A new type of fire curtain

Abstract

The present application discloses a novel fireproof curtain, which comprises a fireproof curtain body. The fireproof curtain body is composed of an inner layer, a middle layer and an outer layer which are sequentially overlapped; the inner layer is composed of at least one layer of polyether ether ketone layer, polyphenylene sulfide layer, polytetrafluoroethylene layer or PFA layer; the middle layer is composed of at least one layer of heat-resistant metal plate layer, carbon fiber layer, graphite layer, high-temperature resistant fiber fabric layer or high-temperature resistant coated fabric layer; the outer layer is composed of at least one layer of silicone rubber coated fabric layer and high-temperature resistant composite fabric layer. The beneficial effects of the present invention are as follows: the novel fireproof curtain of the present invention effectively solves the drawback that a large amount of spark carbon deposits accumulate on the fireproof curtain, reducing the service life of the fireproof curtain; when using the fireproof curtain of the present invention, when the spark carbon deposits adhere to a certain volume and weight on the inner layer of the fireproof curtain (the density reaches 3.53 g / cm3), the spark carbon deposits will fall off automatically with the increase of its own weight and the impact of subsequent sparks.

Description

Technical Field

[0001] The present application relates to a fireproof curtain, specifically a novel fireproof curtain. Background Art

[0002] During the operation of track grinding equipment, a large amount of grinding sparks will be generated. These sparks have characteristics such as high temperature, fast flying speed, long flying distance, and strong impact force. During continuous grinding operations, the amount of sparks generated is huge. The high-temperature carbon deposits formed by these sparks will adhere to the surface of surrounding equipment and are difficult to fall off. At the same time, if the spark protection device fails and is damaged in advance, the high-speed sparks will be ejected from the defect of the protection device to the outside of the railway track and subgrade. If there are combustibles in contact with these sparks, the risk of fire is very high.

[0003] In the existing protection technologies, the fireproof curtain adopted is a single-layer structure, made of silicone rubber composite fiberglass fabric or silicone rubber composite carbon fiber fabric. This material is hung near the grinding mechanism to block the grinding sparks and reduce the splashing of sparks outside the vehicle body. However, during actual grinding operations, the fireproof curtain with a single function and structure is prone to burning through due to its low temperature resistance, and at the same time, a large amount of cooled sparks will accumulate and adhere to the surface. The accumulated cooled sparks increase the self-weight of the fireproof curtain, causing the surface coating material of the fireproof curtain to tear and peel off in pieces, greatly reducing the service life of the fireproof curtain. As a result, this type of fireproof curtain needs to be frequently replaced during operation, greatly increasing the on-site workload and the user's usage cost. If the replacement is not timely, the high-temperature and high-speed sparks will rush out of the vehicle body, easily burning the staff or causing a fire. It can be said that the protection against railway grinding sparks has become a stubborn problem. Summary of the Invention

[0004] The main purpose of the present application is to provide a novel fireproof curtain that can reduce the amount of spark contact and effectively solve the problem of a large amount of spark carbon deposits adhering to the fireproof curtain.

[0005] In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

[0006] The present invention provides a novel fireproof curtain, including a fireproof curtain body, and the fireproof curtain body is composed of an inner layer, an intermediate layer, and an outer layer that are sequentially overlapped;

[0007] The inner layer is composed of at least one layer of polyether ether ketone layer, polyphenylene sulfide layer, polytetrafluoroethylene layer, or PFA layer;

[0008] The intermediate layer is composed of at least one layer of heat-resistant metal plate layer, composite metal plate layer with an organic resin coating thickness of 25 - 35μm, carbon fiber layer, graphite layer, high-temperature resistant fiber fabric layer, or high-temperature resistant coated fabric layer;

[0009] The outer layer is composed of at least one of a silicone rubber coated fabric layer and a high temperature resistant composite fabric layer.

[0010] When each layer forming the fireproof curtain body contains a multi-layer structure, the multi-layer structures are fixedly connected by sewing.

[0011] In a preferred embodiment of the above-mentioned new type of fireproof curtain, the heat-resistant metal plate layer is made of a heat-resistant metal plate with a Ni content ≥ 3.5%; the high temperature resistant fiber fabric layer is made of a high temperature resistant fiber fabric with a SiO2 content ≥ 42%; the coating layer of the high temperature resistant coated fabric layer has a heat resistance temperature ≥ 250°C; the silicone rubber coated fabric layer is a fabric coated with silicone rubber with a SiO2 content ≥ 42%; the high temperature resistant composite fabric layer is a high temperature resistant composite single-zero aluminum foil or PTFE fabric layer.

[0012] The polyether ether ketone layer is made of polyether ether ketone. Polyether ether ketone is a high polymer composed of repeating units containing a ketone bond and two ether bonds in the main chain structure, belonging to special polymer materials. It has physical and chemical properties such as resistance to chemical corrosion and is a type of semi-crystalline polymer material. In addition, polyether ether ketone has outstanding sliding characteristics among all plastics and is suitable for applications with strict requirements for low coefficient of friction and wear resistance.

[0013] The polyphenylene sulfide layer is made of polyphenylene sulfide. Polyphenylene sulfide is the largest variety of special engineering plastics and is known as the "sixth largest engineering plastic in the world" after polycarbonate, polyester, polyoxymethylene, nylon, and polyphenylene ether, and is also one of the eight aerospace materials. Since the benzene ring and sulfur atom on the main chain of polyphenylene sulfide form conjugation and the sulfur atom is not saturated, oxidation can change the thioether bond into a sulfoxide group and a sulfone group, or the benzene ring and adjacent macromolecules form an oxygen bridge for branching or cross-linking, but the main chain is not broken. Therefore, it has outstanding thermal oxygen stability, with a maximum continuous use temperature of up to 260°C and a thermal decomposition temperature of up to 522°C.

[0014] The polytetrafluoroethylene layer is made of polytetrafluoroethylene. Polytetrafluoroethylene, commonly known as the "king of plastics", is a polymer obtained by polymerizing tetrafluoroethylene as a monomer. It has excellent heat resistance and cold resistance and can be used for a long time at - It has the lowest coefficient of friction among solid materials, has high lubricity, does not adhere, and has the smallest surface tension among solid materials and does not adhere to any substances.

[0015] The PFA layer is made of PFA. PFA, tetrafluoroethylene, is a copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene. The melt bonding property is enhanced, the melt viscosity decreases, and the performance remains unchanged compared with polytetrafluoroethylene. This resin can be directly processed into products by ordinary thermoplastic forming methods. It has the lowest coefficient of friction among plastics and a long-term use temperature of -80 - 260°. In addition, PFA also has good electrical properties, and its electrical insulation is not affected by temperature.

[0016] Carbon fiber is a high-strength and high-modulus fiber with a carbon content of over 90%. It ranks first among all chemical fibers in terms of high-temperature resistance.

[0017] Graphite is an allotrope of carbon. It is a grayish-black, opaque solid with stable chemical properties and corrosion resistance. It is one of the most heat-resistant minerals.

[0018] The material forming the inner layer: It has a uniform organizational structure and high-temperature resistance characteristics. This layer of material is not easily burned when subjected to grinding spark impact. And when the fireproof curtain is used vertically, when the spark carbon deposits on the surface of the inner layer material reach a certain volume and weight, the spark carbon deposits with a relatively high density of 3.53 g / cm 3 (Experimentally measured data) The spark carbon deposits will fall off automatically with the increase of their own weight and subsequent spark impact, which can extend the service life of the fireproof curtain.

[0019] The material forming the middle layer: It has the characteristics of high-temperature resistance and high thermal conductivity. When the inner layer material is subjected to high-temperature impact, the high-thermal-conductivity material in the middle layer will accelerate the transfer of heat from the inner layer, so that the inner layer material will not burn due to a soaring temperature when subjected to spark impact for a long time.

[0020] The material forming the outer layer: It is the backup force of the entire fireproof curtain fire protection system, forming the third line of defense against spark impact, and at the same time preventing damage to the structure of the fireproof curtain by external forces such as tools and roadbed stones.

[0021] For the above-mentioned new type of fireproof curtain, as a preferred implementation scheme, the thickness of the inner layer of the fireproof curtain body is 0.2 - 3 mm, the thickness of the middle layer of the fireproof curtain body is 0.02 - 3 mm, and the thickness of the outer layer of the fireproof curtain body is 0.2 - 3 mm.

[0022] The stepped fireproof curtain utilizes the relationship that the spark temperature is inversely proportional to the flight distance, increasing the distance between the spark and the surface of the fireproof curtain, and reducing the temperature at which the spark contacts the fireproof curtain.

[0023] For the above-mentioned new type of fireproof curtain, as a preferred implementation scheme, the inner layer, the middle layer and the outer layer are fixedly connected by bolts, nuts, eyelets or rivets;

[0024] Preferably, the middle layer and the outer layer are fixedly connected by sewing, and the outer edges of the middle layer and the outer layer are wrapped with a metal mesh.

[0025] The four corners of the inner layer, the middle layer and the outer layer are fixedly connected by bolts, nuts, eyelets or rivets. To make the connection more firm, the number of connections of the connecting device can be increased according to the size of the fireproof curtain.

[0026] The outer edges of the middle layer and the outer layer are wrapped with a metal mesh. During the use of the fireproof curtain, its outer edges may be worn. To extend its service life, the outer edges of the middle layer and the outer layer are wrapped with a metal mesh.

[0027] In the above-mentioned novel fireproof curtain, as a preferred embodiment, a number of fireproof buffer members are rotatably connected to the fireproof curtain body and are arranged in parallel. The fireproof buffer members are arranged in the anti-spark area of the fireproof curtain body.

[0028] The plane where a number of fireproof buffer members arranged in parallel is parallel to the anti-spark surface of the fireproof curtain body.

[0029] Preferably, the distance between two adjacent fireproof buffer members in the same row is ≤ 120 mm. Preferably, the distance between two adjacent fireproof buffer members in the same row is 2 - 120 mm.

[0030] In the above-mentioned novel fireproof curtain, as a preferred embodiment, the shape of the fireproof curtain body is flat; the top of the fireproof buffer member is connected to the top of the fireproof curtain body through a first support rod. One end of the first support rod is fixed perpendicular to the top of the fireproof curtain body, and the other end of the first support rod is rotatably connected to the top of the fireproof buffer member.

[0031] More preferably, the first support rod and the fireproof buffer member are connected through a fixing member. The fixing member sequentially passes through the fireproof buffer member and the first support rod to realize the connection between the first support rod and the fireproof buffer member.

[0032] In the above-mentioned novel fireproof curtain, as a preferred embodiment, the bottom of the fireproof buffer member is connected to the bottom of the fireproof curtain body through a second support rod. One end of the second support rod is fixed perpendicular to the bottom of the fireproof curtain body, and the other end of the second support rod is rotatably connected to the bottom of the fireproof buffer member.

[0033] More preferably, the second support rod and the fireproof buffer member are connected through a fixing member. The fixing member sequentially passes through the fireproof buffer member and the second support rod to realize the connection between the second support rod and the fireproof buffer member.

[0034] At the front anti-spark area of the fire curtain, there is arranged one row or multiple rows of fireproof buffer members with regular arrangement. These fireproof buffer members play the role of dispersing the concentrated impact force of sparks and alleviating the impact tolerance state of materials. That is, when the sparks impact the fire curtain, the sparks will first come into contact with the fireproof buffer members. Affected by the impact of the sparks and the wind force generated during vehicle operation, adjacent fireproof buffer members are deflected by the wind pressure into similar angles at the same time. According to Bernoulli's theorem and formula in fluid mechanics, that is, when an incompressible and ideal fluid flows steadily along a flow tube, as the flow velocity increases, the static pressure of the fluid will decrease; conversely, as the flow velocity decreases, the static pressure of the fluid will increase. The equation expression is p+(1 / 2)xρv^2+ρgh = constant (p, v, ρ are respectively the pressure, flow velocity and fluid density at a certain point inside the ideal fluid, h is the height of this point, and g is the acceleration due to gravity). Due to the high-speed fluid passing by, the air pressure between adjacent fireproof buffer members becomes smaller, causing the members to partially or completely fit together. Then, due to the action of gravity, the members will separate from each other automatically (as shown in Figure 8). At the same time, the length of the fixing member of the fireproof buffer member ≤ 100mm. The shorter the length of the fixing member, the higher the swing frequency of the fireproof buffer member, and the better the shunting effect on the sparks. According to the principle of the period of a simple pendulum: T = 2π√(L / g), under a very small amplitude (angle), the period of a simple pendulum performing simple harmonic motion is proportional to the square root of the pendulum length and inversely proportional to the square root of the acceleration due to gravity, and has nothing to do with the amplitude and the mass of the pendulum bob. The combined action of Bernoulli's law, the principle of gravity and the principle of a simple pendulum makes the fireproof buffer member unable to be in a static state. Finally, the fireproof buffer member will present motion states such as swinging, deflecting and rotating during operation, realizing the turbulent flow, shunting and blocking of the oncoming high-speed sparks, greatly reducing the amount of sparks contacting the rear fire curtain; effectively realizing the turbulent flow and shunting of high-speed sparks, and reducing the impact amount of sparks on the rear fire curtain by 65%.

[0035] For the above-mentioned novel fire curtain, as a preferred implementation scheme, the shape of the fire curtain body is stepped;

[0036] Preferably, the top of the fireproof buffer member is suspended and connected to the top of the fire curtain body through a fixing member. One end of the fixing member is fixedly connected to the top of the fire curtain body, and the other end of the fixing member is fixedly connected to the top of the fireproof buffer member to realize the rotational connection between the fireproof buffer member and the fire curtain.

[0037] For the above-mentioned novel fire curtain, as a preferred implementation scheme, both the first support rod and the second support rod are made of metal, and the fixing member is a metal wire, a metal rope or a non-metallic high-temperature resistant rope; preferably, both the first support rod and the second support rod are made of 304 stainless steel metal, and the fixing member is a metal wire.

[0038] The above-mentioned novel fireproof curtain, as a preferred embodiment, the fireproof buffer is composed of at least one of a polyether ether ketone plate, a polytetrafluoroethylene plate, a composite metal plate with an organic resin coating thickness of 25-35μm, a polyphenylene sulfide plate, a PFA plate, a carbon fiber plate, a graphite plate, a silicone rubber-coated fabric layer, a high-temperature resistant fiber fabric plate or a high-temperature resistant coated fabric plate;

[0039] Preferably, the shape of the fireproof buffer is rectangular; the shape of the fireproof buffer can also be a derivative shape (spiral shape) based on a rectangle, such as a combination of a rectangle and a triangle, a rhombus or a circle.

[0040] More preferably, the shape of the fireproof buffer is cylindrical, and a rectangular shunt piece is vertically arranged on the cylindrical fireproof buffer, and the rectangular shunt pieces are uniformly arranged around the cylindrical fireproof buffer.

[0041] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0042] 1. The novel fireproof curtain of the present invention effectively solves the drawback that a large amount of spark carbon deposits accumulate on the fireproof curtain, reducing the service life of the fireproof curtain; when using the fireproof curtain of the present invention, when the spark carbon deposits adhere to a certain volume and weight on the inner layer of the fireproof curtain (density reaches 3.53 g / cm 3 ), the spark carbon deposits will fall off automatically with the increase of their own weight and the subsequent impact of sparks.

[0043] 2. The fireproof buffer is arranged on the inner side of the novel fireproof curtain of the present application, which is equivalent to adding a firewall on the inner side of the fireproof curtain, delaying the burning time of the fireproof curtain; under the impact of high-speed sparks and the wind force generated by the rotation of the grinding wheel, the fireproof buffer will swing or rotate regularly, generating a cutting and shunting effect on the spark flow, so that the sparks contact the fireproof curtain at an incident angle less than 90 degrees vertically. When impacted by the spark flow with an incident angle less than 90 degrees, the impact force on the surface of the fireproof curtain is weakened, and the frictional force between the sparks and the surface of the fireproof curtain is reduced, better protecting the integrity of the surface of the fireproof curtain. In addition, the contact surface between the sparks and the fireproof buffer is not fixed, thus reducing the probability of damage caused by local overheating of the fireproof buffer due to continuous impact of sparks on a single point. The fireproof buffer blocks about 65% of the spark volume, effectively reducing the amount of spark contact on the surface of the fireproof curtain, reducing the probability of the fireproof curtain being burned, and extending the service life of the fireproof curtain.

[0044] 3. A criss-cross maze structure is formed between the fireproof buffers. Even if some sparks pass through the fireproof buffer, the flying speed of the sparks is reduced, and the reaction force of the sparks contacting the surface of the fireproof curtain is correspondingly reduced, narrowing the splashing range of the sparks and reducing the hidden danger of secondary fires caused by the rapid rebound and splashing of the sparks. Description of the Drawings

[0045] Figure 1 Schematic structural diagram when the fireproof buffer of the novel fireproof curtain described in Embodiment 4 of the present application is rectangular;

[0046] Figure 2 Schematic structural diagram when the fireproof buffer of the novel fireproof curtain described in Embodiment 4 of the present application is spiral;

[0047] Figure 3 Schematic structural diagram when the fireproof buffer of the novel fireproof curtain described in Embodiment 5 of the present application is rectangular;

[0048] Figure 4 Schematic structural diagram when the fireproof buffer of the novel fireproof curtain described in Embodiment 5 of the present application is spiral;

[0049] Figure 5 Schematic structural diagram when the fireproof buffer of the novel fireproof curtain described in Embodiment 5 of the present application is cylindrical;

[0050] Figure 6 Schematic structural diagram when the fireproof buffer of the novel fireproof curtain described in Embodiment 6 of the present application is rectangular;

[0051] Figure 7 Schematic structural diagram when the fireproof buffer of the novel fireproof curtain described in Embodiment 6 of the present application is spiral;

[0052] Figure 8 is the schematic diagram of the movement principle of the fireproof buffer; Figure 8a Schematic structural diagram when the fireproof buffer is in a state without fluid; Figure 8b Schematic structural diagram when the fluid passes through the fireproof buffer and the pressure decreases.

[0053] In the figure: 1, fixing hole; 2, fireproof curtain body; 3, first support rod; 4, fixing piece; 5, fireproof buffer; 6, second support rod. Detailed implementation manners

[0054] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the cases. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0055] The present invention provides a novel fireproof curtain, including a fireproof curtain body 2, and the fireproof curtain body 2 is composed of an inner layer, an intermediate layer and an outer layer which are sequentially overlapped;

[0056] The inner layer is composed of at least one layer of polyether ether ketone layer, polyphenylene sulfide layer, polytetrafluoroethylene layer or PFA layer;

[0057] The intermediate layer is composed of at least one layer of a heat-resistant metal plate layer, a composite metal plate layer with an organic resin coating film thickness of 25 - 35 μm, a carbon fiber layer, a graphite layer, a high-temperature resistant fiber fabric layer, or a high-temperature resistant coated fabric layer;

[0058] The outer layer is composed of at least one layer of a silicone rubber coated fabric layer or a high-temperature resistant composite fabric layer.

[0059] Since the inner layer (the layer in contact with the sparks) of the novel fireproof curtain described in this application is composed of a polyether ether ketone layer, a polyphenylene sulfide layer, a polytetrafluoroethylene layer, or a PFA layer, the inner layer of the novel fireproof curtain described in this application has good non-stickiness, which can effectively prevent spark carbon deposition from adhering to the fireproof curtain and damaging the fireproof curtain, shortening its service life.

[0060] As a preferred embodiment, the heat-resistant metal plate layer is made of a heat-resistant metal plate with a Ni content of ≥ 3.5%; the high-temperature resistant fiber fabric layer is made of a high-temperature resistant fiber fabric with an SiO2 content of ≥ 42%; the coating layer of the high-temperature resistant coated fabric layer has a heat-resistant temperature of ≥ 250 °C; the silicone rubber coated fabric layer is a fabric coated with silicone rubber with an SiO2 content of ≥ 42%; the high-temperature resistant composite fabric layer is a high-temperature resistant composite single-zero aluminum foil or a PTFE fabric layer.

[0061] As a preferred embodiment, the thickness of the inner layer of the fireproof curtain body 2 can be 0.2 mm, 0.8 mm, 1.5 mm, 2 mm, 2.5 mm, or 3 mm; the thickness of the intermediate layer of the fireproof curtain body 2 can be 0.02 mm, 0.05 mm, 0.2 mm, 0.4 mm, 0.8 mm, 1.2 mm, 2.0 mm, 2.5 mm, or 3.0 mm; the thickness of the outer layer of the fireproof curtain body 2 can be 0.2 mm, 0.8 mm, 1.2 mm, 2.0 mm, 2.5 mm, or 3.0 mm.

[0062] As a preferred embodiment, the inner layer, the intermediate layer, and the outer layer are fixedly connected by bolts, nuts, eyelets, or rivets; to make the fixation between the intermediate layer and the outer layer more firm, the intermediate layer and the outer layer are fixedly connected by sewing, and the outer edges of the intermediate layer and the outer layer are wrapped with a metal mesh.

[0063] In the embodiment of this application, the fireproof buffer member 5 used can be composed of at least one of a polyether ether ketone plate, a polytetrafluoroethylene plate, a composite metal plate layer with an organic resin coating film thickness of 25 - 35 μm, a polyphenylene sulfide plate, a PFA plate, a carbon fiber plate, a graphite plate, a silicone rubber coated fabric layer, a high-temperature resistant fiber fabric plate, or a high-temperature resistant coated fabric plate.

[0064] The inner layer of the fireproof curtain described in this application is the layer that directly contacts the sparks of the fireproof curtain.

[0065] Example 1

[0066] The shape of the fireproof curtain body 2 described in Example 1 is flat, and the fireproof curtain body 2 is composed of an inner layer, an intermediate layer, and an outer layer that are sequentially overlapped;

[0067] The inner layer is a polyetheretherketone layer;

[0068] The intermediate layer is a carbon fiber layer;

[0069] The outer layer is a high-temperature resistant composite fabric layer.

[0070] Example 2

[0071] The shape of the fireproof curtain body 2 described in Example 2 is flat, and the fireproof curtain body 2 is composed of an inner layer, an intermediate layer, and an outer layer that are sequentially overlapped;

[0072] The inner layer is a polytetrafluoroethylene layer;

[0073] The intermediate layer is a graphite layer;

[0074] The outer layer is a high-temperature resistant composite fabric layer.

[0075] Example 3

[0076] The shape of the fireproof curtain body 2 described in Example 3 is stepped, and the fireproof curtain body 2 is composed of an inner layer, an intermediate layer, and an outer layer that are sequentially overlapped,

[0077] The inner layer is a polytetrafluoroethylene layer;

[0078] The intermediate layer is composed of a carbon fiber layer and a graphite layer combined, the carbon fiber layer and the graphite layer are overlapped, and the edges of the carbon fiber layer and the graphite layer are sewn and fixedly connected;

[0079] The outer layer is a silicone rubber coated fabric layer.

[0080] Example 4

[0081] The shape of the fireproof curtain body 2 described in Example 4 is flat, and a plurality of parallel fireproof buffer members 5 are rotatably connected to the fireproof curtain body 2, and the fireproof buffer members 5 are arranged in the anti-spark area of the fireproof curtain; the planes where the plurality of parallel fireproof buffer members 5 are located are parallel to the anti-spark surface of the fireproof curtain body 2;

[0082] Preferably, the distance between two adjacent fireproof buffer members 5 in the same row can be 2mm, 5mm, 10mm, 20mm, 50mm, 80mm, 100mm or 120mm.

[0083] To achieve the rotation of the fireproof buffer member 5, the top of the fireproof buffer member 5 is connected to the top of the fireproof curtain body 2 through a first support rod 3. One end of the first support rod 3 is fixed perpendicular to the top of the fireproof curtain body 2, and the other end of the first support rod 3 is rotatably connected to the top of the fireproof buffer member 5. To achieve the free rotation of the fireproof buffer member 5, the first support rod 3 and the fireproof buffer member 5 are connected through a fixing member 4. The fixing member 4 sequentially passes through the fireproof buffer member 5 and the first support rod 3 to realize the connection between the first support rod 3 and the fireproof buffer member 5. Since the first support rod 3 needs to have a certain high-temperature resistance performance, as a preferred implementation, the first support rod 3 is made of metal. More preferably, the first support rod 3 is made of 304 stainless steel metal. The fixing member 4 is a metal wire, a metal rope or a non-metallic high-temperature resistant rope. More preferably, the fixing member 4 is a metal wire. In this way, when a spark hits the fireproof buffer member 5, due to the certain twist of the fixing member 4, it will drive the fireproof buffer member 5 to rotate.

[0084] The shape of the fireproof buffer member 5 can be rectangular, spiral or cylindrical. A rectangular shunt piece is vertically arranged on the cylindrical fireproof buffer member 5, and the rectangular shunt pieces are evenly arranged around the cylindrical fireproof buffer member 5.

[0085] Example 5

[0086] In Example 5, the shape of the fireproof curtain body 2 is flat, and a plurality of parallel fireproof buffer members 5 are rotatably connected to the fireproof curtain body 2. The fireproof buffer members 5 are arranged in the anti-spark area of the fireproof curtain. The planes where the plurality of parallel fireproof buffer members 5 are located are parallel to the anti-spark surface of the fireproof curtain body 2.

[0087] Preferably, the distance between two adjacent fireproof buffer members 5 in the same row can be 2 mm, 5 mm, 10 mm, 20 mm, 50 mm, 80 mm, 100 mm or 120 mm.

[0088] To achieve the rotation of the fireproof buffer member 5, the top of the fireproof buffer member 5 is connected to the top of the fireproof curtain body 2 through a first support rod 3. One end of the first support rod 3 is fixed perpendicular to the top of the fireproof curtain body 2, and the other end of the first support rod 3 is rotatably connected to the top of the fireproof buffer member 5. To achieve the free rotation of the fireproof buffer member 5, the first support rod 3 and the fireproof buffer member 5 are connected through a fixing member 4. The fixing member 4 sequentially passes through the fireproof buffer member 5 and the first support rod 3 to realize the connection between the first support rod 3 and the fireproof buffer member 5;

[0089] The bottom of the fireproof buffer member 5 is connected to the bottom of the fireproof curtain body 2 through a second support rod 6. One end of the second support rod 6 is fixed perpendicular to the bottom of the fireproof curtain body 2, and the other end of the second support rod 6 is rotatably connected to the bottom of the fireproof buffer member 5;

[0090] The second support rod 6 and the fireproof buffer member 5 are connected through a fixing member 4. The fixing member 4 sequentially passes through the fireproof buffer member 5 and the second support rod 6 to realize the connection between the second support rod 6 and the fireproof buffer member 5.

[0091] Since both the first support rod 3 and the second support rod 6 need to have certain high-temperature resistance performance, as a preferred implementation, both the first support rod 3 and the second support rod 6 are made of metal. More preferably, the first support rod 3 is made of 304 stainless steel metal, and the fixing member 4 is a metal wire;

[0092] The shape of the fireproof buffer member 5 can be rectangular, spiral or cylindrical. A rectangular flow dividing piece is vertically arranged on the cylindrical fireproof buffer member 5, and the rectangular flow dividing pieces are uniformly arranged around the cylindrical fireproof buffer member 5.

[0093] Example 6

[0094] The shape of the fireproof curtain body 2 in Example 6 is trapezoidal. A plurality of fireproof buffer members 5 arranged in parallel are rotatably connected to the fireproof curtain body 2, and the fireproof buffer members 5 are arranged in the anti-spark area of the fireproof curtain body 2; the planes where the plurality of fireproof buffer members 5 arranged in parallel are located are parallel to the anti-spark surface of the fireproof curtain body 2;

[0095] Preferably, the distance between two adjacent fireproof buffer members 5 in the same row can be 2mm, 5mm, 10mm, 20mm, 50mm, 80mm, 100mm or 120mm.

[0096] The top of the fireproof buffer member 5 is connected to the top of the fireproof curtain body 2 through a fixing member 4 in a hanging manner. One end of the fixing member 4 is fixedly connected to the top of the fireproof curtain body 2 (the top of the trapezoidal fireproof curtain is: when the fireproof curtain is in use, the surface perpendicular to the anti-spark area of the fireproof curtain is the top of the trapezoidal fireproof curtain), and the other end of the fixing member 4 is fixedly connected to the top of the fireproof buffer member 5 to realize the rotational connection between the fireproof buffer member 5 and the fireproof curtain;

[0097] The fixing member 4 can be a metal wire, a metal rope or a non-metallic high-temperature resistant rope.

[0098] Comparative Example 1

[0099] The difference between the new fireproof curtain described in Comparative Example 1 and the new fireproof curtain described in Example 3 is that: the fireproof curtain body 2 described in Comparative Example 1 does not contain an inner layer, and the rest of the structure is the same as that of the new fireproof curtain described in Example 3.

[0100] Comparative Example 2

[0101] The fireproof curtain described in Comparative Example 2 is a commercially available fireproof curtain. The commercially available fireproof curtain is: a 6 mm thick silicone rubber-coated fiberglass fabric fireproof curtain.

[0102] Performance study of the new fireproof curtain described in this application:

[0103] Select a grinding machine with a rotation speed of 2850 r / min, a rated voltage of 380 V, an input power of 1100 W, and a grinding wheel with an assembly diameter of 250 mm. Use this grinding machine to generate high-speed sputtering high-temperature sparks with the grinding material. Hang the new fireproof curtain near the grinding machine through the fixing holes 1 to block the grinding sparks, detect the performance of the fireproof curtain, and use a temperature measuring instrument to measure the temperature of the sample surface in contact with the sparks.

[0104] Table 1 Performance study of the new fireproof curtain

[0105]

[0106]

[0107] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the method of the present invention, several improvements and supplements can be made, and these improvements and supplements should also be regarded as the protection scope of the present invention.

Claims

1. A new type of fire curtain, characterized in that, It includes a fireproof curtain body, and the fireproof curtain body is composed of an inner layer, a middle layer, and an outer layer that are sequentially overlapped; The inner layer is composed of at least one layer of a polyether ether ketone layer, a polyphenylene sulfide layer, a polytetrafluoroethylene layer, or a PFA layer; The middle layer is composed of at least one layer of a heat-resistant metal plate layer, a composite metal plate layer with an organic resin coating thickness of 25 - 35 μm, a carbon fiber layer, a graphite layer, a high-temperature resistant fiber fabric layer, or a high-temperature resistant coated fabric layer; The outer layer is composed of at least one layer of a silicone rubber coated fabric layer, a high-temperature resistant composite fabric layer; The heat-resistant metal plate layer is made of a heat-resistant metal plate with a Ni content ≥ 3.5%; the high-temperature resistant fiber fabric layer is made of a high-temperature resistant fiber fabric with an SiO2 content ≥ 42%; the coating layer of the high-temperature resistant coated fabric layer has a heat-resistant temperature ≥ 250 °C; the silicone rubber coated fabric layer is a fabric coated with silicone rubber with an SiO2 content ≥ 42%; the high-temperature resistant composite fabric layer is a high-temperature resistant composite single-zero aluminum foil or a PTFE fabric layer; A number of parallel fireproof buffer members are rotatably connected to the fireproof curtain body, and the fireproof buffer members are arranged in the anti-spark area of the fireproof curtain body; the plane where a number of parallel fireproof buffer members are located is parallel to the anti-spark surface of the fireproof curtain body; The distance between two adjacent fireproof buffer members in the same row ≤ 120 mm, the thickness of the inner layer of the fireproof curtain body is 0.2 - 3 mm, the thickness of the middle layer of the fireproof curtain body is 0.02 - 3 mm, and the thickness of the outer layer of the fireproof curtain body is 0.2 - 3 mm.

2. The novel fireproof curtain according to claim 1, characterized in that, The distance between two adjacent fireproof buffer members in the same row is 2 - 120 mm.

3. A novel fireproof curtain according to claim 1, characterized in that, The inner layer, the middle layer, and the outer layer are fixedly connected by bolts, nuts, eyelets, or rivets.

4. A novel fireproof curtain according to claim 1, characterized in that, The middle layer and the outer layer are fixedly connected by sewing, and a metal mesh is wrapped around the outer edges of the middle layer and the outer layer.

5. The novel fireproof curtain according to claim 1, characterized in that, The shape of the fireproof curtain body is flat; The top of the fireproof buffer member is connected to the top of the fireproof curtain body by a first support rod. One end of the first support rod is perpendicularly fixed to the top of the fireproof curtain body, and the other end of the first support rod is rotatably connected to the top of the fireproof buffer member; The first support rod and the fireproof buffer member are connected by a fixing member. The fixing member sequentially passes through the fireproof buffer member and the first support rod to realize the connection between the first support rod and the fireproof buffer member.

6. The novel fireproof curtain according to claim 5, characterized in that, The bottom of the fireproof buffer member is connected to the bottom of the fireproof curtain body by a second support rod. One end of the second support rod is perpendicularly fixed to the bottom of the fireproof curtain body, and the other end of the second support rod is rotatably connected to the bottom of the fireproof buffer member; The second support rod and the fireproof buffer member are connected by a fixing member. The fixing member sequentially passes through the fireproof buffer member and the second support rod to realize the connection between the second support rod and the fireproof buffer member.

7. The novel fireproof curtain according to claim 1, characterized in that, The shape of the fireproof curtain body is stepped; The top of the fireproof buffer is suspended and connected to the top of the fireproof curtain body through a fixing member. One end of the fixing member is fixedly connected to the top of the fireproof curtain body, and the other end of the fixing member is fixedly connected to the top of the fireproof buffer, realizing the rotational connection between the fireproof buffer and the fireproof curtain.

8. The novel fireproof curtain according to claim 6, characterized in that, Both the first support rod and the second support rod are made of metal, and the fixing member is a metal wire, a metal rope or a non-metallic high-temperature resistant rope.

9. The novel fireproof curtain according to claim 8, characterized in that, Both the first support rod and the second support rod are made of 304 stainless steel metal, and the fixing member is a metal wire.

10. The novel fireproof curtain according to claim 1, characterized in that, The fireproof buffer is composed of at least one of a polyether ether ketone plate, a polytetrafluoroethylene plate, a composite metal plate with an organic resin coating thickness of 25 - 35 μm, a polyphenylene sulfide plate, a PFA plate, a carbon fiber plate, a graphite plate, a silicone rubber coated fabric layer, a high-temperature resistant fiber fabric plate or a high-temperature resistant coated fabric plate; The shape of the fireproof buffer is rectangular; or the shape of the fireproof buffer is cylindrical, and a rectangular flow dividing piece is vertically arranged on the cylindrical fireproof buffer, and the rectangular flow dividing pieces are uniformly arranged around the cylindrical fireproof buffer.

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