A fire expansion device

Abstract

The present invention discloses a fire expansion device, comprising a flexible fireproof element installed on the outside of a pipe connector, wherein the flexible fireproof element comprises a coating layer, a flame retardant layer and an expansion layer in sequence from the outside to the inside, wherein the lengths of the coating layer, the flame retardant layer and the expansion layer perpendicular to the axis of the flexible fireproof element decrease in sequence, so that the expansion layer expands radially outward when heated by fire. When a fire occurs, the device can isolate open flames and heat in stages, thereby protecting the pipe fittings inside from damage.

Description

Technical Field

[0001] The invention relates to the field of pipeline connection equipment, and in particular to a fire expansion device. Background Art

[0002] At present, pipelines are widely used as devices for conveying gas, liquid or fluid with solid particles, such as water pipelines, gas pipelines, sewage pipelines, etc. When installing pipelines, due to the limited length of a single pipeline, it is sometimes necessary to connect multiple pipelines. In order to facilitate the connection of pipelines, people invented pipeline connectors.

[0003] Pipe connectors are used to connect two pipes to achieve the function of sealing and pressure bearing, so that the pipes are connected. Pipe connectors are widely used to connect pipes of different materials in industries such as petroleum, chemical industry, shipbuilding, offshore platforms, electric power, light industry, municipal administration and mechanical equipment.

[0004] However, conventional pipe connectors currently in use do not have fireproof properties and cannot be used in situations where fireproofing is required. Even if they are used, once a fire occurs, the high temperature generated by the combustion will cause the sealing material in the pipe connector to carbonize and fall off, making it impossible to seal. The medium transported in the pipeline will leak, causing greater safety accidents and economic losses.

[0005] Therefore, there is an urgent need in the art to develop a new fire expansion device with a simple structure, which is coated on the outside of the pipe connector to protect the pipe connector and prevent it from aging or falling off when exposed to fire. Summary of the invention

[0006] In order to solve the above-mentioned technical problems existing in the prior art, the present invention provides a fire expansion device, which is used for the outer surface of the current pipe connector, and includes a metal layer, a flame-retardant cloth layer and an expansion layer. When a fire occurs, it can isolate the open flame and the temperature step by step, thereby protecting the pipes inside from damage.

[0007] In order to achieve the above object, the specific technical solution provided by the present invention is as follows:

[0008] A fire expansion device comprises a flexible fireproof element installed on the outside of a pipe connector, wherein the flexible fireproof element comprises a coating layer, a flame retardant layer and an expansion layer from the outside to the inside, and the lengths of the coating layer, the flame retardant layer and the expansion layer perpendicular to the axis of the flexible fireproof element decrease successively, so that the expansion layer expands radially outward when heated by fire.

[0009] Preferably, the coating layer is detachably connected to the pipe connector via a connecting and fastening device.

[0010] Preferably, the covering layer comprises a flexible metal shell, the flame retardant layer comprises a flame retardant cloth closely attached to the covering layer, and the expansion layer comprises an expansion module.

[0011] Preferably, in the flexible metal shell, the fixing portion and the ear portion are integrally formed, and the bent portion is provided with serrations for protecting both ends of the pipe connector along the axial direction; the fixing portion includes a first through hole and a second through hole for fixing; the bent portion is provided with a third through hole, and the first through hole is connected to the third through hole.

[0012] Preferably, a bolt is provided in the second through hole, and the ear is fixed to the pipe connector by the bolt.

[0013] Preferably, fixing nuts are provided in the first through hole and the third through hole, and the connecting and fastening device includes a fastening screw, a fixing nut and a pressure plate.

[0014] Preferably, the intumescent modules are made of a fire resistant intumescent material.

[0015] Preferably, the expansion module extends in a direction perpendicular to the axis of the flexible fire protection element.

[0016] Preferably, the number of the expansion modules is not less than 1, and a gap is provided between two adjacent expansion modules.

[0017] Preferably, the number of the flame-retardant cloth is no less than one layer.

[0018] In view of the drawback that conventional pipe connectors in the prior art cannot achieve fire protection function, the beneficial effects of the present invention are:

[0019] 1. Three layers of detachable flexible fireproof elements are installed outside the conventional pipe connector, with progressive flame protection and thermal insulation, which can effectively prevent external flames from damaging the pipe fittings.

[0020] 2. The device described in the present application produces less smoke and dust after being burned by fire, thus avoiding secondary injuries to firefighters when fighting fires.

[0021] 3. The flexible metal shell in the flexible fire protection element is a split design with a light structure and easy installation.

[0022] 4. The special-shaped design at both ends of the axial direction of the flexible metal shell can effectively prevent open flames from invading from the side of the pipeline, eliminating potential hidden dangers.

[0023] 5. The expansion module in the flexible fireproof element expands as a whole after encountering high temperature, and expands to cover the pipe fittings and pipe connectors, thereby providing insulation and preventing damage to the pipe joints. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a front view of a preferred embodiment of the technical solution of the present invention;

[0025] Figure 2 It is a cross-sectional view of a front view of a preferred embodiment of the technical solution of the present invention;

[0026] Figure 3 It is a top view of a preferred embodiment of the technical solution of the present invention;

[0027] Figure 4 It is a right view of a preferred embodiment of the technical solution of the present invention;

[0028] Figure 5 It is a stereogram of a preferred embodiment of the technical solution of the present invention;

[0029] Figure 6 It is an expanded view of the ear part and the fixing part in a preferred embodiment of the technical solution of the present invention;

[0030] Figure 7 It is an expanded view of a bending portion in a preferred embodiment of the technical solution of the present invention;

[0031] Figure 8 It is a stereogram of another preferred embodiment of the technical solution of the present invention;

[0032] Fig. 9 It is an expanded view of the coating layer in another preferred embodiment of the technical solution of the present invention;

[0033] Among them: 10-coating layer, 11-ear, 12-fixing part, 13-bending part, 14-serration, 15-first through hole, 16-second through hole, 17-third through hole; 20-flame retardant layer; 30-expansion layer; 40-connecting and fastening device, 41-connecting stud, 42-locking nut, 43-flat washer, 44-fastening screw, 45-pressing plate, 46-fixing nut; 50-pipe connector, 51-locking component; 60-bolt. DETAILED DESCRIPTION

[0034] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. As mentioned throughout the specification and claims, "including" is an open term, so it should be interpreted as "including but not limited to". The subsequent description of the specification is a preferred embodiment of implementing the present application, but the description is for the purpose of illustrating the general principles of the present application, and is not used to limit the scope of the present application. The scope of protection of the present application shall be determined by the definition of the attached claims.

[0035] Reference Figure 1-Figure 7 ,the present invention discloses a fire-expanding device, which includes a flexible fireproof element installed outside a pipe connector 50. The flexible fireproof element sequentially includes a cladding layer 10, a flame-retardant layer 20 and an expansion layer 30 from outside to inside. The lengths of the cladding layer 10, the flame-retardant layer 20 and the expansion layer 30 in the direction perpendicular to the axis of the flexible fireproof element decrease in sequence, so that the expansion layer expands radially outwards when exposed to fire and heated. Further, the cladding layer 10 includes a flexible metal shell, preferably made of stainless steel material, and can also be other metal materials such as aluminum, copper, iron, etc., to effectively prevent external open fire from invading. The flame-retardant layer 20 includes a flame-retardant cloth closely attached to the cladding layer, and the expansion layer 30 includes an expansion module.

[0036] Further, the cladding layer 10 is detachably connected to the pipe connector 50 through a connection fastening device 40.

[0037] Since both the cladding layer and the pipe connector are made of metal materials, and metal materials have the property of thermal expansion and contraction, there is a certain gap between the flexible fireproof element and the pipe connector to ensure that both have a certain deformation space when the temperature changes. When the pipe encounters fire, an expansion module is provided for heat insulation. When filling the gap between the flexible fireproof element and the pipe connector, since the lengths of the cladding layer 10, the flame-retardant layer 20 and the expansion layer 30 in the direction perpendicular to the axis decrease in sequence, the expansion layer expands radially outwards when exposed to fire and heated to protect the pipe fittings and isolate high temperature.

[0038] Further, the expansion module is made of a fireproof expansion material and expands as a whole when encountering high temperature, expanding to cover the pipe fittings and the connector, so as to further insulate heat. Preferably, the expansion module is in the shape of a rectangular sheet and extends in the direction perpendicular to the axis of the flexible fireproof element, or is in the shape of a "匚" shape, so that when the side is heated, the expansion module can cover and insulate heat more quickly and comprehensively. In a preferred embodiment, the number of the expansion modules is not less than 1, and there is a gap between two adjacent expansion modules to ensure that the expansion modules will not damage the pipe fittings while expanding and protecting the pipe fittings when heated.

[0039] Further, the number of the flame-retardant cloths is not less than 1 layer. Specifically, it can be set to multiple layers according to the fire protection level to play the role of preventing residual open fire and heat insulation.

[0040] In a preferred embodiment, the ear portion 11 and the fixing portion 12 are integrally formed, and are connected and fixed to the curved portion 13 through a connecting and fastening device 40. The curved portion 13 is provided with serrations 14 for protecting the two ends of the pipe connector along the axial direction. The fixing portion 12 includes a first through hole 15 and a second through hole 16 for fixing. The curved portion is provided with a third through hole 17, and the first through hole 15 and the third through hole 17 are intersecting. The connecting and fastening device 40 includes a fastening screw 44, a pressing plate 45 and a fixing nut 46, and the fixing nut 46 is welded or riveted in the through hole at the connection between the curved portion 13 and the fixing portion 12, that is, the first through hole 15 and the third through hole 17. Specifically, the fastening screw 44 can be selected from a countersunk screw, a semicircular head screw, an inner hexagon screw or an outer hexagon screw, etc., and the fixing nut 46 can be selected from a welding nut (energy storage welding nut, two-point or four-point welding nut), a riveted nut (pressure rivet nut, pull rivet nut), etc.

[0041] Specifically, a bolt 60 is disposed in the second through hole 16 , and the ear portion 11 is fixed to the pipe connector 50 via the bolt 60 .

[0042] In another preferred embodiment, Figure 8 As shown, the flexible metal shell includes an integrally formed ear portion 11, a fixing portion 12 and a bending portion 13; the bending portion 13 is provided with serrations 14 for protecting both ends of the pipe connector along the axial direction; the fixing portion 12 includes a first through hole 15 and a second through hole 16 for fixing; the ear portions 11 are arranged opposite to each other for protecting the locking component 51 on the pipe connector 50.

[0043] Furthermore, a bolt 60 is provided in the second through hole 16 , and the ear portion 11 is fixed to the pipe connector 50 by the bolt 60 .

[0044] Furthermore, the connecting and fastening device 40 includes a connecting stud 41, a lock nut 42 and a flat washer 43, the connecting stud 41 is welded or riveted to the outer shell of the pipe connector 50, the lock nut 42 and the flat washer 43 are installed in the first through hole 15, and the coating layer 10 and the pipe connector 50 are fixed by the connecting stud 41.

[0045] In view of the shortcomings of the prior art, the beneficial effects of the invention are:

[0046] 1. Three layers of detachable flexible fireproof elements are installed outside the conventional pipe connector, with progressive flame protection and thermal insulation, which can effectively prevent external flames from damaging the pipe fittings.

[0047] 2. The device described in the present application produces less smoke and dust after being burned by fire, thus avoiding secondary injuries to firefighters when fighting fires.

[0048] 3. The split design of the flexible metal shell in the flexible fireproof element has a stronger integrity, a light structure and is easy to install.

[0049] 4. The special-shaped design at both ends of the axial direction of the flexible metal shell can effectively prevent open flames from invading from the side of the pipeline, eliminating potential hidden dangers.

[0050] 5. The expansion module in the flexible fireproof element expands as a whole after encountering high temperature, and expands to cover the pipe fittings and pipe connectors, thereby providing insulation and preventing damage to the pipe joints.

[0051] The above description shows and describes several preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

Claims

1. A fire expansion device, comprising a flexible fireproof element mounted on the outside of a pipe connector, characterized in that: The flexible fireproof element comprises a coating layer, a flame retardant layer and an expansion layer from the outside to the inside, and the lengths of the coating layer, the flame retardant layer and the expansion layer perpendicular to the axis of the flexible fireproof element decrease in sequence, so that the expansion layer expands radially outward when heated by fire; The coating layer is detachably connected to the pipe connector via a connecting and fastening device; The coating layer comprises a flexible metal shell, the flame retardant layer comprises a flame retardant cloth closely attached to the coating layer, and the expansion layer comprises an expansion module; In the flexible metal shell, the fixing part and the ear part are integrally formed, and the bending part is provided with serrations for protecting the two ends of the pipe connector along the axial direction; the fixing part includes a first through hole and a second through hole for fixing; the bending part is provided with a third through hole, and the first through hole is connected with the third through hole; A bolt is provided in the second through hole, and the ear is fixed to the pipe connector by the bolt; The first through hole and the third through hole are provided with fixing nuts, and the connecting and fastening device comprises a fastening screw, a fixing nut and a pressing plate; The expansion module is made of fireproof expansion material; The expansion module extends in a direction perpendicular to the axis of the flexible fire protection element; The number of the expansion modules is not less than 1, and a gap is provided between two adjacent expansion modules.

2. The fire expansion device according to claim 1, characterized in that: The number of the flame retardant cloth is not less than 1 layer.

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