A self-locking fire door for a substation

Abstract

The present invention discloses a self-locking fire door for a substation, which includes a bottom plate. A fireproof core board is installed on the single-side plate surface corresponding to the bottom plate. It includes a frame for wrapping the side of the fireproof core board. A pressing plate is also installed between the frame and the fireproof core board. An elastic support device is arranged between the pressing plate and the fireproof core board. The side of the pressing plate has a pressing strip. By pressing the pressing plate, the pressing strip is pressed into the pressing groove, so that the locking strip extends out of the strip-shaped groove and is fixed to the door frame to achieve locking. Under the conditions of places such as substations, in the event of a fire, it is an explosive fire, accompanied by high-temperature and high-pressure impact force. The side of the pressing plate is a pressing strip. Through the cooperation with the pressing groove, the locking strip extends out of the strip-shaped groove and is squeezed against the door frame. The violent impact force can directly break the brittle fixation between the locking strip and the fireproof core board, blocking the gap between the door leaf and the door frame.

Description

Technical Field

[0001] The invention belongs to the technical field of fire doors, and particularly relates to a self-locking fire door for a substation. Background Art

[0002] A UHV converter station refers to a station established in a high-voltage DC power transmission system to complete the conversion of alternating current to direct current or direct current to alternating current and meet the requirements of the power system for safety, stability, and power quality. Oil-immersed transformers with a single capacity of 125 MV·A or more and oil-immersed reactors with a capacity of 200 Mvar or more are installed inside. The UHV converter station is equipped with oil-immersed reactors containing combustible fuel. When a fire occurs, the flame is an explosive jet flame, which can raise the temperature of the pipeline to 1200 °C within 20 s, and even reach 1400 °C.

[0003] The above-mentioned converter station or transformer substation is installed in a closed and dry space. Due to voltage flashover or high-low voltage imbalance, it is a place prone to fire. Not only does it need to be frequently maintained, but fire prevention measures must also be in place. The doors in such a closed space are not ordinary protective doors, but special fire doors with a blocking function to facilitate the entry of maintenance personnel. The fire in such places is accompanied by combustible oil, and the ignition mode is explosive ignition, accompanied by high voltage and high temperature. The violent shock wave formed can directly destroy the door from the inside out. Although the fire door itself is strong and fireproof, its combination with the door frame is insufficient, and it will be directly torn off the hinge and fly out under the action of the high-pressure shock wave. Furthermore, the fire in the substation spreads everywhere with the combustible insulating oil, resulting in a more serious fire situation.

[0004] As a door leaf, it cannot be closely attached to the door frame itself because the door needs to be convenient to open and close. After the door leaf is closely attached to the door frame, it is not convenient to open and close, and the sealing performance will also decrease over time.

[0005] Therefore, the door leaf of the fire door prepared by the invention can instantaneously react and form a self-locking and closed structure even when not attached to the door frame in the event of a fire, so that the door leaf and the door frame are closely combined during a fire, preventing the occurrence of a more serious fire spread phenomenon, and being applicable to places with explosive ignition such as substations. Summary of the Invention

[0006] The purpose of the invention is to provide a self-locking fire door for a substation, which can instantaneously react and form a self-locking and closed structure even when not attached to the door frame in the event of a fire.

[0007] To solve the above technical problems, the invention is realized through the following technical solutions:

[0008] A self-locking fire door for a substation, comprising a bottom plate, wherein a fireproof core board is installed on the single-side plate surface corresponding to the bottom plate, and a stepped portion is formed between the fireproof core board and the bottom plate;

[0009] It includes a frame for wrapping the side of the fireproof core board. A pressing plate is also installed between the frame and the fireproof core board. The frame wraps the side of the pressing plate, and an elastic support device is arranged between the pressing plate and the fireproof core board;

[0010] Locking strips are installed on the sides of the fireproof core board. The locking strips fixedly connect the corresponding sides of the fireproof core board in a brittle manner. A strip-shaped groove for the locking strips to extend out is opened on the side of the frame corresponding to the locking strips;

[0011] The side of the pressing plate has a pressing strip, and the locking strip has a pressing groove for accommodating the pressing strip. Pressing the pressing plate makes the pressing strip press into the pressing groove, so that the locking strip extends out of the strip-shaped groove and is fixed to the door frame to achieve locking.

[0012] Further, the elastic support device includes a sponge layer located between the pressing plate and the fireproof core board.

[0013] Further, a support frame is built in the fireproof core board. The support frame is in an X shape. The four corresponding endpoints of the support frame are located at the four corner positions of the fireproof core board. The fireproof core board is divided into four parts by the support frame, and the support frame is fixed to the bottom plate.

[0014] Further, the support frame has a support wall for wrapping the side where the fireproof core board abuts, and the fireproof core board is fixed through the support wall.

[0015] Further, the elastic support device also includes a spring located between the pressing plate and the bottom plate. The central intersection and the four endpoints of the support frame are each provided with a sleeve, and the spring is located in each sleeve.

[0016] Further, the pressing plate is correspondingly provided with a fixing member sleeved inside the spring. The fixing member is a tube body, and the end is fixed to the pressing plate.

[0017] Further, the locking strip is formed by multiple bends of a steel plate. The side of the locking strip corresponding to the fireproof core board has a clamping groove for clamping the side of the fireproof core board. The pressing groove has an inclined surface portion, and the pressing strip is a strip-shaped protrusion formed by an inwards-bending of the side of the pressing plate.

[0018] Further, the inside of the locking strip is supported by plate ribs.

[0019] Further, the side of the frame extends towards the side of the bottom plate, and wraps the side of the bottom plate after being bent.

[0020] The present invention has the following beneficial effects: Under the conditions of places such as substations, when a fire breaks out in an explosive manner, accompanied by high-temperature and high-pressure impact force, when this impact force hits the pressing plate, it forces the pressing plate to squeeze inward. The side of the pressing plate is a pressing strip, and through the cooperation with the pressing groove, the direction of force and transmission is changed by 90°. Furthermore, the pressing force formed by the impact is turned into the direction along the movement direction of the locking strip, so that the locking strip extends out of the strip-shaped groove and presses against the door frame. The violent impact force can directly break the brittle fixation between the locking strip and the fireproof core board, blocking the gap between the door leaf and the door frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below.

[0022] Figure 1 : Schematic diagram of the disassembled structure of the frame of the present invention.

[0023] Figure 2 : Schematic diagram of the disassembled structure of the pressing plate of the present invention.

[0024] Figure 3 : Schematic diagram of the back structure of the pressing plate of the present invention.

[0025] Figure 4 : Schematic diagram of the disassembled structure of the locking strip and the fireproof core board of the present invention.

[0026] Figure 5 : Schematic diagram of the bottom plate structure of the present invention.

[0027] Figure 6 : Schematic diagram of the cross-sectional structure of the locking strip of the present invention.

[0028] Figure 7 : Schematic diagram of the complete assembled structure of the door leaf of the present invention.

[0029] In the drawings, the list of components represented by each reference numeral is as follows: bottom plate 1, fireproof core board 6, frame 2, pressing plate 3, locking strip 5, strip-shaped groove 21, pressing strip 31, pressing groove 51, sponge layer 4, support frame 7, support wall 71, spring 32, sleeve 72, fixing member 33, card slot 52, plate rib 53. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0031] As Figure 1-7As shown: A self-locking fire door for a substation, including a bottom plate 1. The bottom plate is a galvanized steel plate, and a fireproof core board 6 is installed on the single-side plate surface corresponding to the bottom plate 1. The fireproof core board is made of expanded perlite material, and a stepped portion is formed between the fireproof core board 6 and the bottom plate 1; this stepped portion is used to fit with the door frame and accommodate the door frame. The bottom plate is a support plate, with the fireproof surface corresponding to the fireproof core board and the backfire surface being a flat plate.

[0032] It includes a frame 2 for wrapping the side of the fireproof core board 6. The frame is formed by multiple 90° bends of galvanized steel plates, used to fix the fireproof core board, in the shape of a rectangular square frame, with screw holes opened and fixed by bolts. A pressing plate 3 is also installed between the frame 2 and the fireproof core board 6. The frame 2 wraps the side of the pressing plate 3, and an elastic support device is arranged between the pressing plate 3 and the fireproof core board 6; so that the pressing plate can relatively squeeze the elastic support device when pressed on the plate surface, making it easy to press the pressing plate inward.

[0033] Locking bars 5 are installed on the sides of the fireproof core board 6. The locking bars 5 are brittlely fixed to the corresponding sides of the fireproof core board 6. A strip-shaped groove 21 for the locking bars 5 to extend out is opened on the side of the frame 2 corresponding to the locking bars 5; the brittle fixing method of the locking bars is watering bonding. Since the fireproof core board is an inorganic material, the locking bars are easily separated from the restraint of the fireproof core board.

[0034] The side of the pressing plate 3 has a pressing strip 31, and the locking bar 5 has a pressing groove 51 for accommodating the pressing strip 31. Press the pressing plate 3 to press the pressing strip 31 into the pressing groove 51, so that the locking bar 5 extends out of the strip-shaped groove 21 and is fixed to the door frame to achieve locking.

[0035] Under the conditions of places such as substations, when a fire breaks out in an explosive manner, accompanied by high-temperature and high-pressure impact force, when this impact force hits the pressing plate, it forces the pressing plate to be pressed inward. The side of the pressing plate is a pressing strip. Through the cooperation with the pressing groove, the direction of force and transmission is changed by 90°. Furthermore, the pressing force formed by the impact is turned into the direction along the movement direction of the locking bar, so that the locking bar extends out of the strip-shaped groove and presses against the door frame. The violent impact force can directly break the brittle fixation between the locking bar and the fireproof core board, blocking the gap between the door leaf and the door frame.

[0036] At the same time, the greater the impact force, the greater the pressing force of the pressing plate, and the greater the pressing and moving amplitude of the locking bar. The pressing plate itself may be deformed, but it can play a good role in quickly blocking the spread of fire, preventing the spread of insulating combustible oil in the substation and causing a more serious fire.

[0037] As Figure 2 shown: The elastic support device includes a sponge layer 4 located between the pressing plate 3 and the fireproof core board 6. The sponge layer has elasticity and can be deformed when pressed. At the same time, the sponge layer can effectively soundproof and improve the soundproof effect of the door leaf.

[0038] As Figure 4As shown: The fireproof core board 6 is internally provided with a support frame 7. The support frame 7 is in an X shape, and the four corresponding end points of the support frame 7 are located at the four corner positions of the fireproof core board 6. The fireproof core board 6 is separated into four pieces by the support frame 7, and the support frame 7 is fixed to the bottom plate 1. The fireproof core board is made of expanded perlite, has pores inside, is relatively soft in texture, is prone to cracking and is easily damaged under the action of the pressing plate. Therefore, it is supported by the support frame. During installation, the support frame is first welded, and then the fireproof core boards are sequentially spliced and fixed.

[0039] As Figure 4 , 5 shown: The support frame 7 has a support wall 71 that wraps the side of the fireproof core board 6 in contact with it, and the fireproof core board 6 is fixed through the support wall 71. The support wall is parallel to the bottom, and the support wall and the support frame are of an integral structure. The cross-section of the support frame is in an I shape, and holes are opened on the support wall, and it is fixed by passing bolts through the fireproof core board.

[0040] The elastic support device further includes a spring 32 located between the pressing plate 3 and the bottom plate 1. The central intersection and the four end points corresponding to the support frame 7 are each provided with a sleeve 72, and the spring 32 is located in each sleeve 72. In addition to the elastic support function of the sponge layer, the support function is further improved.

[0041] As Figure 3 shown: The pressing plate 3 correspondingly has a fixing member 33 sleeved inside the spring 32. The fixing member 33 is a tube body, and the end is fixed to the pressing plate 3. It is used to sleeve and fix the spring to stably install the spring.

[0042] The lock bar 5 is formed by multiple bends of a steel plate. The side of the lock bar 5 corresponding to the fireproof core board 6 has a clamping groove 52 for clamping the side of the fireproof core board 6. The pressing groove 51 has an inclined surface portion, and the pressing strip 31 is a strip-shaped protrusion formed by an inwardly buckled bend on the side of the pressing plate 3. The cross-sections of the pressing groove and the pressing strip are both triangular, and the corresponding inclined surfaces are in contact with each other during pressing, causing the force and movement directions to change by 90°.

[0043] As Figure 6 shown: The inside of the lock bar 5 has a plate rib 53 for support. The lock bar is formed by bending a galvanized steel plate, and is internally reinforced by the plate rib to improve the support strength and prevent deformation.

[0044] The side of the frame 2 extends towards the side of the bottom plate 1, and wraps the side of the bottom plate 1 after bending. The bottom plate and the frame form a more complete structure. The part of the frame corresponding to the part parallel and coincident with the bottom plate is provided with holes and fixed by bolts.

[0045] This specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention.

Claims

1. A self-locking fire door for a substation, characterized in that: it includes a bottom plate (1), and a fireproof core board (6) is installed on the single-side plate surface corresponding to the bottom plate (1), and a stepped portion is formed between the fireproof core board (6) and the bottom plate (1); it includes a frame (2) for wrapping the side of the fireproof core board (6), a pressing plate (3) is also installed between the frame (2) and the fireproof core board (6), the frame (2) wraps the side of the pressing plate (3), and an elastic support device is arranged between the pressing plate (3) and the fireproof core board (6); locking bars (5) are installed on the sides of the fireproof core board (6), the locking bars (5) are brittly fixed to the corresponding sides of the fireproof core board (6), and strip-shaped grooves (21) for the locking bars (5) to extend out are opened on the sides of the frame (2) corresponding to the locking bars (5); the side of the pressing plate (3) has a pressing strip (31), the locking bar (5) has a pressing groove (51) for accommodating the pressing strip (31), pressing the pressing plate (3) makes the pressing strip (31) press into the pressing groove (51), so that the locking bar (5) extends out of the strip-shaped groove (21) and is fixed to the door frame to achieve locking; a support frame (7) is arranged inside the fireproof core board (6), the support frame (7) is in an X shape, the four corresponding endpoints of the support frame (7) are located at the four corner positions of the fireproof core board (6), the fireproof core board (6) is divided into four pieces by the support frame (7), and the support frame (7) is fixed to the bottom plate (1); the support frame (7) has a support wall (71) for wrapping the side where the fireproof core board (6) abuts, and the fireproof core board (6) is fixed through the support wall (71); the locking bar (5) is formed by multiple bends of a steel plate, the side of the locking bar (5) corresponding to the fireproof core board (6) has a clamping groove (52) for clamping the side of the fireproof core board (6), the pressing groove (51) has an inclined surface part, and the pressing strip (31) is a strip-shaped protrusion formed by inwards buckling and bending on the side of the pressing plate (3).

2. The self-locking fire door for a substation according to claim 1, characterized in that: the elastic support device includes a sponge layer (4) located between the pressing plate (3) and the fireproof core board (6).

3. The self-locking fire door for a substation according to claim 1, characterized in that: the elastic support device further includes a spring (32) located between the pressing plate (3) and the bottom plate (1), and sleeves (72) are arranged at the central intersection and the four endpoints corresponding to the support frame (7), and the spring (32) is located in each sleeve (72).

4. The self-locking fire door for a substation according to claim 3, characterized in that: the pressing plate (3) correspondingly has a fixing part (33) sleeved inside the spring (32), and the fixing part (33) is a tube body, and the end is fixed to the pressing plate (3).

5. The self-locking fire door for a substation according to claim 1, characterized in that: the inside of the locking bar (5) has plate ribs (53) for support.

6. The self-locking fire door for a substation according to claim 1, characterized in that: the side of the frame (2) extends towards the side of the bottom plate (1), and the side of the bottom plate (1) is wrapped after being bent.

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