An outer layer stripping type beam-column support member and a method for self-isolating fire in a building structure

Abstract

The present invention discloses an outer layer peeling type beam-column support member and a building structure self-isolating fire method, belonging to the field of fire protection structures, including a beam-column main body. Four outer plate bodies distributed in a square are arranged on the outer side surface of the beam-column main body, and vertical grooves are formed on the inner side surface of the outer plate bodies; a push plate assembly is arranged inside the vertical grooves to drive the outer plate bodies to move outwards. A gap filling assembly is arranged between two adjacent outer plate bodies. The push plate assembly specifically includes: two fixed seats arranged side by side up and down. The two fixed seats are respectively fixed at the top end and the bottom end of the side surface of the beam-column main body. A through type stepping lead screw is fixedly connected between the two fixed seats. The top end and the bottom end of the outer side surface of the through type stepping lead screw are symmetrically sleeved and drivingly connected with through type stepping motors. The opposite surfaces of the two through type stepping motors are fixedly connected with a strip-shaped plate. The present invention can effectively relieve the damage of fire to the beam-column, thereby effectively prolonging the support time of the beam-column.

Description

Technical Field

[0001] The present invention specifically relates to an outer-layer peeling beam-column support member and a method for self-isolating fire in a building structure. Background Art

[0002] Since the beam-column joint is an important part of a steel structure, it is extremely vulnerable to damage under fire. The fully welded joint has good plastic deformation ability and good seismic performance, and is widely used in high-intensity earthquake areas. The finite element method is used to numerically simulate the fire resistance performance of the fully welded beam-column joint, study the mechanical behavior of the fully welded joint under different fire exposure methods, reveal the temperature change law at each beam-column joint under different fire exposure methods, and compare and analyze the influence law of the presence or absence of a fire protection layer on the temperature of the fully welded joint. The research results show that different fire exposure methods have a great influence on the temperature of the fully welded joint. When the whole joint is exposed to fire, the temperature change curves at each part of the joint are basically close, the temperature difference between different parts of the structure is small, and the whole is in a high-temperature state; when the two sides of the beam and column are exposed to fire, the temperature of the fire-exposed surface rises rapidly, and the temperature of the joint far from the fire-exposed position rises slowly, and the temperature difference at each part of the joint is large. Comparing the situation where the whole joint is exposed to fire with the situation where it is not exposed to fire, it is found that the stress at each part of the joint is significantly greater when the whole joint is exposed to fire than when it is not exposed to fire, and the increase in temperature causes the bearing capacity of the joint to decrease. When a fire protection layer is applied to the inner wall of the column and the lower side of the beam, the area with the fastest temperature rise is the fire protection layer area, and the temperature of the joint in the area with the fire protection layer is lower than that of the joint without the fire protection layer as a whole. Applying a fire protection layer to the joint can effectively reduce the temperature rise of the overall structure. However, since the steel structure itself is not a very good fire-resistant component, its fire resistance limit is only 10 to 20 minutes in an unprotected environment. When the fire spreads rapidly and causes the entire building to burn, even if there is no collapse, the steel structure inside the main wall of the building has been distorted. The steel structure plays a crucial supporting role in the whole building. Once a strong fire with a long burning duration occurs at the bottom of the building, under the high-temperature roasting, the steel bars inside the wall are very likely to undergo a physical reaction of distortion. As the high temperature continues, the steel bars will melt, and the bottom of the building will directly become brittle and collapse. In short, at present, the degree of configuration of fire protection and emergency-related configurations on building beam-columns is low. The common fire protection and emergency measures on existing beam-columns are to apply a fire protection coating on the surface of the beam-columns. At present, this shallow fire protection measure cannot effectively relieve the damage of the persistent fire to the building structure, so it cannot effectively extend the support time of the beam-columns and cannot provide enough time for rescue work. Summary of the Invention

[0003] The purpose of the present invention is to provide an outer-layer peeling beam-column support member, which can effectively relieve the damage of fire to the beam-column, thereby effectively extending the support time of the beam-column and providing enough time for rescue work, so as to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] An outer layer stripping type beam-column support member, comprising a beam-column main body, wherein four outer plate bodies distributed in a square shape are arranged on the outer side surface of the beam-column main body, and vertical grooves are formed on the inner side surfaces of the outer plate bodies; a push plate assembly is arranged inside the vertical grooves for driving the outer plate bodies to move outwards, and a gap filling assembly is arranged between two adjacent outer plate bodies.

[0006] As a further scheme of the present invention: the push plate assembly specifically includes: two fixed seats arranged side by side up and down, the two fixed seats are respectively fixed at the top end and the bottom end of the side surface of the beam-column main body, a through type stepping screw rod is fixedly connected between the two fixed seats, and through type stepping motors are symmetrically sleeved and drivingly connected to the top end and the bottom end of the outer side surface of the through type stepping screw rod, a strip-shaped plate is fixedly connected to the opposite surfaces of the two through type stepping motors, the through type stepping screw rod penetrates through the strip-shaped plate, a movable seat is detachably connected to the middle position of one side inner wall of the vertical groove, and driving arms are respectively rotatably connected between the top end and the bottom end of the two side surfaces of the movable seat and the two strip-shaped plates.

[0007] As a further scheme of the present invention: at least three uniformly distributed movable balls are embedded in the top end surface and the bottom end surface of the outer plate body.

[0008] As a further scheme of the present invention: the gap filling assembly includes: a placement groove formed on the side surface of the outer plate body, a bladder is arranged between two adjacent placement grooves, and a foam injection mechanism is arranged on one side of the bladder.

[0009] As a further scheme of the present invention: the foam injection mechanism includes: a column located on one side of the bladder, a stirring cavity is formed inside the column, a foaming solvent is filled in the stirring cavity, a rotating motor is embedded below the stirring cavity, and the top output shaft of the rotating motor penetrates through the bottom end surface of the stirring cavity and is fixedly connected with a stirring shaft, a hose is communicated between the top of the stirring cavity and the inside of the bladder, and a solenoid valve is embedded at one end of the hose communicated with the stirring cavity.

[0010] As a further scheme of the present invention: the foaming solvent includes an aluminum sulfate solution, a sodium bicarbonate solution and a foaming agent.

[0011] As a further scheme of the present invention: the bladder is an air-filled bladder made of fireproof cloth.

[0012] As a further scheme of the present invention: the outer plate body is an asbestos board.

[0013] As a further scheme of the present invention: a fireproof coating is arranged on the outer surface of the outer plate body.

[0014] A building structure self-isolating fire method realized by using the outer layer stripping type beam-column support member described in the first, second, third, fourth or fifth specific implementation manners, the building structure self-isolating fire method is:

[0015] When a fire point appears and spreads to the outer wall of the outer plate body, when the outer wall of the outer plate body burns and contacts the temperature sensor, the temperature sensor transmits the collected temperature signal to the controller, and the controller controls the start of the through-type stepping motor, so that the two through-type stepping motors on each through-type lead screw operate closer to each other, that is, the drive arm between the strip plate and the moving seat rotates relatively, and the rotating drive arm pushes the moving seat to move outward. The moving seat drives the outer plate body to move outward synchronously. The moving force of the outer plate body acts as a pulling force to pull the bladder folded inside the placement groove. After the outer plate body moves to a preset distance of at least 30 cm, the four unfolded outer plate bodies cooperate with the bladder to construct an outwardly expanding fireproof barrier sleeve outside the beam-column main body;

[0016] The rotating motor starts, the rotating motor drives the stirring shaft to rotate, the foaming solvent in the stirring chamber reacts, the solenoid valve opens, and a large amount of carbon dioxide generated by the foaming solvent is sprayed into the bladder together with the foam, forming an inner isolation and protection inner core. When the flame burns through the bladder, a large amount of carbon dioxide and foam filled inside the bladder pour out from the break, forming a protective sandwich layer to block the spread of the fire to the beam-column main body.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. Through the arranged push plate assembly, the present invention can push the outer plate body outward and unfold during a fire, so as to construct a fireproof barrier outside the beam-column main body. Among them, the push plate assembly uses a through-type stepping motor and a drive arm to drive the outer plate body to move outward. The whole structure is not only simple and efficient, but also occupies less space. Compared with the traditional cylinder drive, the push plate assembly has a larger pushing stroke and can push the constructed fireproof barrier to a farther position from the beam-column main body. By making a moving action away from the beam-column main body, it drives the external fire point away from the beam-column main body, achieving the effect of peeling off the fire point, thus achieving the effect of actively and quickly isolating the fire, preserving the basic structure of the beam-column body, achieving the effect of isolating from the fire point in a short time, prolonging the support time of the beam-column main body, playing an emergency role, and realizing a new method for the building itself to delay the spread of the fire, and striving for more effective time for the rescue work.

[0019] 2. Through the arranged gap filling assembly, the present invention can fill the gap between adjacent outer plate bodies when the outer plate body unfolds, so as to prevent the flame from contacting the beam-column main body through the gap, further improving the protection effect on the beam-column main body, and thus striving for a longer rescue time.

[0020] 3. The gap filling component of the present invention can inject a large amount of foam into the interior of the capsule through the provided foam injection mechanism. In this way, it can not only fill the capsule completely to improve stability, but also enhance the fire prevention ability of the gap where the capsule is located. In addition, when the flame burns through the capsule, a large amount of carbon dioxide and foam filled inside the capsule pour out from the break, thus playing an effect of blocking the fire or even extinguishing the fire.

[0021] 4. The outer plate body of the present invention can be adjusted. When users at the fire site want to contain the fire on a certain side around the beam-column main body to protect property from damage, first loosen one of the capsules at both ends of the outer plate body on this side, that is, select to pull out one of the positioning pins at both ends of the outer plate body. After the positioning pin disengages from the corresponding first positioning hole and the second positioning hole, the original fire prevention barrier formed in a circle is disconnected here. Then, remove the outer plate bodies on the other three sides except this side, that is, pull the outer plate body outwards so that the strip-shaped clamping block disengages from the strip-shaped clamping groove. Subsequently, move the outer plate bodies on the other three sides to align them with another outer plate body, and finally lower the pitching adjustment frame to support the outer plate bodies on the other three sides. It should be noted that when moving the outer plate body, the column also needs to be moved. In this adjustment method, the four outer plate bodies are connected as a whole to form a long fire prevention enclosure, thereby effectively blocking the fire from this side and protecting the property of users inside the building from loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 is a combined view of the connection relationship between the beam-column main body and the outer plate body;

[0024] Figure 3 is Figure 2 an enlarged structural diagram of part A in

[0025] Figure 4 is Figure 2 an enlarged structural diagram of part B in

[0026] Figure 5 is a combined view of the connection relationship between a through-type stepping screw, a through-type stepping motor, and a strip-shaped plate;

[0027] Figure 6 is a combined view of the connection relationship between the capsule and the column;

[0028] Figure 7 is a top-view structural schematic diagram of the outer plate body of the present invention in the unfolded state;

[0029] Figure 8 is a schematic diagram of the internal structure of the column;

[0030] Figure 9This is a top view structural schematic diagram of the outer plate body adjusted to the aligned use state in the present invention;

[0031] Figure 10 This is a side view structural schematic diagram of the pitching adjustment frame;

[0032] Figure 11 This is a three-dimensional structural schematic diagram of the pitching adjustment frame in the folded state.

[0033] In the figure: 1, beam-column main body; 2, outer plate body; 3, ball; 4, vertical groove; 5, fixed seat; 6, through-type stepping screw; 7, through-type stepping motor; 8, strip plate; 9, driving arm; 10, moving seat; 11, fireproof coating; 12, placement groove; 13, bladder; 14, hose; 15, column; 16, stirring chamber; 17, foaming solvent; 18, rotating motor; 19, stirring shaft; 20, solenoid valve; 21, strip-shaped block; 22, strip-shaped slot; 23, positioning seat; 24, first positioning hole; 25, second positioning hole; 26, positioning pin; 27, pitching adjustment frame; 31, support rod; 32, longitudinal rod; 33, diagonal rod; 34, I-shaped fixing piece; 35, U-shaped bottom support; 37, fixing rod. Embodiment

[0034] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the specification drawings and specific embodiments.

[0035] Please refer to Figures 1 to 11 , in the embodiment of the present invention, an outer layer peeling type beam-column support member includes a beam-column main body 1. Four outer plate bodies 2 distributed in a square are provided on the outer side surface of the beam-column main body 1, and vertical grooves 4 are opened on the inner side surface of the outer plate bodies 2; a push plate assembly is provided inside the vertical grooves 4 to drive the outer plate bodies 2 to move outwards, and a gap filling assembly is provided between adjacent two outer plate bodies 2. This application can effectively relieve the damage of fire to the beam-column, thereby effectively extending the support time of the beam-column main body 1 and providing sufficient time for the rescue work.

[0036] In this embodiment: The push plate assembly specifically includes: two fixed seats 5 arranged side by side vertically. The two fixed seats 5 are respectively fixed at the top and bottom of the side surface of the beam-column main body 1. A through-type stepping lead screw 6 is fixedly connected between the two fixed seats 5. The top and bottom of the outer side surface of the through-type stepping lead screw 6 are symmetrically sleeved and drivingly connected with through-type stepping motors 7. The opposite surfaces of the two through-type stepping motors 7 are fixedly connected with a strip-shaped plate 8. The through-type stepping lead screw 6 penetrates through the strip-shaped plate 8. A movable seat 10 is detachably connected to the middle position of the inner wall on one side of the vertical groove 4. The top and bottom of the two side surfaces of the movable seat 10 are respectively rotatably connected with driving arms 9 between the two strip-shaped plates 8. Through the arranged push plate assembly in this application, the outer plate body 2 can be pushed outwards and unfolded in case of a fire, so as to construct a fireproof barrier outside the beam-column main body 1. Among them, the push plate assembly uses the through-type stepping motor 7 and the driving arm 9 to drive the outer plate body 2 to move outwards. The whole structure is not only simple and efficient, but also occupies less space. Compared with the traditional cylinder drive, the push plate assembly has a larger pushing stroke, can push the newly constructed fireproof barrier formed by deformation to a position farther away from the beam-column main body 1, drive the external fire point directly away, make a peeling action, effectively extend the support time of the beam-column main body 1, play an emergency effect, and provide more time for the rescue work.

[0037] In this embodiment: A strip-shaped clamping block 21 is fixedly connected to the middle position of the outer side surface of the movable seat 10. A strip-shaped clamping groove 22 matching the strip-shaped clamping block 21 is opened at the position of the inner wall on one side of the vertical groove 4 corresponding to the strip-shaped clamping block 21. The strip-shaped clamping block 21 is clamped into the strip-shaped clamping groove 22 and is in interference contact with it.

[0038] In this embodiment: At least three uniformly distributed movable balls 3 are embedded in the top surface and the bottom surface of the outer plate body 2. The setting of the balls 3 facilitates the rapid outward movement of the outer plate body 2.

[0039] In this embodiment: The gap filling assembly specifically includes: a placement groove 12 opened on the side surface of the outer plate body 2. A bladder 13 is arranged between two adjacent placement grooves 12. And a foam injection mechanism is arranged on one side of the bladder 13. Through the arranged gap filling assembly in this application, the gap between adjacent outer plate bodies 2 can be filled when the outer plate body 2 unfolds, so as to prevent the flame from contacting the beam-column main body 1 through the gap, further improve the protection effect on the beam-column main body 1, and thus strive for a longer rescue time.

[0040] In this embodiment: One end of the bladder 13 is detachably connected to the corresponding placement groove 12 through a connecting member, and the other end of the bladder 13 is fixedly connected to the corresponding placement groove 12. Among them, the connecting member includes a positioning seat 23 located inside the corresponding placement groove 12. A first positioning hole 24 is provided on the side surface of the positioning seat 23, and a second positioning hole 25 aligned with the first positioning hole 24 is provided on the outer side surface of the placement groove 12. A positioning pin 26 is inserted into both the first positioning hole 24 and the second positioning hole 25.

[0041] In this embodiment: On both sides of the inner side surface of the outer plate body 2, pitching adjustment frames 27 are movably connected. The pitching adjustment frames 27 are multiple triangular link bodies. The specific structure includes a longitudinal rod 32, an inclined rod 33 sleeved on the longitudinal rod 32, a support rod 31 connecting the longitudinal rod 32 and the inclined rod 33, and a fixed rod 37 movably connected to one end of the inclined rod 33. A plurality of clamping teeth are processed on the fixed rod 37. One end of the support rod 31 is fixedly connected to the bottom of the longitudinal rod 32, and the other end is movably connected to the inclined rod 33. An I-shaped fixing member 34 is provided at the connecting end of the inclined rod 33 and the longitudinal rod 32. The two grooves of the I-shaped fixing member 34 are respectively used for inserting the two outer plate bodies 2. A U-shaped bottom bracket 35 is provided at the lower part of the longitudinal rod 32. The edge of the outer plate body 2 is inserted into the groove of the U-shaped bottom bracket 35. Through the related deformation actions of the pitching adjustment frame 27 unfolding or folding itself, the multi-angle pitching adjustment action of the outer plate body 2 is realized.

[0042] In this embodiment: A foam injection mechanism, specifically including: A column 15 located on one side of the bladder 13. A stirring cavity 16 is provided inside the column 15, and a foaming solvent 17 is filled inside the stirring cavity 16. A rotating motor 18 is embedded below the stirring cavity 16, and the top output shaft of the rotating motor 18 penetrates the bottom end surface of the stirring cavity 16 and is fixedly connected to a stirring shaft 19. A hose 14 is provided for communication between the top of the stirring cavity 16 and the inside of the bladder 13, and a solenoid valve 20 is embedded at the end of the hose 14 communicating with the stirring cavity 16. Through the provided foam injection mechanism of the gap filling component of the present application, a large amount of foam can be injected into the bladder 13 for filling. In this way, not only can the bladder 13 be filled to improve stability, but also the fire prevention ability of the gap where the bladder 13 is located can be improved. In addition, when the flame burns through the bladder 13, a large amount of carbon dioxide and foam filled inside the bladder 13 pour out from the break, thereby achieving the effect of blocking and weakening the fire.

[0043] In this embodiment, the bladder 13 is a gas-filled bladder made of fire-resistant material.

[0044] In this embodiment, the structural form of the bladder 13 is determined according to the design requirements of specific structural components, and it can be an annular bladder or multiple square bladders.

[0045] In this embodiment: The foaming solvent 17 includes an aluminum sulfate solution, a sodium bicarbonate solution, and a foaming agent. After the aluminum sulfate solution and the sodium bicarbonate solution are stirred and mixed, a large amount of carbon dioxide gas and aluminum hydroxide precipitate are generated. The generated carbon dioxide is ejected into the interior of the capsule body 13 together with a large amount of foam generated by the foaming agent (usually a liquid made of hay or Chinese honey locust).

[0046] In this embodiment: The material of the capsule body 13 is selected as a fireproof cloth. The fireproof cloth is a flexible material with excellent fireproof performance. Using it to make the capsule body 13 can effectively play a fireproof role.

[0047] In this embodiment: The material of the outer plate body 2 is selected as asbestos. Asbestos has excellent fireproof effect. The outer plate body 2 made of asbestos has excellent fireproof ability, thus gaining more time for the main beam-column body 1 to prevent being invaded.

[0048] In this embodiment: A fireproof coating 11 is provided on the outer surface of the outer plate body 2. The setting of the fireproof coating 11 can further improve the fireproof ability of the outer plate body 2.

[0049] In this embodiment, a multi-point temperature sensor is provided on the outer wall of the outer plate body 2. The multi-point temperature sensor is arranged in a cross shape, an I shape, a field shape, a T shape, a rectangular array or other arrangement forms around the outer plate body 2 and at the positions of the diagonals in the outer wall of the outer plate body 2. A temperature sensor probe is correspondingly provided at each point. The temperature sensor is an existing sensor product, and its working principle is the same as that of the existing temperature sensor. When a fire ignition point occurs and spreads to the surface of the outer plate body 2, after reaching the temperature threshold preset by the temperature sensor, the temperature sensor transmits a temperature signal to the controller, and the controller controls the through-type stepping motor 7 to start, so as to drive the outer plate body 2 to move outward through the push plate assembly, realizing the peeling process of the main beam-column body 1, separating the fire structure layer, realizing the self-protection process of the beam-column in a short time, ensuring the integrity of the main structure of the building, continuing the integrity of the main structure, and gaining rescue time.

[0050] Furthermore, the outer plaster layer of the outer plate body 2 covers each multi-point temperature sensor, realizing the surface protection effect on the multi-point temperature sensor.

[0051] Furthermore, the set range of the temperature threshold of the temperature sensor is 350 to 450 °C.

[0052] Another control form is that after more than 60% of the temperature sensors in the multi-point temperature sensor send out temperature signals, the controller controls the through-type stepping motor 7 to start, and then controls the push plate assembly to drive the outer plate body 2 to move outward, thereby extending the rescue time by at least a few seconds and at most dozens of seconds.

[0053] Furthermore, the controller can also control the opening and closing of the rotary motor 18. The controller is centrally installed in the distribution box on the outer wall of the outer plate body 2 or at other positions, which is convenient for regular inspection and maintenance. The control principles of the controller, temperature sensor, rotary motor 18, and through-type stepping motor 7 are existing electric control principles.

[0054] Furthermore, the controller can also control the opening and closing of the solenoid valve 20. The controller is centrally installed in the distribution box on the outer wall of the outer plate body 2 or at other positions, which is convenient for regular inspection and maintenance. The control principles among the controller, temperature sensor, rotary motor 18, through-type stepping motor 7, and solenoid valve 20 are existing electric control principles.

[0055] Working principle:

[0056] When a fire point appears and spreads to the outer wall of the outer plate body 2, when the outer wall of the outer plate body 2 burns and contacts the temperature sensor, the temperature sensor transmits the collected temperature signal to the controller, and the controller controls the through-type stepping motor 7 to start.

[0057] The working principle of the present invention is:

[0058] When a fire occurs, the two through-type stepping motors 7 on each through-type ball screw 6 operate to move closer to each other. During this process, the driving arm 9 between the strip plate 8 and the moving seat 10 rotates relatively, and the rotating driving arm 9 pushes the moving seat 10 to move outward. Since the moving seat 10 is fixedly connected to the outer plate body 2, the outer plate body 2 follows and moves outward. During the movement of the outer plate body 2, the bladder 13 originally folded inside the placement groove 12 is also pulled out. After the outer plate body 2 moves to a preset distance, the four unfolded outer plate bodies 2 cooperate with the bladder 13 to construct a fireproof barrier outside the beam-column main body 1. At the same time, the rotary motor 18 drives the stirring shaft 19 to rotate, the foaming solvent 17 in the stirring chamber 16 reacts, the solenoid valve 20 opens, and a large amount of carbon dioxide generated by the foaming solvent 17 is sprayed into the inside of the bladder 13 together with the foam. This can not only fill the bladder 13 to improve stability but also improve the fireproof ability of the gap where the bladder 13 is located. In addition, when the flame burns through the bladder 13, a large amount of carbon dioxide and foam filled inside the bladder 13 pour out from the break, thereby blocking the fire or even extinguishing the fire, and effectively extending the support time of the beam-column main body 1, providing sufficient time for rescue work.

[0059] In addition, when users at the fire site want to contain the fire on one side around the beam-column main body 1 to protect property from damage, first loosen one of the bladder bodies 13 at both ends of the outer plate body 2 on this side, that is, select to pull out one of the positioning pins 26 at both ends of the outer plate body 2. After the positioning pin 26 disengages from the corresponding first positioning hole 24 and the second positioning hole 25, the originally surrounding fire barrier is disconnected here. Then remove the outer plate bodies 2 on the other three sides except this side, that is, pull the outer plate body 2 outwards so that the strip-shaped clamping block 21 disengages from the strip-shaped clamping groove 22. Subsequently, move the outer plate bodies 2 on the other three sides to align them with another outer plate body 2, and finally unfold the pitching adjustment frame 27 to support the outer plate bodies 2 on the other three sides. It should be noted that when moving the outer plate body 2, the column 15 also needs to be moved. In this adjustment method, the four outer plate bodies 2 are connected as a whole to form a long fireproof enclosure, thus effectively blocking the fire from this side and protecting the users' property from loss. The formed enclosure after unfolding can isolate the fire area and prevent the spread of the fire. On the basis of active fire extinguishing, it further assists in fire extinguishing, and at the same time can isolate and protect a part of the property in the fire area to reduce losses. After a fire occurs, the property can be quickly partitioned and protected and then the personnel can be evacuated to minimize the losses caused by the fire. If some people in the fire area cannot be evacuated in time after the fire occurs, the above-mentioned unfolding and partitioning method can also be adopted to partition the fire area. The people who cannot escape in time can temporarily take shelter behind the enclosure and wait for rescue, providing a temporary shelter position and space for the personnel, which can extend the rescue time and increase the chance of being rescued.

[0060] The installation and disassembly of the outer plate body 2 are simple. After being used in a fire once, it can be disassembled as a whole and replaced, with a relatively low cost. Moreover, it does not affect the normal load-bearing use of the beam-column. It is applicable to a variety of use environments and different use places, and has strong adaptability.

[0061] The use of the present invention can extend the protection time of the beam-column main body 1 from the start of the fire to the time of burning itself for at least half a minute and at most 5 - 8 minutes of complete and effective time, striving for effective protection of the building main body. When the rescue is timely and the damage degree to the beam-column main body 1 is not large, the beam-column main body 1 can be continued to be used by configuring new push plate components and gap filling components outside it. It saves the building repair materials and costs.

[0062] In the present invention, the specific set shapes of the outer plate body 1, the push plate components and the gap filling components can be arranged according to the specific outer shapes and relevant structural design dimensions of the beam and column structures in the building, or the outer plate body 1, the push plate components and the gap filling components can be correspondingly configured by selecting the main supporting components in the building.

[0063] The usage modes of the present invention are diverse. According to different fire situations and specific circumstances, operation deformations are selected to conduct stripping isolation protection on the building beams and columns, with the performance of self-separation rescue for the building in case of emergencies. After use, corresponding repairs can be carried out and it can be put into subsequent use. While maintaining the basic usage performance of the building, the emergency operation performance for dealing with fires or other emergencies is increased.

[0064] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

[0065] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An outer layer stripping type beam-column support member, characterized in that It includes a beam-column main body (1), and four outer plate bodies (2) distributed in a square are provided on the outer side surface of the beam-column main body (1), and vertical grooves (4) are formed on the inner side surfaces of the outer plate bodies (2); a push plate assembly for driving the outer plate bodies (2) to move outwards is arranged inside the vertical grooves (4), and a gap filling assembly is arranged between two adjacent outer plate bodies (2). The push plate assembly includes two fixed seats (5) arranged side by side up and down. The two fixed seats (5) are respectively fixed at the top end and the bottom end of the side surface of the beam-column main body (1). A through-type stepping screw rod (6) is fixedly connected between the two fixed seats (5). The top end and the bottom end of the outer side surface of the through-type stepping screw rod (6) are symmetrically sleeved and drivingly connected with through-type stepping motors (7). A strip-shaped plate (8) is fixedly connected to the opposite surfaces of the two through-type stepping motors (7). The through-type stepping screw rod (6) penetrates through the strip-shaped plate (8). A movable seat (10) is detachably connected to the middle position of one inner wall side of the vertical groove (4), and driving arms (9) are respectively rotatably connected between the top end and the bottom end of the two side surfaces of the movable seat (10) and the two strip-shaped plates (8). At least three uniformly distributed movable balls (3) are embedded in the top end surface and the bottom end surface of the outer plate body (2). A plurality of temperature sensors are arranged on the outer wall of the outer plate body (2). A controller is arranged in cooperation with the plurality of temperature sensors. Each temperature sensor is electrically connected to the through-type stepping motor (7) through the controller. The gap filling assembly includes: a placement groove (12) formed on the side surface of the outer plate body (2). A bladder (13) is arranged between two adjacent placement grooves (12), and a foam injection mechanism is arranged on one side of the bladder (13). The foam injection mechanism includes: a column (15) located on one side of the bladder (13). A stirring cavity (16) is formed inside the column (15), and a foaming solvent (17) is filled inside the stirring cavity (16). A rotary motor (18) is embedded below the stirring cavity (16), and the top output shaft of the rotary motor (18) penetrates through the bottom end surface of the stirring cavity (16) and is fixedly connected to a stirring shaft (19). A hose (14) is arranged to communicate between the top of the stirring cavity (16) and the inside of the bladder (13), and a solenoid valve (20) is embedded at one end of the hose (14) communicating with the stirring cavity (16). The foaming solvent (17) includes an aluminum sulfate solution, a sodium bicarbonate solution and a foaming agent.

2. The outer layer peeling type beam-column support member according to claim 1, characterized in that, The bladder (13) is an air-filled bladder made of fireproof cloth.

3. The outer layer peelable beam-column support member according to claim 1, wherein, The outer plate body (2) is an asbestos board.

4. The outer layer peeling type beam-column support member according to claim 1 or 3, characterized in that, A fireproof coating (11) is arranged on the outer surface of the outer plate body (2).

5. A method for self-isolating fire in a building structure, which is realized by using an outer-layer peeling beam-column support member described in claim 1, characterized in that, The self-isolation fire method of the building structure is as follows: When a fire point appears and spreads to the outer wall of the outer plate body (2), when the outer wall of the outer plate body (2) burns and contacts the temperature sensor, the temperature sensor transmits the collected temperature signal to the controller, and the controller controls the start of the through-type stepping motor (7), so that the two through-type stepping motors (7) on each through-type lead screw (6) operate closer to each other, that is, the driving arm (9) between the strip plate (8) and the moving seat (10) rotates relatively, and the rotating driving arm (9) pushes the moving seat (10) to move outward, and the moving seat (10) drives the outer plate body (2) to move outward synchronously. The moving force of the outer plate body (2) serves as a pulling force to pull the bladder (13) folded inside the placement groove (12). After the outer plate body (2) moves to a preset distance of at least 30 cm, the four unfolded outer plate bodies (2) cooperate with the bladder (13) to construct an outward-expanding fire protection barrier sleeve outside the beam-column main body (1). The rotation motor (18) starts, the rotation motor (18) drives the stirring shaft (19) to rotate, the foaming solvent (17) in the stirring cavity (16) reacts, the solenoid valve (20) is opened, and a large amount of carbon dioxide generated by the foaming solvent (17) together with the foam is ejected and enters the inside of the bladder (13) to form an inner isolation protection inner core. When the flame burns through the bladder (13), a large amount of carbon dioxide and foam filled inside the bladder (13) pour out from the break to form a protective sandwich layer to block the spread of the fire to the beam-column main body (1).

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