Elevator landing door system

Abstract

The elevator landing door system comprises an upper door sleeve, a side door sleeve, a landing door and a sill, the upper portion of the landing door is provided with a top sealing plate, and the top sealing plate extends into the upper door sleeve and partially overlaps with the upper door sleeve in the horizontal direction to prevent the gap between the landing door and the upper door sleeve from exceeding a first threshold value; the side portion of the landing door is provided with a side face sealing plate, the side face sealing plate extends into the side door sleeve and is partially overlapped with the side door sleeve in the horizontal direction, and the gap between the landing door and the side door sleeve is prevented from exceeding a second threshold value. The maximum gap between the landing door and the landing door can be controlled after the landing door is heated.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to an elevator landing door system. Background Art

[0002] On June 1, 2023, the Ministry of Housing and Urban-Rural Development promulgated and implemented the "GB 55037-2022 General Code for Building Fire Protection", which strengthened the management of fire protection design acceptance of building projects. As an organic part of the building, the elevator floor door of this standard requires the fire resistance integrity of the elevator floor door to be no less than 2 hours. However, the elevator floor door will deform due to heat, resulting in excessive gap between the floor door and the door frame, causing flames to burst out from this gap and excessive leakage.

[0003] In addition, the chimney effect is the result of the combined effects of the thermal pressure caused by the temperature difference between indoor and outdoor and the outdoor wind pressure, with the former usually being dominant. The thermal pressure value is proportional to the air density difference caused by the temperature difference between indoor and outdoor and the height difference between the air inlet and outlet. The greater the temperature difference between indoor and outdoor and the taller the building, the more obvious the chimney effect. Due to the chimney effect, the air in the elevator shaft will flow upward along the shaft space, causing a pressure difference between the shaft and the outside of the elevator hall, which will lead to enhanced air convection in the elevator hall, causing the hall door to be unable to close during the final closing stroke. Summary of the invention

[0004] The technical problem to be solved by the present invention is how to avoid excessive gap between the floor door and the door frame due to deformation of the floor door due to heat.

[0005] Another technical problem to be solved by the present invention is how to effectively close the landing door under a strong chimney effect.

[0006] In order to solve the above technical problems, the present invention provides an elevator landing door system, including an upper door casing, a side door casing, a landing door and a sill, wherein the upper portion of the landing door is provided with a top sealing plate, the top sealing plate extends into the upper door casing, partially overlaps with the upper door casing in the horizontal direction, and prevents the gap between the landing door and the upper door casing from exceeding a first threshold value; the side portion of the landing door is provided with a side sealing plate, the side sealing plate extends into the side door casing, partially overlaps with the side door casing in the horizontal direction, and prevents the gap between the landing door and the side door casing from exceeding a second threshold value.

[0007] Preferably, the bending part of the side portion of the landing door has an inner lining plate matching the bending structure.

[0008] Preferably, the landing door system also includes an auxiliary door closing device; the auxiliary door closing device includes a door position detection device and a magnetic attraction device; when the door position detection device detects that the landing door is within the last preset stroke when fully closed, the magnetic attraction device is controlled to be attracted.

[0009] Preferably, the preset stroke is 20 mm.

[0010] Preferably, the landing door system further comprises a forced door closing device, and the forced door closing force of the forced door closing device is adjustable.

[0011] Preferably, the guide device at the lower part of the landing door is in rolling contact with the sill. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0013] Figure 1 This is a schematic diagram of thermal deformation of the landing door;

[0014] Figure 2 It is a partial schematic diagram of the upper part of the elevator landing door system of Example 1;

[0015] Figure 3 It is a partial schematic diagram of the side of the elevator landing door system of Example 1;

[0016] Figure 4 It is a partial schematic diagram of the elevator landing door system at the inner lining plate of Example 2;

[0017] Figure 5 This is a schematic diagram of an elevator landing door system in Example 3;

[0018] Figure 6 This is a schematic diagram of an elevator landing door system according to Embodiment 4;

[0019] Figure 7 Schematic diagram of the lower guide device of the elevator floor door system of Example 4. DETAILED DESCRIPTION

[0020] The following describes the implementation methods of the present invention through specific specific embodiments, and those skilled in the art can fully understand other advantages and technical effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through different specific implementation methods, and the details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without deviating from the overall design concept of the invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other in the absence of conflict. The following exemplary embodiments of the present invention can be implemented in a variety of different forms and should not be interpreted as being limited to the specific embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary specific embodiments to those skilled in the art.

[0021] Example 1

[0022] When a fire occurs in a building, the surface facing the fire is the decorative surface. The floor door is a thin plate component that is easily expanded by heat and has a tendency to deform. Figure 1In order to prevent the gap between the landing door and the door frame from being too large due to deformation of the landing door, this embodiment provides an elevator landing door system, including an upper door frame, a side door frame, a landing door and a sill.

[0023] like Figure 2 As shown, the upper portion of the landing door has a top sealing plate, which extends into the upper door casing and partially overlaps with the upper door casing in the horizontal direction, thereby preventing the gap between the landing door and the upper door casing from exceeding a first threshold.

[0024] like Figure 3 As shown, the side portion of the landing door has a side sealing plate, which extends into the side door sleeve and partially overlaps with the side door sleeve in the horizontal direction, thereby preventing the gap between the landing door and the side door sleeve from exceeding a second threshold.

[0025] Example 2

[0026] On the basis of Example 1, in order to further control the thermal deformation of the door, the rigidity of the door itself needs to be increased. However, it is not economical to directly increase the thickness of the door. Therefore, according to the deformation trend of the floor door, this embodiment adds an inner lining plate matching the bending structure at the bending part of the side of the floor door, such as Figure 4 As shown, the thermal deformation of the landing door is reduced.

[0027] Example 3

[0028] When the elevator landing door system operates in an environment with a severe chimney effect, the elevator landing door cannot be closed. Figure 5 As shown, the landing door system of this embodiment further includes an auxiliary door closing device; the auxiliary door closing device includes a door position detection device and a magnetic attraction device; when the door position detection device detects that the landing door is within the last preset stroke when fully closed, the magnetic attraction device is controlled to be attracted. The preset stroke is 20mm.

[0029] One or two door position detection devices can be set to detect the position of the landing door in real time. It determines whether the landing door is within the last 20mm of full closing. When the landing door is within the 20mm stroke, the control magnetic attraction device is energized to stimulate the attraction and assist the door to close. When the landing door is not within the 20mm stroke, the control magnetic attraction device is de-energized.

[0030] Example 4

[0031] On the basis of Example 3, Figure 6 As shown, the landing door system of this embodiment further comprises a forced door closing device, and the forced door closing force of the forced door closing device is adjustable.

[0032] The forced door closing device adopts modular design. The weight of the forced door closing device can be increased or decreased according to different wind pressure conditions, thereby adjusting the forced door closing force to allow the landing door to close smoothly.

[0033] Example 5

[0034] On the basis of Example 4, in addition to adding a forced door closing device, it is also possible to consider reducing the closing resistance of the landing door system when closing the door. Generally, the friction between the lower guide device and the sill is sliding friction. Figure 7 As shown, the friction between the lower guide device of the set door system and the sill is rolling friction, which minimizes the friction between the guide device and the sill.

[0035] The present invention has been described in detail above through specific implementation modes and embodiments, but these do not constitute limitations of the present invention. Without departing from the principles of the present invention, those skilled in the art may also make many variations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. An elevator landing door system, comprising an upper door casing, a side door casing, a landing door and a sill, characterized in that: The upper part of the floor door is provided with a top sealing plate, which extends into the upper door sleeve and partially overlaps with the upper door sleeve in the horizontal direction, thereby preventing the gap between the floor door and the upper door sleeve from exceeding a first threshold value; the side part of the floor door is provided with a side sealing plate, which extends into the side door sleeve and partially overlaps with the side door sleeve in the horizontal direction, thereby preventing the gap between the floor door and the side door sleeve from exceeding a second threshold value.

2. The elevator landing door system according to claim 1, characterized in that: The bending part of the side part of the landing door is provided with an inner lining plate matching the bending structure.

3. The elevator landing door system according to claim 1, characterized in that: The landing door system also includes an auxiliary door closing device; the auxiliary door closing device includes a door position detection device and a magnetic attraction device; when the door position detection device detects that the landing door is within the last preset stroke when fully closed, the magnetic attraction device is controlled to be attracted.

4. The elevator landing door system according to claim 3, characterized in that: The preset stroke is 20 mm.

5. The elevator landing door system according to claim 3, characterized in that: The landing door system further comprises a forced door closing device, and the forced door closing force of the forced door closing device is adjustable.

6. The elevator landing door system according to claim 5, characterized in that: The guide device at the lower part of the landing door is in rolling contact with the sill.

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