the end part of the positioning pin, which is positioned in the plugging groove, is set to be a second inclined plane, and the first inclined plane and the second inclined plane are mutually attached.
Through adopting above-mentioned technical scheme, the in-process of inserting in the inserting groove is pegged graft to the grafting post, and the first inclined plane on the end of the grafting post pastes with the second inclined plane on the locating pin tip earlier mutually, and under the continuous extrusion effort through the grafting post, the locating pin can be automatic to sliding in hiding the groove, can operate the locating pin without increasing extra external force from this, and it is more simple and convenient to install.
The present application may be further configured in a preferred example to: the compression spring comprises a compression spring.
Through adopting above-mentioned technical scheme, compression spring's simple structure, simple to operate.
The present application may be further configured in a preferred example to: the periphery wall circumference of locating pin has set firmly the solid fixed ring who is located hidden inslot, gu fixed ring's periphery wall and the interior wall in hidden groove are laminated mutually and are set up, compression spring cover locate on the locating pin and one end and solid fixed ring fixed connection, the other end and the diapire fixed connection who hides the groove.
Through adopting above-mentioned technical scheme, the locating pin is at the in-process that slides toward hiding the inslot, and the locating pin extrudees compression spring through the retaining ring, adopts the retaining ring to extrude compression spring, can increase the area of contact between retaining ring and the compression spring to do benefit to the extrusion dynamics to compression spring.
The present application may be further configured in a preferred example to: and a fireproof expansion sealing strip is arranged at the joint of the outer plate and the door frame.
Through adopting above-mentioned technical scheme, the fire prevention inflation sealing strip that sets up in the junction of outer panel and door frame can be so that the fire prevention inflation sealing strip expands rapidly when meetting fire, improves the leakproofness, effective separation smog.
In summary, the present application includes at least one of the following beneficial technical effects:
1. vacuum glass is arranged in the outer plate, the vacuum glass has the functions of heat insulation and flame retardance, and meanwhile, a fireproof piece is arranged between the two pieces of vacuum glass which are oppositely arranged, so that the fireproof function of the outer plate is further improved, and the flame retardant and heat insulation effects of the fireproof door can be improved;
2. the locating pin is at the in-process that slides toward hiding the inslot, and the locating pin extrudees compression spring through the retaining ring, adopts the retaining ring to extrude compression spring, can increase the area of contact between retaining ring and the compression spring to do benefit to the extrusion dynamics to compression spring.
Drawings
Fig. 1 is a schematic structural view of a steel soundproof and heat insulating fireproof door according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of an embodiment of the present application showing an inner frame;
FIG. 3 is a schematic cross-sectional view showing the corner positions of the top of the innerframe in an embodiment of the present application;
fig. 4 is an enlarged view of a portion a in fig. 3.
In the figure, 1, a door frame; 2. an inner frame; 21. an outer plate; 211. an explosion-proof plate; 212. a base plate; 213. a fire-proof sound-proof plate; 22. a built-in plate group; 221. vacuum glass; 222. a fire-proof hollow slab; 2221. a support framework; 3. a side dam; 4. rock wool; 5. sealing the cover plate; 51. inserting the column; 511. a plug-in connector; 5111. a first inclined plane; 6. inserting grooves; 61. hiding the groove; 611. a limiting ring; 7. mounting the component; 71. positioning pins; 711. a fixing ring; 712. a second inclined plane; 72. a compression spring; 73. a butting ring; 8. fire-proof expansion sealing strip.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
The embodiment of the application discloses steel gives sound insulation and insulates against heat and prevents fire door, refer to fig. 1, 2, including door frame 1 and inside casing 2, inside casing 2 and door frame 1's inside looks adaptation, inside casing 2 includes planking 21 and built-in plate group 22, and the vertical setting of planking 21 and the inside of planking 21 set up to the cavity, and the upper end opening of planking 21 just leads to the setting in with the cavity, and built-in plate group 22 sets up in the cavity of planking 21.
Referring to fig. 1 and 2, the outer panel 21 includes an explosion-proof panel 211, a bottom panel 212 and a fireproof sound-insulating panel 213, the bottom panel 212 is disposed in the door frame 1 in a rectangular shape and horizontally, the explosion-proof panel 211 and the fireproof sound-insulating panel 213 are disposed along the width direction of the bottom panel 212 at intervals, the explosion-proof panel 211 and the fireproof sound-insulating panel 213 are vertically disposed and respectively fixedly connected to ends of two sides of the bottom panel 212, and the lengths of the bottoms of the explosion-proof panel 211 and the fireproof sound-insulating panel 213 are the same as the length of the bottom panel 212. The side baffles 3 are fixedly arranged at the positions of the two ends of the bottom plate 212 in the length direction respectively, the height of each side baffle 3 is consistent with that of the explosion-proof plate 211 and the fireproof sound-insulating plate 213, and the two sides of each side baffle 3 are fixedly connected with the explosion-proof plate 211 and the fireproof sound-insulating plate 213 respectively.
Referring to fig. 1 and 2, a flame retardant paint layer is uniformly coated on one side of the explosion-proof panel 211, which is away from the fireproof acoustic panel 213, and one side of the protective acoustic panel, which is away from the explosion-proof panel 211.
Referring to fig. 2, the inner panel group 22 includes two vacuum glasses 221 and a fireproof member, the two vacuum glasses 221 are disposed opposite to each other, the two vacuum glasses 221 are disposed corresponding to the explosion-proof plate 211 and the fireproof sound insulation plate 213, one side of one vacuum glass 221 is disposed to be attached to the inner side of the explosion-proof plate 211, one side of the other vacuum glass 221 is disposed to be attached to the inner side of the fireproof sound insulation plate 213, and the height of the vacuum glass 221, the height of the explosion-proof plate 211, and the height of the fireproof sound insulation plate 213 are consistent.
Referring to fig. 2, the fire-proof member is disposed between two vacuum glasses 221, the fire-proof member includes a fire-proof hollow plate 222, the height of the fire-proof hollow plate 222 is the same as that of the vacuum glasses 221, and two opposite sides of the fire-proof hollow plate 222 are respectively attached to one opposite sides of the two vacuum glasses 221. A support framework 2221 is fixedly installed in the fireproof hollow slab 222, the support framework 2221 is made of iron grid ribs, and fireproof materials of rock wool 4 are filled in the support framework 2221. The strength of the fire-resistant hollow slab 222 is enhanced by the provision of the support frame 2221.
Referring to fig. 2 and 3, a closing plate 5 is provided at the top end of the outer panel 21, and the opening at the top end of the outer panel 21 is closed by the closing plate 5.
Referring to fig. 2 and 4, two inserting grooves 6 are respectively formed in the top of the explosion-proof board 211 and the top of the fireproof sound-insulating board 213, the two inserting grooves 6 are arranged at intervals along the length direction of the explosion-proof board 211 or the fireproof sound-insulating board 213, the inserting grooves 6 extend along the height direction of the explosion-proof board 211 or the fireproof sound-insulating board 213, and the cross section of the inserting grooves 6 is circular.
Referring to fig. 2 and 4, four plugging columns 51 are fixedly disposed on one side of the sealing cover plate 5 facing the explosion-proof plate 211 and the fireproof sound insulation plate 213, the four plugging columns 51 are perpendicular to the sealing cover plate 5, and the four plugging columns 51 are arranged in a rectangular array and are in one-to-one correspondence with the four plugging grooves 6. When the cover 5 is attached to the upper ends of the explosion-proof board 211 and the fireproof sound insulation board 213, the inserting column 51 is inserted into the inserting groove 6. The fixing of the cover 5 to the top ends of the explosion-proof 211 and the fire-proof soundproof 213 is primarily achieved by inserting the inserting column 51 into the inserting groove 6.
Referring to fig. 2 and 4, a mounting assembly 7 is arranged between the cover plate 5 and the insertion groove 6, the mounting assembly 7 is used for fixing the cover plate 5 on the explosion-proof plate 211 and the fireproof sound insulation plate 213, the mounting assembly 7 comprises a positioning pin 71, a compression spring 72 and an abutting ring 73, two hidden grooves 61 are symmetrically formed in the side wall of the insertion groove 6, the notches of the two hidden grooves 61 are oppositely arranged, the positioning pin 71 is arranged in two, the two positioning pins 71 and the two hidden grooves 61 are arranged in a one-to-one correspondence manner, and the positioning pin 71 is slidably arranged in the hidden grooves 61.
Referring to fig. 4, the abutting ring 73 is fixedly connected to the outer circumferential wall of the inserting column 51, and when the inserting column 51 is inserted into the inserting groove 6, the outer circumferential wall of the abutting ring 73 is attached to the inner circumferential wall of the inserting groove 6, and the positioning pin 71 slides out of the hidden groove 61 and is attached to the upper surface of the abutting ring 73. The limit action of the positioning pin 71 on the abutting ring 73 prevents the plug column 51 from being released after being plugged into the plugging slot 6.
Referring to fig. 4, a fixing ring 711 is fixedly arranged on the outer circumferential wall of the positioning pin 71 in the circumferential direction, the outer circumferential wall of the fixing ring 711 is attached to the inner circumferential wall of the hidden groove 61, the compression spring 72 is sleeved on the positioning pin 71 and located between the fixing ring 711 and the groove bottom of the hidden groove 61, one end of the compression spring 72 is fixedly connected with the fixing ring 711, the other end of the compression spring 72 is fixedly connected with the bottom wall of the hidden groove 61 opposite to the groove opening, and when the compression spring 72 is in a natural state, one end of the positioning pin 71 is located in the insertion groove 6, and the other end of the positioning pin 71 is located in the hidden groove 61 and is spaced from the groove bottom of the hidden groove 61. By applying an acting force to the positioning pin 71, the positioning pin 71 slides into the hidden groove 61, the positioning pin 71 presses the compression spring 72 through the fixing ring 711 while sliding until the positioning pin 71 completely enters the hidden groove 61, at this time, the plugging column 51 is plugged into the plugging groove 6 until the end of the plugging column 51 abuts against the bottom of the plugging groove 6, and at this time, the positioning pin 71 slides in the direction of the plugging groove 6 under the action of the compression spring 72 and is attached to the upper surface of the abutting ring 73.
Referring to fig. 4, a limiting ring 611 is fixedly disposed in the hidden groove 61, an outer circumferential wall of the limiting ring 611 is attached to an inner circumferential wall of the hidden groove 61, the limiting ring 611 and the fixing ring 711 are attached to each other and disposed on a side of the fixing ring 711 away from the compression spring 72, a sliding hole is disposed at a middle position of the limiting ring 611, the sliding hole is adapted to the positioning pin 71, and an end of the positioning pin 71 is disposed in the sliding hole of the limiting ring 611 in a penetrating manner and slidably connected to the limiting ring 611.
Referring to fig. 4, a plug 511 is integrally formed at an end of the plug 51 away from the cover plate 5, the plug 511 is shaped as a trapezoid, a cross section of an upper surface of the plug 511 is larger than a cross section of a lower surface thereof, the upper surface of the plug 511 is fixedly connected with the end of the plug 51, and a waist of the plug 511 is provided as a first inclined face 5111. The end of the positioning pin 71 in the insertion groove 6 is provided with a second inclined surface 712, and the first inclined surface 5111 and the second inclined surface 712 are attached to each other. When the plug 511 is plugged into the plugging slot 6, the first inclined face 5111 of the plug 511 will first adhere to the second inclined face 712 of the positioning pin 71 and exert an acting force synchronously, so as to slide the positioning pin 71 into the hidden slot 61.
Referring to fig. 2, roof and diapire position punishment in the door frame 1 are provided with fire prevention expansion seal strip 8 respectively, and planking 21 rotates to laminating setting each other with fire prevention expansion seal strip 8 when in door frame 1.
The implementation principle of the embodiment is as follows: when the inner plate group 22 is installed, the vacuum glass 221 and the fire-proof hollow plate 222 are inserted into the cavity from the opening of the outer plate 21, at this time, the plug-in post 51 on the cover plate 5 is aligned with the plug-in groove 6 on the top of the explosion-proof plate 211 and the fire-proof sound insulation plate 213, the plug-in post 51 is plugged into the plug-in groove 6, during the plugging process, the first inclined face 5111 on the plug-in post 511 is firstly attached to the second inclined face 712 on the end of the positioning pin 71, the positioning pin 71 slides into the hidden groove 61 by the continuous extrusion of the plug-in post 51, at the same time, the positioning pin 71 drives the fixing ring 711 to extrude the compression spring 72, so that the compression spring 72 is deformed until the end of the plug-in post 51 abuts against the bottom of the plug-in groove 6, at this time, the first inclined face 5111 of the plug-in post 511 is separated from the second inclined face 712 of the positioning pin 71, the positioning pin 71 is under the elastic force of the compression spring 72, the end of the positioning pin 71 slides out of the hidden groove 61 and is attached to the upper surface of the abutting ring 73, and the insertion column 51 is prevented from being separated from the insertion groove 6 by the limiting effect of the positioning pin 71 on the abutting ring 73, so that the sealing cover plate 5 is fixedly mounted on the internal plate group 22.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. The utility model provides a steel gives sound insulation and insulates against heat prevents fire door, includes door frame (1) and sets up inside casing (2) in door frame (1), its characterized in that: the inner frame (2) comprises an outer plate (21) and a built-in plate group (22) arranged in the outer plate (21), a cavity is formed in the outer plate (21), the top opening of the outer plate (21) is communicated with the cavity, the built-in plate group (22) comprises vacuum glass (221) which is arranged oppositely and a fireproof piece which is arranged between the vacuum glass (221), the vacuum glass (221) is attached to the inner side wall of the outer plate (21) respectively, a sealing cover plate (5) is inserted at the top end of the outer plate (21), and the sealing cover plate (5) is connected with the outer plate (21) through an installation assembly (7).
2. The steel soundproof and heat insulating fireproof door according to claim 1, wherein: the fireproof piece comprises fireproof hollow plates (222), and the fireproof hollow plates (222) are respectively attached to opposite side walls of the vacuum glass (221).
3. The steel soundproof and heat insulating fireproof door according to claim 2, wherein: a support framework (2221) is installed in the fireproof hollow slab (222), and fireproof materials are filled in the support framework (2221).
4. A steel soundproof and heat insulating fire door as claimed in claim 3, characterized in that: the fireproof material is rock wool (4).
5. The steel soundproof and heat insulating fireproof door according to claim 1, wherein: the two ends of the top end of the outer plate (21) are respectively provided with an inserting groove (6), the sealing cover plate (5) is fixedly provided with an inserting column (51) matched with the inserting groove (6) on one side of the top end of the outer plate (21), and the inserting column (51) is inserted into the inserting groove (6).
6. The steel soundproof and heat insulating fireproof door according to claim 5, wherein: the side wall indent of inserting groove (6) has hidden groove (61), installation component (7) are including sliding setting in locating pin (71) of hiding groove (61), the outer wall connection of grafting post (51) has butt ring (73) of pasting mutually with locating pin (71), locating pin (71) deviate from one side of the notch of hidden groove (61) and hide groove (61) and be connected with the compression elastic component between its diapire relative with the notch, when compression elastic component is under natural state, the tip of locating pin (71) is located inserting groove (6).
7. The steel soundproof and heat insulating fireproof door according to claim 6, wherein: the end part, far away from the sealing cover plate (5), of the plug column (51) is provided with a first inclined surface (5111), the end part, located in the plug groove (6), of the positioning pin (71) is provided with a second inclined surface (712), and the first inclined surface (5111) and the second inclined surface (712) are mutually attached.
8. The steel soundproof and heat insulating fireproof door according to claim 6, wherein: the compression spring includes a compression spring (72).
9. The steel soundproof and heat insulating fireproof door according to claim 8, wherein: the periphery wall circumference of locating pin (71) sets firmly fixed ring (711) that are located hidden groove (61), the periphery wall of fixed ring (711) and the interior wall laminating setting of hidden groove (61) mutually, compression spring (72) cover is located on locating pin (71) and one end and fixed ring (711) fixed connection, the other end and the diapire fixed connection of hidden groove (61).
10. The steel soundproof and heat insulating fireproof door according to claim 1, wherein: and a fireproof expansion sealing strip (8) is arranged at the joint of the outer plate (21) and the door frame (1).
CN202120553083.2U 2021-03-17 2021-03-17 Steel sound-proof heat-insulation fireproof door Active CN215056816U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120553083.2U CN215056816U (en) 2021-03-17 2021-03-17 Steel sound-proof heat-insulation fireproof door

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120553083.2U CN215056816U (en) 2021-03-17 2021-03-17 Steel sound-proof heat-insulation fireproof door

Publications (1)

Publication Number Publication Date
CN215056816U true CN215056816U (en) 2021-12-07

Family

ID=79153817

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120553083.2U Active CN215056816U (en) 2021-03-17 2021-03-17 Steel sound-proof heat-insulation fireproof door

Country Status (1)

Country Link
CN (1) CN215056816U (en)

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