Labyrinth-free fireproof door in middle of elevator

Abstract

The invention discloses an elevator middle labyrinth-free type fireproof door which comprises a left door plate and a right door plate, fireproof labyrinth structures are arranged on the side portions and the tops of the left door plate and the right door plate, the left door plate and the right door plate are included, and the connection position of the left door plate and the right door plate is of a plane attaching structure. By means of the optimized structure, production line equipment investment can be effectively reduced, production procedures are optimized, production efficiency is improved, elevator installation efficiency is effectively improved in the installation process, and the failure rate of the fireproof door is effectively reduced in the elevator using process. After the maze-free fire-resistant door is adopted, the middle position of the door plate is of a maze-free structure, so that the stress area is increased compared with a traditional maze fire-resistant door, and the risk of being clamped is reduced.

Description

Technical Field

[0001] The invention relates to the field of elevator manufacturing, and in particular to a labyrinth-free fireproof door in the middle of an elevator. Background Art

[0002] In Article 6.3 of GB 55037-2022 "General Code for Building Fire Protection", Fire Protection of Shafts, Pipelines and Fire Blockage, Article 6.3.1 stipulates that the elevator shaft should be set up independently, and no flammable gas or Class A, B, C liquid pipelines or wires or cables unrelated to elevator operation should be laid or passed through the elevator shaft. The fire resistance integrity of the elevator floor door should not be less than 2.00h.

[0003] To meet the requirements of the above standards, the corresponding test standards are GB / T 27903-2011 "Determination of integrity, thermal insulation and heat flux of elevator floor doors in fire resistance test" and GB / T 24480-2009 "Determination of leakage, thermal insulation and radiation of elevator floor doors in fire resistance test".

[0004] In GB / T 27903-2011, Article 8.2.1 Integrity (E) Judgment Criteria is: When measuring according to the provisions of GB / T 9978.1, the test piece loses integrity when one of the following situations occurs: the cotton pad is ignited (except for non-insulated elevator landing doors);

[0005] a) The flame on the back side of the specimen lasts for more than 10 seconds;

[0006] b) A probe with a diameter of 6 mm ± 0.1 mm passes through the gap into the furnace and moves not less than 150 mm along the length of the gap;

[0007] c) A probe with a diameter of 25 mm ± 0.2 mm passes through the gap and enters the furnace.

[0008] GB / T 24480-2009 Article 15.1 Integrity (E) Judgment Standard: Integrity is a major technical indicator for judging the performance of elevator landing doors. For landing door samples, as long as the leakage per meter in the door opening width direction does not exceed 3m3 / min, it is considered to meet the integrity requirements, regardless of the initial 14-minute test.

[0009] When a flame occurs on the back-fire surface of the floor door operator and burns for more than 10 seconds, it is judged to have lost its integrity.

[0010] Based on the above standards, in order to meet the test requirements, the prior art involves a maze structure of the elevator door, that is, a maze structure is used in the middle position of the two door panels of the center door, and a maze structure is also used between the door panel and the upper end and left and right sides of the door frame, and between the sill, so as to ensure that the joints where the components are installed and the working joints of the door have a maze structure to prevent the structure from being deformed by high temperature and flames from spreading.

[0011] However, in order to meet the standards and fire protection requirements, a maze structure is used in many places of the elevator door, which has the following disadvantages:

[0012] (1) High cost, mainly reflected in the fact that the use of maze structures in multiple places places high demands on production equipment, increases the number of working steps, and requires high and complex matching of production line equipment, while also reducing production efficiency; (2) The use of maze structures in multiple places places higher demands on the on-site installation of elevators, increasing the failure rate; (3) The use of maze structures in the middle of the two door panels of the center-split door increases the risk of being pinched. Summary of the invention

[0013] In the fire protection experiments that meet the above standards, the experimenters found that based on a large number of tests, affected by high temperature, the deformation of high-temperature materials in flames and the differences in temperature rise curves in various areas, the differences in the use of maze structures and non-maze structures in various areas of the fire door were verified. By improving the use of non-maze structures in the middle position of the two door panels of the center door, and only using maze structures at the upper ends of the door panels and segmented maze structures at the upper and lower positions of both sides, good fire protection effects can still be maintained. Through standard fire protection experiments, the above structures can also meet the test requirements of GB / T 27903-2011 "Determination of integrity, thermal insulation and heat flux of elevator floor doors in fire resistance tests" and GB / T 24480-2009 "Determination of leakage, thermal insulation and radiation of elevator floor doors in fire resistance tests".

[0014] The object of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a labyrinth-free fire door in the middle of an elevator.

[0015] The utility model discloses a non-labyrinth fireproof door in the middle of an elevator, comprising a left door panel and a right door panel, wherein the side and the top of the left door panel and the right door panel are provided with a fireproof labyrinth structure, and the joint position of the left door panel and the right door panel is a plane fitting structure.

[0016] Further: the lower ends of the left door panel and the right door panel are in plane-fitting structure with the floor door sill.

[0017] Further: the upper left fireproof board and the upper right fireproof board are respectively arranged on the upper sides of the left door panel and the right door panel, and the upper left fireproof board and the upper right fireproof board form a maze structure with the door lintel on the door frame.

[0018] Further: the right door panel side is respectively provided with an upper right fireproof panel and a lower right fireproof panel, which form a maze structure with the right column of the door frame at the upper and lower ends; the left door panel side is respectively provided with an upper left fireproof panel and a lower right fireproof panel, which form a maze structure with the upper left fireproof panel, the lower left fireproof panel and the left column of the door frame at the upper and lower ends.

[0019] Compared with the prior art, the present invention has the following advantages and effects: Compared with the traditional fire-resistant door with a labyrinth, the above-mentioned optimized structure can effectively reduce the investment in production line equipment, optimize the production process, and improve production efficiency. During the installation process, the elevator installation efficiency is effectively improved, and during the use of the elevator, the failure rate of the fire-resistant door is effectively reduced. After the fire-resistant door without a labyrinth, the middle position of the door panel is a non-maze structure, which increases the force-bearing area compared with the traditional fire-resistant door with a labyrinth and reduces the risk of being pinched. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of the structure of a labyrinth-free fire door in the middle of an elevator according to an embodiment of the present invention.

[0021] Figure 2 It is a side view of the structure of a labyrinth-free fire door in the middle of an elevator according to an embodiment of the present invention.

[0022] Figure 3 It is a three-dimensional diagram of the structure of the labyrinth-free fire door in the middle of the elevator according to an embodiment of the present invention.

[0023] Figure numbers: left door panel 101, right door panel 102, floor door sill 103, door frame 104, upper left fireproof board 105, upper right fireproof board 106, upper right side fireproof board 107, lower right side fireproof board 108, upper left side fireproof board 109, lower left side fireproof board 110. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0025] According to the common understanding of the industry, in order to compensate for the deformation of the door panels under the high temperature environment of combustion, if the gap between the door panels is too large after deformation, flames will burst out, thus causing the fire protection function of the protective door to fail. Therefore, the fire doors currently on the market need to have a maze structure set at the outer periphery and the junction of the two doors in the middle. In particular, the maze structure in the middle is generally formed in one piece with the door panel. It is generally made by using specific bending sheet metal equipment, and the bending accuracy is required to be high. When the bending accuracy is unqualified, the door panel cannot be closed or the gap is large after closing, thus affecting the fire protection effect.

[0026] Based on the fire resistance performance test of conventional floor doors without maze and fire-resistant floor doors with maze structure, after the fire resistance test, after the middle part of the left door panel 101 and the right door panel 102 are deformed, the deformation of the lower side of the door panel is very small, and the middle part of the door panel is concave toward the fire surface. Due to the existence of the door panel reinforcement ribs, the concave is based on the reinforcement type as the center position, based on the factor of the door panel edge frame (extending on the back fire surface), when the door panel extends on the fire surface, it can still form a tight fit in the middle based on its deformation. Based on the experiment of this product, at 121 minutes, there was no continuous flame on the back fire surface of the specimen, and there was no gap on the back fire surface of the specimen that penetrated into the test furnace, which can achieve a fire prevention effect. After the fire resistance test of conventional floor doors without maze structure, the upper and side of the door panels without maze structure have certain deformation due to the lack of restricting structure, and the back fire surface has gaps penetrating into the test furnace. There is a gap in the furnace, and a continuous flame appears on the back-to-fire side. In practice, there is no obvious deformation or through gap at the joint of the bottom of the door panel and the door sill. While retaining the maze structure, the fire-resistant effect is effectively guaranteed. By adopting this scheme, after analysis, after the fire-facing side of the fire-resistant door is exposed to fire, the left door panel 101 and the right door panel 102 adopt a plane connection structure. Under the action of heat, the middle positions of the left door panel 101 and the right door panel 102 are simultaneously concave toward the fire-facing side, and the upper and lower sides of the door panels are slightly tilted toward the back-to-fire side. At this time, the left door panel 101 and the right door panel 102 are still in contact with each other to prevent the flame from passing through. At the same time, the upper left fireproof board 105, the upper right fireproof board 106, the upper right side fireproof board 107, the lower right side fireproof board 108, the upper left side fireproof board 109, and the lower left side fireproof board 110 are set in the maze structure, and the upper and lower ends of the door panels are not deformed too much to prevent the flame from passing through.

[0027] Therefore, this embodiment provides a labyrinth-free fire door in the middle of an elevator, including a left door panel 101 and a right door panel 102, and a fire labyrinth structure is arranged on the sides and the top of the left door panel 101 and the right door panel 102, and the joint position of the left door panel 101 and the right door panel 102 is a flat fitting structure.

[0028] Through experiments, it is known that while retaining the fireproof maze structure of other parts of the door panel, the fireproof maze structure at the junction of the left door panel 101 and the right door panel 102 is cancelled. Based on the experimental verification, it is known that under the action of heat, the middle position of the door panel is concave toward the fire surface at the same time, and the upper and lower sides of the door panel are slightly tilted toward the back fire surface, achieving the effect of blocking the flame. Therefore, the maze structure at the junction of the left door panel 101 and the right door panel 102 can be cancelled and replaced by a flat fitting structure. Since in the current fireproof door panel molding process, the left door panel 101 The maze structure of the right door panel 102 is formed by multiple bendings on a bending machine during production on the production line. Therefore, the production line needs to invest in additional processes, which affects efficiency, as well as the qualified rate of finished products and increases equipment investment. Canceling it will help optimize the production line (the door panel only needs to be produced on the traditional floor door panel processing line, and then assembled with an additional fireproof structure in the subsequent installation), reduce production energy consumption, improve production efficiency and yield rate, and the promotion of this discovery and the structural improvement of the floor door will also greatly promote the development of elevator industry manufacturing.

[0029] Based on this, specifically in the elevator fire door product in this embodiment, the lower ends of the left door panel 101 and the right door panel 102 are in a planar fit with the floor door sill 103 . As shown in the figure, an upper left fireproof board 105 and an upper right fireproof board 106 are respectively arranged on the upper sides of the left door panel 101 and the right door panel 102, and the upper left fireproof board 105 and the upper right fireproof board 106 form a maze structure with the door lintel of the door frame 104. Specifically, an "L"-shaped board is respectively arranged on the door panel and the door frame 104 to form a staggered structure. For the optimization of the structures of other parts of the left door panel 101 and the right door panel 102, specifically, an upper right fireproof board 107 and a lower right fireproof board 108 are respectively arranged on the side of the right door panel 102, and an upper left fireproof board 109 and a lower left fireproof board 110 are respectively arranged on the side of the left door panel 101. Therefore, the upper right fireproof board 107 and the lower right fireproof board 108 form a maze structure with the right column of the door frame 104 at the upper and lower ends; the upper left fireproof board 109, the lower left fireproof board 110 and the door frame 1 04 The left column forms a maze structure at the upper and lower ends, and in coordination with the installation process, the left door panel 101 and the right door panel 102 form an "L"-shaped interaction with the corresponding door frame 104, wherein the upper right fireproof plate 107, the lower right fireproof plate 108, the upper left fireproof plate 105 and the upper right fireproof plate 106 are fixed on the corresponding left door panel 101 and the right door panel 102 on one side, and the other side is in a "U"-shaped contact with the groove of the corresponding door frame 104 on one side. In summary, on the one hand, the upper right fireproof plate 107, the lower right fireproof plate 108, the upper left fireproof plate 105 and the upper right fireproof plate 106 form a maze structure to form a fireproof structure, and on the other hand, a certain reinforcement structure is structured, combined with the left door panel 101 and the right door panel 102 to form an "L"-shaped interaction with the corresponding door frame 104, which further strengthens the placement deformation and improves the fireproof performance.

[0030] The above contents described in this specification are merely examples of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, as long as they do not deviate from the contents of the present specification or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. An elevator middle non-labyrinth fire door, comprising a left door panel and a right door panel, the side and top of the left door panel and the right door panel are provided with a fireproof labyrinth structure, characterized in that: The joint between the left door panel and the right door panel is a flat fitting structure.

2. The elevator middle non-labyrinth fire door according to claim 1, characterized in that: The lower ends of the left door panel and the right door panel are in plane-fitting structure with the floor door sill.

3. An elevator middle non-labyrinth fire door according to claim 1 or 2, characterized in that: A left upper fireproof board and a right upper fireproof board are respectively arranged on the upper sides of the left door panel and the right door panel, and the left upper fireproof board and the right upper fireproof board form a maze structure with the door lintel on the door cover.

4. The elevator middle non-labyrinth fire door according to claim 3, characterized in that: The right door panel side is respectively provided with a right upper fireproof board and a right lower fireproof board, which form a maze structure with the right column of the door frame at the upper and lower ends; the left door panel side is respectively provided with a left upper fireproof board and a right lower fireproof board, which form a maze structure with the upper left fireproof board, the lower left fireproof board and the left column of the door frame at the upper and lower ends.

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