Invisible piping shaft fireproof door

Abstract

Provided is an invisible piping shaft fireproof door. Decorative piping shaft fireproof doors of high-end residences, hotels and the like in the current market are formed by machining and manufacturing two door types respectively, the manufacturing method is achieved through the two door types, the manufacturing cost is increased, and installation personnel are difficult to install compared with a common door type in the installation process; due to the fact that the decorative door is additionally arranged, the inside fireproof door of the pipe well cannot be completely opened, and inconvenience is brought to inspection and maintenance work of the pipe well. Based on the reason, an invisible piping shaft fireproof door is urgently needed to fill the vacancy in the market. The door comprises a door frame, a door leaf and an outer decoration panel, the door frame is connected with the door leaf through a multi-angle rotating hinge, the outer decoration panel is fixed on the door leaf through a steel L-shaped corner connector, and an invisible pull ring handle is arranged outside the outer decoration panel. The fireproof door is used for the hidden piping shaft.

Description

Technical Field

[0001] This utility model relates to a fireproof door for concealed pipe wells. Background Technology

[0002] Currently, fireproof doors for decorative pipe shafts in high-end residences, hotels, and other establishments are manufactured using two separate door types. First, a standard pipe shaft door conforming to the national standard GB12955-2008 "Fire Doors" is installed inside the pipe shaft opening. Second, a decorative door is added to the outside of the standard door, solely for aesthetic purposes. This decorative door is constructed using welded square tubing, with square tubing welded around the door leaf and supporting ribs in the center. The remaining open areas are covered with external decorative material to blend seamlessly with the finished wall surface, resulting in a pleasing aesthetic. However, this method requires two door types, increasing manufacturing costs and making installation more difficult than with standard doors. Furthermore, the addition of this decorative door prevents the inner fireproof door from being fully opened, hindering pipe shaft inspection and maintenance. Therefore, there is an urgent need for an invisible fireproof door for pipe shafts to fill this market gap. Utility Model Content

[0003] The purpose of this utility model is to solve the above-mentioned problems and provide a concealed fireproof door for pipe wells.

[0004] The above objectives are achieved through the following technical solutions:

[0005] A concealed fire door for pipe shafts comprises a door frame, a door leaf, and an outer decorative panel. The door frame and the door leaf are connected by a multi-angle rotating hinge. The outer decorative panel is fixed to the door leaf by a steel L-shaped corner bracket. The outer decorative panel is equipped with a concealed pull ring handle.

[0006] The aforementioned concealed pipe well fireproof door, wherein the multi-angle rotating hinge includes two L-shaped supports for the door frame, one L-shaped support for the door leaf, two door frame support arms, and one door leaf support arm. Each of the L-shaped supports for the door frame is fixed to the door frame with screws. One end of each door frame support arm is rotatably connected to the L-shaped support for the door frame via a pivot bolt, and the other end is fitted onto the upper and lower pivot bolts and rotatably connected to a steel sleeve with tapped ends. One end of each door leaf support arm is rotatably connected to the L-shaped support for the door leaf via a pivot bolt, and the other end is welded to the steel sleeve.

[0007] The aforementioned concealed pipe well fireproof door has a fireproof expansion sealing strip installed at the joint between the door frame and the door leaf.

[0008] The aforementioned concealed pipe well fireproof door has two fireproof latches installed on the other side of the door leaf. Beneficial effects

[0009] 1. The door frame and door leaf of this utility model are connected by a multi-angle rotating hinge. The multi-point rotation function can realize the door opening angle of 180°. When the door is opened to 180°, the operating space is large enough to meet the work space of the workers during construction.

[0010] 2. When the door leaf of this utility model is closed, the external decorative panel of the door leaf is integrated with the wall decorative panel, achieving an invisible effect.

[0011] 3. The door leaf of this utility model is filled with a composite fireproof core board, and an external wrapping fireproof expansion sealing strip with no broken edges is set at the joint between the door frame and the door leaf. While ensuring the high overall rigidity and strength of the door, the fire resistance performance can stably meet the requirements of GB12955-2008 for fireproof doors for pipe shafts. Attached Figure Description

[0012] Figure 1 This is a front view (outer decorative surface) of this utility model.

[0013] Figure 2 This is a front view before the decorative panels are installed;

[0014] Figure 3 yes Figure 1 AA cross-section view;

[0015] Figure 4 yes Figure 1 BB cross-section;

[0016] Figure 5 yes Figure 1 CC cross-section;

[0017] Figure 6 This is the visible surface effect when the device is opened to 180°.

[0018] Figure 7 This is a cross-sectional view of the present invention with its transverse section opened by 180°;

[0019] Figure 8 This is a picture of the actual appearance of the concealed pull ring handle 1;

[0020] Figure 9 This is a diagram of a multi-angle rotating controllable hinge structure;

[0021] Figure 10 This is a diagram demonstrating the process of a door opening from a closed state to a 180° open angle.

[0022] Figure 11 It is a 3D model of the door when it is opened 180°.

[0023] In the diagram: 1. Concealed pull ring handle; 2. Exterior decorative panel; 3. Fireproof lock for pipe shaft; 4. Multi-angle rotating hinge; 5. Fireproof lock tongue; 6. Fireproof expansion seal; 7. Door frame; 8. L-shaped corner bracket; 9. Door leaf; 10. Composite fireproof door core board; 11. Expansion bolt; 1-2. Keyhole; 1-3. Pull ring; 4-1. L-shaped support for door frame; 4-3. Gasket; 4-4. Door frame support arm; 4-5. L-shaped support for door leaf; 4-6. Upper and lower pivot bolts; 4-7. Steel sleeve; 4-8. Door leaf support arm; 4-9. Pivot bolt. Detailed Implementation

[0024] like Figure 1-8 As shown, a concealed pipe shaft fire door comprises a door frame 7, a door leaf 9, and an outer decorative panel 2. The door frame and the door leaf are connected by a multi-angle rotating hinge 4. The outer decorative panel is fixed to the door leaf by a steel L-shaped corner bracket 8. The outer decorative panel is equipped with a concealed pull ring handle 1.

[0025] The door frame 7 and door leaf 9 are made of cold-rolled galvanized sheet bent and welded. The outer decorative panel 2 is the same as the decorative material of the interior wall of the corridor.

[0026] The door leaf 9 is filled with a composite fireproof door core board 10; an external wrapping fireproof expansion sealing strip 6 with no broken ends is installed at the joint between the door frame and the door leaf; a pipe well fireproof lock 3 and a multi-angle rotating hinge 4 are installed on one side of the door frame and the door leaf; an invisible pull ring handle 1 is installed on the outside of the outer decorative panel 2, and the invisible pull ring handle is fastened to the door leaf with screws.

[0027] Four steel L-shaped corner brackets 8 are fixed to the outside of the steel door leaf 9 with screws. They serve as external load-bearing brackets when the external decorative materials are installed to ensure that the external decorative panel 2 is firmly connected to the steel door leaf.

[0028] like Figure 9 As shown, the multi-angle rotating hinge includes two L-shaped supports 4-1 for the door frame, one L-shaped support 4-5 for the door leaf, two door frame support arms 4-4, and one door leaf support arm 4-8. Each L-shaped support is fixed to the door frame with screws. One end of each door frame support arm 4-4 is rotatably connected to the L-shaped support via a pivot bolt 4-9, and the other end is fitted onto the upper and lower pivot bolts 4-6 and rotatably connected to a steel sleeve 4-7 with tapped ends. One end of the door leaf support arm 4-8 is rotatably connected to the L-shaped support 4-5 via a pivot bolt, and the other end is welded to the steel sleeve 4-7. Multiple layers of gaskets 4-3 are provided between the L-shaped supports and the door frame support arms, and between the L-shaped supports and the door leaf support arms, to increase rotational flexibility.

[0029] On the other side of the door leaf are two fireproof latches 5. The latches are made of steel and have built-in springs, which allow the latches to extend and retract freely.

[0030] During on-site installation, expansion bolts 11 are used to fix the door frame 7 inside the door opening in the wall. The wall decorative panel covers the door frame, and an appropriate gap is left between the door panel and the outer decorative panel of the door leaf to maintain the overall aesthetics of the wall decorative surface and achieve a small gap, thus achieving an invisible effect.

[0031] Because of the unique structure of this concealed pipe shaft fire door, its multi-angle rotating controllable hinge 4 and pipe shaft fireproof lock 3 are on the same side of the door leaf, differing from ordinary pipe shaft doors in their opening and closing methods. When the door leaf is opened, as... Figure 8 As shown: First, insert the key into the keyhole shown in 1-2 to open the fireproof lock (pipe), then pull out the key, and then pull the door leaf with the pull ring 1-3;

[0032] like Figure 10 As shown: The multi-angle rotatable hinge 4 allows for flexible rotation and adjustable opening and closing angles. When the door is pulled to an opening angle of approximately 10°, the latch 5 is pulled out from the door frame. Once the latch 5 is fully extended out of the frame, the multi-angle rotatable hinge 4 is adjusted to pull the door panel parallel to the wall. Then, the multi-angle rotatable hinge 4 is rotated to fully open the door to 180° and held at a stop. The open state of the door panel is as follows: Figure 6 , Figure 7 , Figure 11 As shown; this facilitates pipeline inspection and maintenance. After work is completed, follow the instructions. Figure 10 The action shown is reversed to close the door;

[0033] With this structure, the fire resistance performance can stably meet the requirements of GB12955-2008 for fire doors of pipe shafts while ensuring the high overall rigidity and strength of the door. The appearance is decorated with decorative panels to achieve an invisible effect, and a single door type can satisfy both fire protection and decoration effects.

Claims

1. A concealed fireproof door for pipe shafts, characterized in that: Its components include a door frame, a door leaf, and an outer decorative panel. The door frame and the door leaf are connected by a multi-angle rotating hinge. The outer decorative panel is fixed to the door leaf by a steel L-shaped corner bracket. The outer decorative panel is equipped with an invisible pull ring handle.

2. The fireproof door for a concealed pipe shaft according to claim 1, characterized in that: The multi-angle rotating hinge includes two L-shaped supports for the door frame, one L-shaped support for the door leaf, two door frame support arms, and one door leaf support arm. Each L-shaped support for the door frame is fixed to the door frame with screws. One end of each door frame support arm is rotatably connected to the L-shaped support for the door frame via a pivot bolt, and the other end is fitted onto the upper and lower pivot bolts and rotatably connected to a steel sleeve with tapped ends. One end of each door leaf support arm is rotatably connected to the L-shaped support for the door leaf via a pivot bolt, and the other end is welded to the steel sleeve.

3. A fireproof door for a concealed pipe shaft according to claim 2, characterized in that: A fire-resistant expansion sealing strip is installed at the joint between the door frame and the door leaf.

4. A fireproof door for a concealed pipe shaft according to claim 3, characterized in that: The other side of the door is equipped with two fireproof latches.

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