CN117462890A - Continuous combustion-resistant flame arrester - Google Patents
Continuous combustion-resistant flame arrester Download PDFInfo
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- CN117462890A CN117462890A CN202210857530.2A CN202210857530A CN117462890A CN 117462890 A CN117462890 A CN 117462890A CN 202210857530 A CN202210857530 A CN 202210857530A CN 117462890 A CN117462890 A CN 117462890A
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- retarding
- combustion
- flame retardant
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 77
- 238000002844 melting Methods 0.000 claims abstract description 12
- 230000008018 melting Effects 0.000 claims abstract description 12
- 238000009413 insulation Methods 0.000 claims abstract description 7
- 238000005192 partition Methods 0.000 claims description 55
- 239000003063 flame retardant Substances 0.000 claims description 51
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical group N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 48
- 230000002459 sustained effect Effects 0.000 claims description 22
- 238000000926 separation method Methods 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 230000009970 fire resistant effect Effects 0.000 description 12
- 230000002708 enhancing effect Effects 0.000 description 11
- 230000000979 retarding effect Effects 0.000 description 11
- 238000012546 transfer Methods 0.000 description 11
- 238000004880 explosion Methods 0.000 description 7
- 241000209094 Oryza Species 0.000 description 5
- 235000007164 Oryza sativa Nutrition 0.000 description 5
- 230000001965 increasing effect Effects 0.000 description 5
- 235000009566 rice Nutrition 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000013021 overheating Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 230000000241 respiratory effect Effects 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Thermal Insulation (AREA)
Abstract
The invention provides a flame arrester resistant to continuous combustion, which comprises: the upper end and the lower end of the valve body are respectively formed into an outlet end and an inlet end; a fire-retarding and burn-resistant unit arranged at the outlet end; a rain cover arranged above the fire-retarding and fire-resisting unit, wherein a combustion space is formed between the rain cover and the fire-retarding and fire-resisting unit, and a gas discharge channel is formed at the circumferential edges of the fire-retarding and fire-resisting unit and the rain cover; the rain cover is configured to automatically pop open when the combustion space continuously burns and reaches a preset melting point, and the fire-retarding and burning-resisting unit is configured to enable heat generated by combustion in the combustion space to be transferred outwards in a radial direction and form axial heat insulation, so that heat generated by combustion in the combustion space is prevented from being transferred to the inner cavity of the valve body.
Description
Technical Field
The invention belongs to the technical field of fire-retarding explosion suppression, and particularly relates to a continuous combustion-resistant flame arrester.
Background
The fire arrestor is an effective safety protection measure for preventing and relieving the occurrence and expansion of fire and explosion accidents, is one of important safety measures for petrochemical enterprises, and has wide application. Flame arresters are typically mounted on ports or gas lines of the device through which a medium can circulate but which are capable of extinguishing a flame so that the contents are capable of preventing the spread of flames and explosions. The flame arrestor has wide application in tank field gas phase communication systems, VOCs treatment facilities, incinerator systems, torch systems, emptying systems and the like of petroleum and petrochemical enterprises.
Flame arresters need to prevent flames from propagating to the protection side, and most of current flame arresters can prevent deflagration or detonation flames from propagating. However, when the combustible gas continues to flow to the unprotected side, a sustained combustion will occur at the flame arrestor. At this time, the flame continuously heats the flame arrestor, so that the temperature of the flame arrestor is increased, and a backfire accident occurs. For this reason, for the scene that there may be continuous discharge of the combustible gas, a flame arrester of a long-time burn-resistant type needs to be installed. For storage tanks of class 1 and below, the breather valve should be provided with a flame arrester of the long-time burn-resistant type, as specified by the standards of API2000 and ISO 28300. However, most of the existing flame arresters at present cannot realize long-time combustion resistance, and when a continuous combustible gas source exists, tempering flash explosion accidents can occur.
Therefore, there is a need for a flame arrestor that is simple in construction and reliable in performance and is resistant to burning for a long period of time.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide a continuous combustion-resistant flame arrester which can realize radial heat transfer of a combustion flame retardant disk, enables the center temperature of the combustion side flame retardant disk to spread outwards, can form axial heat insulation and prevents heat generated by combustion in a combustion space from being transferred to the inner cavity of a valve body.
To this end, according to the invention there is provided a flame arrester of the sustained combustion type comprising: the upper end and the lower end of the valve body are respectively formed into an outlet end and an inlet end; a fire-retarding and burn-resistant unit arranged at the outlet end; a rain cover arranged above the fire-retarding and fire-resisting unit, wherein a combustion space is formed between the rain cover and the fire-retarding and fire-resisting unit, and a gas discharge channel is formed at the circumferential edges of the fire-retarding and fire-resisting unit and the rain cover; the rain cover is configured to automatically pop open when the combustion space is continuously combusted and reaches a preset melting point, and the fire-retarding and combustion-resisting unit is configured to enable heat generated by combustion in the combustion space to be transferred outwards in a radial direction and form axial heat insulation, so that heat generated by combustion in the combustion space is prevented from being transferred to the inner cavity of the valve body.
In one embodiment, the valve body is configured to include a straight pipe section and an expanded diameter section connected to an upper end of the straight pipe section, the expanded diameter section having a diameter increasing from an inlet end to an outlet end, and a ratio of a lower end section diameter to an upper end section diameter of the expanded diameter section being 1:1.1 to 1: 3.
In one embodiment, the fire-retarding and burning-resisting unit is fixedly arranged at the outlet end of the valve body through a supporting plate, and a pressing plate is arranged at the upper end of the fire-retarding and burning-resisting unit.
In one embodiment, the support plate and the pressure plate are each configured to include an outer annular body and a hollowed-out body formed inside the outer annular body.
In one embodiment, a fixed plate is arranged on the outer side of the valve body, the middle part of the rain shield is fixedly connected with the pressing plate through a fusible bolt, the circumferential edge of the rain shield is configured to be turned downwards and connected with the fixed plate through an elastic resetting piece,
the fusible plug fuses when reaching a preset melting point, so that the rain cover can be sprung to the side surface of the valve body under the action of the elastic resetting piece.
In one embodiment, the fusible plug has a melting point of 100-300 ℃.
In one embodiment, the firestop and burn resistant unit includes at least 2 firestop elements and a separation element disposed between adjacent ones of the firestop elements.
In one embodiment, the distance h between adjacent ones of said fire retarding elements 1 Is set to 0.0-5mm.
In one embodiment, the divider member is configured to include a plurality of interconnected divider links,
a plurality of the partition links are arranged to be evenly spaced apart in the circumferential direction and extend radially outward from the center, or a plurality of the partition links are arranged to be mutually cross-distributed to form a net shape.
In one embodiment, the circumferential edge of the separating element is provided with an annular frame, the inner side of which is fixedly connected to the free end of each separating link.
In one embodiment, the upper ends of the partition elements are in surface-to-surface contact or line-to-surface contact with the respective firestop elements, and the lower ends of the partition elements are in line-to-surface contact with the respective firestop elements.
In one embodiment, the firestop element is configured in a cylindrical shape having a plurality of slits, the thickness of the firestop element being 8-50mm.
In one embodiment, the slits are formed by alternately winding a straight steel belt and a corrugated steel belt, and the height h of the slits is 2 0.4-1.2mm.
Compared with the prior art, the application has the advantages that:
according to the continuous combustion-resistant flame arrester disclosed by the invention, the axial heat insulation between the flame arresting disks can be realized, the heat is prevented from spreading to the protection side along the flame arresting disks, meanwhile, the radial heat transfer of the flame arresting disks can be realized, the central temperature of the flame arresting disks at the combustion side is spread outwards, the temperature of the flame arresting disks is uniform, and the central overheating is prevented, so that the long-time burning resistance of the continuous combustion-resistant flame arrester is obviously enhanced. The rain-proof cap can automatically spring to the side position of the valve body when the combustion space continuously burns and reaches a preset melting point, so that the upper side of the fire-retarding and burning-resisting unit is completely led to the atmosphere, flame is prevented from burning at the fire-retarding and burning-resisting unit, heat dissipation to the atmosphere is increased, and the long-time burning resistance of the continuous combustion type flame arrester is further enhanced.
Drawings
The present invention will be described below with reference to the accompanying drawings.
Fig. 1 schematically shows the structure of a flame arrester of the sustained combustion type according to the present invention.
Fig. 2 schematically illustrates the state in which the rain cap in the flame arrester of fig. 1 is sprung open.
Fig. 3a and 3b schematically show the structure of the press plate of different embodiments.
Fig. 4a and 4b schematically show the construction of a fire-retarding and burn-resistant unit of different embodiments.
Fig. 5 is an enlarged view of area a of fig. 4 a.
Fig. 6 and 7 schematically show the structure of the separation element of different embodiments in a firestop and burn resistant unit.
Fig. 8a to 8c schematically show the cross-sectional shape of the partition link in the partition element.
Fig. 9 schematically shows the structure of the fire-retarding element in the fire-retarding and fire-resisting unit.
Fig. 10 is an enlarged view of region B in fig. 9.
Wherein, the reference numerals in the drawings are respectively as follows:
1-a valve body;
a 2-connector;
3-gas channels;
4-straight pipe sections;
5-expanding the diameter section;
6-supporting plates;
61-an annular body;
62-hollowed-out body;
7-pressing plates;
8-a rain cap;
9-fixing the nut;
10-positioning a nut;
11-fusible plugs;
12-a gas discharge channel;
13-an elastic restoring member;
14-fixing plates;
15-a fire-retarding and burning-resisting unit;
16-a fire-retarding element;
160-straight steel strips;
160-corrugated steel strip;
17-a separation element;
170-separating links;
171-an annular frame;
100-continuous combustion type flame arrestor.
In this application, all of the figures are schematic drawings which are intended to illustrate the principles of the invention and are not to scale.
Detailed Description
The invention is described below with reference to the accompanying drawings. It should be noted that these descriptions are provided only for the purpose of illustrating the principles of the present invention and are not intended to limit the scope of the present invention.
In this application, it should be noted that the directional terms or qualifiers "upper", "lower", etc. used in this application are used for the purpose of describing the present invention and simplifying the description only, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.
Fig. 1 schematically shows the structure of a flame arrester 100 of the sustained combustion type according to the present invention. As shown in fig. 1, the sustained combustion flame arrester 100 includes a valve body 1, a flame-retardant and fire-resistant unit 15, and a rain cap 8. The upper and lower ends of the valve body 1 are respectively formed as an outlet end and an inlet end. The inlet end is formed as a gas channel 3. A fire-retarding and burn-resistant unit 15 is arranged at the outlet end of the valve body 1. The rain cap 8 is arranged above the fire-retarding and fire-resisting unit 15, a combustion space is formed between the rain cap 8 and the fire-retarding and fire-resisting unit 15, a gas discharge channel 12 is formed at the circumferential edges of the fire-retarding and fire-resisting unit 15 and the rain cap 8, and the combustion space is communicated with the outside atmosphere through the gas discharge channel 12. The rain cap 8 is configured to automatically pop open when the combustion space continues to burn and reaches a predetermined melting point. Fig. 2 schematically shows the pop-up state of the rain cap 8. The firestop and burn-resistant unit 15 is configured to be able to transfer heat radially outwardly and to form an axial insulation against heat generated by combustion in the combustion space being transferred to the inner cavity of the valve body 1.
According to the present invention, as shown in fig. 1, the valve body 1 is constructed to include a straight pipe section 4 and an expanded diameter section 5 connected to the upper end of the straight pipe section 4. The diameter of the expanded section 5 is arranged to increase from the inlet end to the outlet end. The ratio of the lower end section diameter to the upper end section diameter of the expanded section 5 is 1:1.1 to 1: 3. Preferably, the straight tube section 4 and the enlarged diameter section 5 are constructed in one piece.
In this embodiment, the lower end of the straight pipe section 4 is provided with a connector 2. Preferably, the connection 2 is configured as a connection flange for connecting the continuous combustion flame arrester 100 with a flammable gas discharge pipe end, a device or valve outlet, a breather valve outlet, or the like.
As shown in fig. 1, a fire-retarding and fire-resisting unit 15 is fixedly installed at the outlet end of the valve body 1 through a supporting plate 6, and a pressing plate 7 is provided at the upper end of the fire-retarding and fire-resisting unit 15. The supporting plate 6 and the pressing plate 7 form fixed installation on the fire-retarding and burning-resisting unit 15 together, and the installation stability of the fire-retarding and burning-resisting unit 15 can be ensured.
In one embodiment, the platen 7 and the support plate 6 may be of the same structure. The support plate 6 and the pressing plate 7 are each configured to include an outer annular body 61 and a hollowed-out body 62 formed inside the outer annular body 61.
As shown in fig. 3a, the hollow body 62 may be a linear link.
As shown in fig. 3b, the hollowed-out body 62' may be a cross-shaped link.
Of course, the hollow body can also be constructed as a structure formed by crossing other connecting rods like a Chinese character 'mi'.
In a preferred embodiment, a plurality of circular holes (not shown) are formed on the corresponding outer annular body 61 of the support plate 6 and the pressing plate 7, wherein the circular holes on the support plate 6 and the pressing plate 7 can be in one-to-one correspondence, and corresponding mounting bolts can fix the support plate 6 and the pressing plate 7 into a whole.
According to the present invention, as shown in fig. 1 and 2, a fixing plate 14 is provided at the outside of the valve body 1. Preferably, the fixing plate 14 is provided on the circumferential outer side of the expanded diameter section 5 near the outlet end, and is fixed on the outer wall surface of the expanded diameter section 5. The middle part of the rain cap 8 is fixedly connected with the center of the pressing plate 7 through a fusible plug 11. The circumferential edge of the rain cap 8 is configured to fold down and form a connection with the fixing plate 14 by means of the elastic return element 13. In one embodiment, the resilient return member 13 is a torsion spring. The fusible plug 11 fuses when reaching a predetermined melting point, and the torsion spring can spring the rain cap 8 to the side position of the valve body 1.
As shown in fig. 1, one end of the fusible plug 11 is fixedly connected with the middle position of the rain cap 8 through the fixing nut 9 and the positioning nut 10, and the other end of the fusible plug 11 is fixedly connected with the center position of the pressing plate 7. Thereby, the rain cap 8 is arranged right above the firestop and burn-resistant unit 15, and a distance is maintained between the rain cap 8 and the firestop and burn-resistant unit 15 to form a combustion space between the rain cap 8 and the firestop and burn-resistant unit 15, and to ensure that the gas discharge passage 12 is formed at the circumferential edges of the firestop and burn-resistant unit 15 and the rain cap 8.
According to the invention, the fusible plug 11 is made of fusible metal or fusible nonmetal, and the melting point of the fusible plug 11 is 100-300 ℃, preferably 180-220 ℃. When continuous combustion occurs in the combustion space on the upper side of the fire-retarding and combustion-resisting unit 15, the fusible plug 11 is heated and fused, and the torsion spring 13 automatically ejects the rain cap 8 to the side surface position of the valve body 1, so that the upper side of the fire-retarding and combustion-resisting unit 15 is completely opened to the atmosphere, flame is prevented from being burnt at the fire-retarding and combustion-resisting unit 15, and meanwhile heat dissipation to the atmosphere is increased, so that the long-time combustion resistance of the continuous combustion type flame arrester 100 is greatly improved.
According to the present invention, the firestop and burn resistant unit 15 comprises at least 2 firestop elements 16 and a separation element 17 arranged between adjacent firestop elements 16. The distance h1 (see fig. 5) between two adjacent fire-retarding elements 16 is set to 0.0-5mm. Preferably set to 0.2-2mm.
As shown in fig. 4a, the firestop and burn resistant unit 15 may be provided to include 2 firestop elements 16, with a partition element 17 provided between the 2 firestop elements 16.
As shown in fig. 4b, the firestop and burn resistant unit 15' may be provided to include 3 firestop elements 16, with a partition element 17 provided between adjacent 2 firestop elements 16.
Of course, the firestop fire-resistant unit may also be provided to include more firestop elements 16.
According to the present invention, the partition element 17 is configured to include a plurality of interconnected partition links 170. The plurality of partition links 170 are preferably arranged in a staggered arrangement. And, the upper end of the partition member 17 is closely attached to the corresponding fire-retarding member 16, and surface-to-surface contact or line-to-surface contact is formed therebetween, while the lower end of the partition member 17 is in line-to-surface contact with the corresponding fire-retarding member 16.
In one embodiment, as shown in fig. 6a and 6b, a plurality of separator links 170 may be provided evenly spaced circumferentially and extending radially outwardly from the center. For example, the partition member 17 is formed in a cross-shaped, a rice-shaped, or the like structure.
In another embodiment, as shown in fig. 6c and 6d, a plurality of partition links 170 may be arranged to cross each other to form a net shape. Preferably, the plurality of divider links 170 are arranged at 90 degree intersections, although other angular intersections are possible.
According to the invention, as shown in fig. 7a to 7d, a ring-shaped frame 171 can also be provided at the circumferential edge of the separating element 17, the inner side of the ring-shaped frame 171 being fixedly connected to the free end of each separating link 170.
According to the present invention, as shown in fig. 8a to 8c, the sectional shape of the partition link 170 (170', 170 ") may be set to a triangle with a plane upper surface, a circular arc with a plane upper surface, or a circle. Meanwhile, the ring frame 171 may have a sectional shape similar to that of the partition link 170, and may be provided in a triangular shape having a plane upper surface, a circular arc shape having a plane upper surface, or a circular shape. Thereby, the upper ends of the partition members 17 are brought into surface-to-surface contact or line-to-surface contact with the corresponding firestop members 16, and the lower ends of the partition members 17 are brought into line-to-surface contact with the corresponding firestop members 16, which can reduce the contact area of the partition members 17 with the underlying firestop members 15, thereby significantly reducing the transfer of combustion-side heat to the non-combustion-side firestop members.
Preferably, as shown in fig. 8a and 8b, the sectional shapes of the partition link 170 and the ring frame 171 are configured as a triangle whose upper part is planar or a circular arc whose upper part is planar, so that the upper end surfaces of the partition members 17 are brought into surface-to-surface contact with the corresponding firestop members 16. In this way, on the one hand, the separating element 17 can be fully contacted with the corresponding upper fire-retarding element 16 through surface contact, so that the radial heat transfer of the upper fire-retarding element is enhanced, the radial heat conduction is enhanced, and the temperature of the fire-retarding element is uniformly distributed, so that local overheating is avoided. The heat generated by combustion in the combustion space can be uniformly conducted along the radial direction of the fire-retarding and combustion-resisting unit 15, which is very beneficial to radial heat dissipation. On the other hand, by the line-surface contact, the contact area of the partition member 17 and the lower corresponding flame retardant member 16 is reduced, and the heat conduction from the upper side (combustion side) flame retardant member to the lower side (protection side) flame retardant member is reduced, which is very advantageous for enhancing the long-time burning resistance of the continuous combustion type flame retardant 100.
According to the present invention, as shown in fig. 9, the firestop element 16 is configured in a cylindrical shape having a plurality of slits. The thickness of individual firestop element 16 is 8-50mm. In one embodiment, as shown in fig. 10, the slits may be triangular slits formed by alternately winding a straight steel strip 160 and a corrugated steel strip 161. And the height h of the triangular slit 2 0.4-1.2mm. For example, for a IIA explosion rated firestop breather valve, the height of the triangular slit, h 2 0.4-1.2mm. For IIB3 explosion class fire-blocking breather valve, the height h of the triangular slit 2 Is 0.3-0.9mm. For IIC explosion class fire-resistant breather valve, the height h of the triangular slit 2 0.1mm to 0.4mm.
The flame arrestor 100 of the sustained combustion type according to the present invention is described below in a specific embodiment.
Example 1:
the firestop and burn resistant unit 15 comprises 2 firestop elements 16, with a separation element 17 between each firestop element 16. Distance h between fire-retarding elements 16 1 Is 0.5mm. The partition member 17 has a rice shape, the partition link 170 has a triangular cross-sectional shape, and the upper side of the partition link 170 is a plane. The circumferential edge of the partition link 170 is fixedly connected with an annular frame171, the cross-sectional shape of the ring frame 171 is triangular. Thereby, the upper section of the partition element 17 is formed to be planar and to be in close contact with the corresponding upper side fire retarding element 16, enhancing the radial heat transfer of the upper side fire retarding element, enabling the temperature of the fire retarding element to be evenly distributed, avoiding local high temperatures. The lower end of the partition member 17 is in line-surface contact with the lower side flame retardant member 16, reducing the contact area with the lower side flame retardant member, thereby reducing the heat conduction from the upper side (combustion side) flame retardant member to the lower side (protection side) flame retardant member, and significantly enhancing the long-time flame resistance of the sustained combustion type flame retardant 100.
In this embodiment, the fire-resistant sustained fire arrestor 100 is designed to have a fire-resistant rating IIA, the triangular slit formed by the fire-resistant element 16 has a height h 2 Is 0.8mm and the thickness of the individual fire-retarding elements 16 is 15mm.
Example 2:
the firestop and burn-resistant unit 15 comprises 3 firestop elements 16, with a separation element 17 between each firestop element 16. Distance h between fire-retarding elements 16 1 Is 0.5mm. The partition member 17 has a rice shape, the partition link 170 has a triangular cross-sectional shape, and the upper side of the partition link 170 is a plane. The circumferential edge of the partition link 170 is fixedly connected with an annular frame 171, and the annular frame 171 has a triangular cross-sectional shape. Thereby, the upper section of the partition element 17 is formed to be planar and to be in close contact with the corresponding upper side fire retarding element 16, enhancing the radial heat transfer of the upper side fire retarding element, enabling the temperature of the fire retarding element to be evenly distributed, avoiding local high temperatures. The lower end of the partition member 17 is in line-surface contact with the lower side flame retardant member 16, reducing the contact area with the lower side flame retardant member, thereby reducing the heat conduction from the upper side (combustion side) flame retardant member to the lower side (protection side) flame retardant member, and significantly enhancing the long-time flame resistance of the sustained combustion type flame retardant 100.
In this embodiment, the fire-resistant sustained fire arrestor 100 is designed to have a fire-resistant rating IIA, the triangular slit formed by the fire-resistant element 16 has a height h 2 Is 0.8mm and the thickness of the individual fire-retarding elements 16 is 10mm.
Example 3:
the firestop and burn resistant unit 15 comprises 2 firestop elements 16, with a separation element 17 between each firestop element 16. The distance h1 between the fire-retarding elements 16 is 0.3mm. The partition member 17 has a rice shape, the partition link 170 has a triangular cross-sectional shape, and the upper side of the partition link 170 is a plane. The circumferential edge of the partition link 170 is fixedly connected with an annular frame 171, and the annular frame 171 has a triangular cross-sectional shape. Thereby, the upper section of the partition element 17 is formed to be planar and to be in close contact with the corresponding upper side fire retarding element 16, enhancing the radial heat transfer of the upper side fire retarding element, enabling the temperature of the fire retarding element to be evenly distributed, avoiding local high temperatures. The lower end of the partition member 17 is in line-surface contact with the lower side flame retardant member 16, reducing the contact area with the lower side flame retardant member, thereby reducing the heat conduction from the upper side (combustion side) flame retardant member to the lower side (protection side) flame retardant member, and significantly enhancing the long-time flame resistance of the sustained combustion type flame retardant 100.
In this embodiment, the fire-resistant sustained fire arrestor 100 is designed to have a fire-resistant rating of IIB3, the triangular slit formed by the fire-resistant element 16 has a height h 2 Is 0.5mm and the thickness of the individual fire-retarding elements 16 is 15mm.
Example 4:
the firestop and burn resistant unit 15 comprises 2 firestop elements 16, with a separation element 17 between each firestop element 16. Distance h between fire-retarding elements 16 1 Is 0.5mm. The partition member 17 has a rice shape, the partition link 170 has a triangular cross-sectional shape, and the upper side of the partition link 170 is a plane. The circumferential edge of the partition link 170 is fixedly connected with an annular frame 171, and the annular frame 171 has a circular arc-shaped cross-section. Thus, the upper ends of the partition link 170 and the annular frame 171 are made planar and closely contact the corresponding upper firestop element 16, enhancing radial heat transfer from the upper firestop element, allowing uniform temperature distribution of the firestop element, and avoiding localized high temperatures. The lower end of the partition member 17 is in line-surface contact with the lower side flame retardant member 16, reducing the contact area with the lower side flame retardant member, thereby reducing the heat conduction from the upper side (combustion side) flame retardant member to the lower side (protection side) flame retardant member, and significantly enhancing the long-time flame resistance of the sustained combustion type flame retardant 100.
In the present embodiment, the flame retardant design of the flame retardant device 100 is a flame retardant designGrade IIA, height h of triangular slit formed by fire retarding element 16 2 Is 0.8mm and the thickness of the individual fire-retarding elements 16 is 15mm.
Example 5:
the firestop and burn-resistant unit 15 comprises 3 firestop elements 16, with a separation element 17 between each firestop element 16. Distance h between fire-retarding elements 16 1 Is 0.2mm. The partition member 17 has a rice shape, the partition link 170 has a triangular cross-sectional shape, and the upper side of the partition link 170 is a plane. The circumferential edge of the partition link 170 is fixedly connected with an annular frame 171, and the annular frame 171 has a circular arc-shaped cross-section. Thus, the upper ends of the partition link 170 and the annular frame 171 are made planar and closely contact the corresponding upper firestop element 16, enhancing radial heat transfer from the upper firestop element, allowing uniform temperature distribution of the firestop element, and avoiding localized high temperatures. The lower end of the partition member 17 is in line-surface contact with the lower side flame retardant member 16, reducing the contact area with the lower side flame retardant member, thereby reducing the heat conduction from the upper side (combustion side) flame retardant member to the lower side (protection side) flame retardant member, and significantly enhancing the long-time flame resistance of the sustained combustion type flame retardant 100.
In this embodiment, the flame retardant fire retardant device 100 is designed to have a fire retardant rating IIC, and the triangular slit formed by the fire retardant element 16 has a height h 2 Is 0.2mm and the thickness of the individual fire-retarding elements 16 is 15mm.
In practical use, in one embodiment, the lower part of the flame arrester of the embodiment 5 can be combined with the single-call valve to form a flame-resistant flame-retardant single-call valve through the connecting piece 2.
In one embodiment, the lower part of the continuous combustion-resistant flame arrester in the embodiment 5 can also be combined with a respiratory valve through a connecting piece 2 to form a combustion-resistant flame-retardant respiratory valve.
According to the continuous combustion-resistant flame arrester 100 disclosed by the invention, the axial heat insulation between the flame arrester plates can be realized, the heat is prevented from spreading to the protection side along the flame arrester plates, meanwhile, the radial heat transfer of the combustion flame arrester plates can be realized, the center temperature of the flame arrester plates at the combustion side is spread outwards, the temperature of the flame arrester plates is uniform, and the occurrence of center overheating is prevented, so that the long-time burning resistance of the continuous combustion-resistant flame arrester 100 is obviously enhanced. The rain cap 8 can automatically spring to the side surface position of the valve body 1 when the combustion space is continuously combusted and reaches a preset melting point, so that the upper side of the fire-retarding and fire-resisting unit 15 is completely opened to the atmosphere, flame is prevented from being combusted at the fire-retarding and fire-resisting unit 15, heat dissipation to the atmosphere is increased, and the long-time fire resistance of the continuous combustion type flame arrester 100 is further enhanced.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, in the description herein, reference to the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Rather, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that the above description is only of a preferred embodiment of the invention and is not to be construed as limiting the invention in any way. Although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the techniques described in the foregoing examples, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. A flame arrestor of the sustained combustion type comprising:
the upper end and the lower end of the valve body are respectively formed into an outlet end and an inlet end;
a fire-retarding and burn-resistant unit (15) arranged at the outlet end;
a rain cover (8) arranged above the fire-retarding and fire-resisting unit, wherein a combustion space is formed between the rain cover and the fire-retarding and fire-resisting unit, and a gas discharge channel (12) is formed at the circumferential edges of the fire-retarding and fire-resisting unit and the rain cover;
the rain cover is configured to automatically pop open when the combustion space continuously burns and reaches a preset melting point, and the fire-retarding and burning-resisting unit is configured to enable heat generated by combustion in the combustion space to be transferred outwards in a radial direction and form axial heat insulation, so that heat generated by combustion in the combustion space is prevented from being transferred to the inner cavity of the valve body.
2. The flame arrester of claim 1, wherein the valve body is configured to include a straight pipe section (4) and an expanded diameter section (5) connected to an upper end of the straight pipe section, the expanded diameter section having a diameter that increases from an inlet end to an outlet end, and a ratio of a lower end cross-sectional diameter to an upper end cross-sectional diameter of the expanded diameter section being 1:1.1 to 1: 3.
3. The continuous combustion resistant flame arrester as claimed in claim 1, wherein the flame resistant unit is fixedly mounted at the outlet end of the valve body by a support plate (6), and a pressure plate (7) is provided at the upper end of the flame resistant unit.
4. A flame arrester according to claim 3, wherein the support plate and the pressure plate are each configured to include an outer annular body (61) and a hollowed-out body (62) formed on the inner side of the outer annular body.
5. The flame arrester of the sustained combustion type as claimed in claim 3, wherein a fixing plate (14) is provided on the outer side of the valve body, the middle part of the rain cover is fixedly connected with the pressing plate through a fusible plug (11), the circumferential edge of the rain cover is configured to be folded down and connected with the fixing plate through an elastic reset piece (13),
the fusible plug fuses when reaching a preset melting point, so that the rain cover can be sprung to the side surface of the valve body under the action of the elastic resetting piece.
6. The sustained fire arrestor of claim 6, wherein the fusible plug has a melting point of 100-300 ℃.
7. A flame retardant unit according to claim 3, characterized in that the flame retardant and flame retardant unit comprises at least 2 flame retardant elements (16) and a separation element (17) arranged between adjacent flame retardant elements.
8. The sustained fire flame arrestor of claim 7, wherein a distance h between adjacent flame arrestor elements 1 Is set to 0.0-5mm.
9. The sustained fire flame arrestor of claim 7, wherein the separation element is configured to include a plurality of interconnected separation links (170),
a plurality of the partition links are arranged to be evenly spaced apart in the circumferential direction and extend radially outward from the center, or a plurality of the partition links are arranged to be mutually cross-distributed to form a net shape.
10. The flame arrestor of the sustained combustion type as claimed in claim 9, characterized in that the circumferential edge of the separation element is provided with an annular frame (171), the inner side of which is fixedly connected with the free end of each separation link.
11. A sustained fire flame retardant device as claimed in claim 9 or claim 10, wherein the upper ends of the separation elements are in surface-to-surface or line-to-surface contact with the respective fire retardant elements and the lower ends of the separation elements are in line-to-surface contact with the respective fire retardant elements.
12. The sustained fire flame retardant device of claim 7 wherein the flame retardant element is configured in a cylindrical shape having a plurality of slits, the flame retardant element having a thickness of 8-50mm.
13. The flame retardant device of claim 12, wherein the slit is formed by alternately winding a straight steel strip (160) and a corrugated steel strip (161), the slit having a height h 2 0.4-1.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210857530.2A CN117462890A (en) | 2022-07-20 | 2022-07-20 | Continuous combustion-resistant flame arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210857530.2A CN117462890A (en) | 2022-07-20 | 2022-07-20 | Continuous combustion-resistant flame arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117462890A true CN117462890A (en) | 2024-01-30 |
Family
ID=89629799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210857530.2A Pending CN117462890A (en) | 2022-07-20 | 2022-07-20 | Continuous combustion-resistant flame arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117462890A (en) |
-
2022
- 2022-07-20 CN CN202210857530.2A patent/CN117462890A/en active Pending
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