CN109937327A - Speed reduction mechanism and flame arrester with speed reduction mechanism - Google Patents
Speed reduction mechanism and flame arrester with speed reduction mechanism Download PDFInfo
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- CN109937327A CN109937327A CN201780066865.XA CN201780066865A CN109937327A CN 109937327 A CN109937327 A CN 109937327A CN 201780066865 A CN201780066865 A CN 201780066865A CN 109937327 A CN109937327 A CN 109937327A
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- deceleration mechanism
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- piping
- orifice
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- 230000007246 mechanism Effects 0.000 title claims abstract description 172
- 230000009467 reduction Effects 0.000 title claims abstract description 21
- 239000012530 fluid Substances 0.000 claims abstract description 16
- 230000000644 propagated effect Effects 0.000 claims description 26
- 230000005540 biological transmission Effects 0.000 claims description 12
- 230000001788 irregular Effects 0.000 claims description 4
- 230000001902 propagating effect Effects 0.000 abstract 2
- 238000011144 upstream manufacturing Methods 0.000 description 81
- 238000005192 partition Methods 0.000 description 47
- 230000002093 peripheral effect Effects 0.000 description 24
- 230000000694 effects Effects 0.000 description 5
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000018199 S phase Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 238000003197 gene knockdown Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/82—Preventing flashback or blowback
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2209/00—Safety arrangements
- F23D2209/10—Flame flashback
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
- Gas Burners (AREA)
- Pipe Accessories (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
The invention aims to provide a speed reducing mechanism and a flame arrester with the speed reducing mechanism, which can ensure the expected fire extinguishing performance and reduce the pressure loss. The speed reduction mechanism (4) is provided on at least one side in the axial direction of a pipe of a flame arrester (3) for extinguishing a flame propagating in the pipe, and is provided in the pipe (2) through which a combustible fluid flows, for reducing the propagation speed of the flame propagating in the pipe, wherein the speed reduction mechanism (4) is configured to communicate in the axial direction of the pipe (2), the inner surface (40) of the speed reduction mechanism (4) has a plurality of non-parallel surfaces (5B), (5C), (42C) which are not parallel to the axis, the plurality of non-parallel surfaces are arranged in parallel in the axial direction, the speed reduction mechanism (4) is alternately provided with a first communicating portion (50A) and a second communicating portion (150B) which are communicated in the axial direction of the pipe, the first communicating portion is formed by one opening, a plurality of through holes (150) are formed in a through region (T) narrower than the opening to form a second communication portion.
Description
Technical field
Fire arrester the present invention relates to deceleration mechanism and with deceleration mechanism.
Background technique
In the piping for conveying imflammable gas, the storage tank for storing flammable liquid etc., if occurred for some reason
On fire, then flame is propagated in piping or in storage tank, it is possible to can cause the major accident that explosion, detonation occurs.
As the means for preventing the danger, such as there is the back-fire relief for extinguishing the flame propagated in piping in midway
Device.Its principle, which is to be finely divided flame, makes its extinguishing.Therefore, common fire arrester is configured to have defined axial ruler
It is very little, and by that will have the metal plate coils of waveform are spiral to constitute.
It is required that such fire arrester passes through imflammable gas in general, but played in the case where generating flame
Extinguishing property.Thus, it needs to consider both extinguishing property and the pressure loss in its design.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2003-207108 bulletin
Summary of the invention
Problem to be solved by the invention
However, the distance for knock down the flame is needed in order to ensure desired extinguishing property, so as to consider to increase
The axial dimension of fire arrester.That is, increasing the pressure loss due to keeping fire arrester enlarged in the axial direction of piping.In order to
Reduce the pressure loss, it may be considered that minimize fire arrester in the axial direction of piping, but be so unable to ensure desired
Extinguishing property.I.e., it is difficult to the reduction of the pressure loss is realized while ensuring desired extinguishing property.
The object of the present invention is to provide with realize desired extinguishing property ensure it is simultaneous with the reduction of the pressure loss
Deceleration mechanism for the purpose of Gu and the fire arrester with deceleration mechanism.
The method for solving problem
Deceleration mechanism of the invention, is set in the piping that flammable fluid is flowed through, and be set to for at this
At least side in the axial direction of the piping for the fire arrester that the flame propagated in piping is put out a fire, for making in the piping
The flame transmission speed reduction of propagation, the deceleration mechanism are characterized in that the deceleration mechanism is configured in the piping
Axial direction on be connected to, the inner surface of the deceleration mechanism have it is multiple with the not parallel non-parallel face of axis, it is multiple described non-parallel
Face is arranged in side by side in the axial direction, and the deceleration mechanism alternately has coconnected first company of axial direction in the piping
Logical portion and the second interconnecting part, first interconnecting part are made of an opening, are run through in the perforation region narrower than the opening
There are multiple through holes and forms second interconnecting part.
According to above such present invention, the inner surface of the deceleration mechanism has the multiple and not parallel non-parallel face of axis,
Multiple non-parallel faces are arranged in side by side in the axial direction.Herein, although flame is flowing in the case where generating flame in piping
On the flow direction of body adverse current, but by setting non-parallel face, flame along the face extending direction of non-parallel face rap around to from
On the direction that central axis P leaves.Since non-parallel face is arranged in the axial direction side by side, occurs repeatedly flame and rap around to therefrom
The phenomenon on direction that mandrel P leaves.So, the flame propagated in piping is subdivided and is suppressed, and makes flame
Spread speed is slowed down.The deceleration mechanism for the flame transmission speed reduction propagated in piping is set in back-fire relief
In the case where the downstream side (side in axial direction) of the flow direction of flammable fluid in device, make the flame for reaching fire arrester
Flame propagation velocity is slowed down.Alternatively, the upstream side in the flow direction for fluid deceleration mechanism being arranged in fire arrester is (axial
On the other side) in the case where, make not subtracted sufficiently by the flame propagation velocity of flame that fire arrester puts out a fire and passes through the fire arrester
Speed.Therefore, even if, in the case where being minimized in the axial direction of piping, can also realize the pressure loss to fire arrester
Reduction while ensure desired extinguishing property.Thus, pass through flammable stream deceleration mechanism being arranged in fire arrester
At least side of the flow direction of body can be realized ensuring for desired extinguishing property and taking into account for the reduction of the pressure loss.
Further, which alternately has is connected in coconnected first interconnecting part of axial direction of piping and second
Portion, the first interconnecting part are made of an opening, are forming second through there is multiple through holes than being open in narrow perforation region
Interconnecting part.According to this structure, it is alternately formed continuously and to be constituted comprising non-parallel face and being open by one in the axial direction
Biggish first interconnecting part of volume and it is configured to second interconnecting part with the small volume of multiple through holes.Matching as a result,
The flame propagated in pipe iterates through size space.Thus, it is possible to fill the flame propagation velocity for the flame propagated in piping
Divide and slows down.
In addition, the aperture opening ratio of the through hole in perforation region is preferably in the range of 20%~60%.That is, if aperture opening ratio
Becoming smaller, then the pressure loss increases, therefore the upper limit of aperture opening ratio is preferably 40%, and more preferably 50%, further preferably 60%.
, whereas if aperture opening ratio becomes larger, then desired decelerability is difficult to ensure, therefore the lower limit of aperture opening ratio is preferably 20%, into
One step is preferably 30%.
In addition, in deceleration mechanism of the invention, each through hole be preferably internal diameter be 1mm~10mm, overlook it is lower in circle
Shape or the identical polygon of equivalent circle diameter, ellipse or irregular shape.According to this structure, can more effectively make
The flame propagated in piping slows down.
In addition, in deceleration mechanism of the invention, in multiple non-parallel faces, the angle of the non-parallel face and the axis
It is roughly equal respectively.According to this structure, the flame propagated in piping is subdivided and is suppressed, and keeps flame transmission fast
Degree slows down.
In addition, the angle of the non-parallel face and the axis is preferably substantially 90 degree in deceleration mechanism of the invention.
According to this structure, the volume using non-parallel face as the space in composition face can be set as enough sizes, therefore can
The flame propagation velocity for the flame propagated in piping is set sufficiently to slow down.
On the other hand, the fire arrester of the invention with deceleration mechanism is characterized in that, has the deceleration mechanism and use
In the fire arrester put out a fire to the flame propagated in the piping.
According to above such present invention, the deceleration for the flame transmission speed reduction propagated in piping is made by being arranged
Mechanism makes the flame propagation velocity for the flame propagated in piping slow down.Therefore, though to fire arrester in the axial direction of piping
In the case where being minimized, also it can ensure desired extinguishing property while realizing the reduction of the pressure loss.Cause
And at least side of the flow direction of the flammable fluid by deceleration mechanism being arranged in fire arrester, it can be realized institute's phase
Ensuring for the extinguishing property of prestige and taking into account for the reduction of the pressure loss.
In addition, the fire arrester of the invention with deceleration mechanism preferably by the deceleration mechanism be set to the fire arrester can
The two sides in the direction that combustion property fluid is flowed through.According to this structure, ensuring for desired extinguishing property can be sufficiently realized
With taking into account for the reduction of the pressure loss.
Invention effect
Deceleration mechanism according to the present invention and the fire arrester with deceleration mechanism, can be realized desired extinguishing property
Ensure to take into account with the reduction of the pressure loss.
Detailed description of the invention
Fig. 1 is the section view being indicated to the fire arrester with deceleration mechanism involved in first embodiment of the invention
Figure.
Fig. 2 is that (A) to the figure that deceleration mechanism is indicated involved in first embodiment of the invention, in Fig. 2 is
The cross-sectional view of deceleration mechanism, (B) in Fig. 2 are the top views of (A) in Fig. 2.
Fig. 3 is to the chart being indicated for confirming the experimental result of effect of the present invention.
Fig. 4 is the cross-sectional view being indicated to the variation of the fire arrester of band deceleration shown in FIG. 1 mechanism.
Fig. 5 is the figure being indicated to the variation of deceleration mechanism shown in Fig. 2, and (A) in Fig. 5 is cuing open for deceleration mechanism
View, (B) in Fig. 5 are the top views of (A) in Fig. 5.
Fig. 6 is the figure being indicated to other variations of deceleration mechanism shown in Fig. 2, and (A) in Fig. 6 is deceleration mechanism
Cross-sectional view, (B) in Fig. 6 is the top view of (A) in Fig. 6.
Fig. 7 is the figure being indicated to other another variations of deceleration mechanism shown in Fig. 2, and (A) in Fig. 7 is to slow down
The cross-sectional view of mechanism, (B) in Fig. 7 are the top views of (A) in Fig. 7.
Fig. 8 is that (A) to the figure that deceleration mechanism is indicated involved in reference example of the invention, in Fig. 8 is to indicate to subtract
The cross-sectional view of fast mechanism, (B) in Fig. 8 are the top views of (A) in Fig. 8.
Fig. 9 is the figure being indicated to the variation of deceleration mechanism shown in Fig. 8, and (A) in Fig. 9 is to indicate deceleration mechanism
Cross-sectional view, (B) in Fig. 9 is the top view of (A) in Fig. 9.
Figure 10 is the figure being indicated to other variations of deceleration mechanism shown in Fig. 8, and (A) in Figure 10 is to indicate to subtract
The cross-sectional view of fast mechanism, (B) in Figure 10 are the top views of (A) in Figure 10.
Specific embodiment
(first embodiment)
Hereinafter, referring to Fig.1, Fig. 2 to involved in first embodiment of the invention with deceleration mechanism fire arrester carry out
Explanation.As shown in Figure 1, the fire arrester 1 with deceleration mechanism of present embodiment is configured to imflammable gas (flammable stream
Body) flow through piping 2, be connected to the piping 2 fire arrester 3, be set as the deceleration mechanism 4 being connected to fire arrester 3, between piping
Cricoid gasket 6 between 2 and fire arrester 3 and deceleration mechanism 4.Fire arrester 3 is to send out in piping 2 for some reason
When raw on fire, upwardly propagated in a manner of the flowing adverse current with imflammable gas in flame propagation side in piping 2 for extinguishing
Flame mechanism, deceleration mechanism 4 is for making the mechanism that the flame propagated slows down in piping 2.Fig. 1 indicates of the invention
The cross-sectional view of fire arrester 1 with deceleration mechanism involved in first embodiment.Omitting in Fig. 1 indicates piping 2, fire arrester 3
Section shade.
Piping 2 is configured to the fixing component 7 with a pair of of pipe shaft 20,21 and fixed a pair of of pipe shaft 20,21.A pair of of pipe shaft
20, it 21 is set as separating in the axial direction, is supported in the state of fire arrester 3 and deceleration mechanism 4 between each other and is fixed structure
Part 7 is fixed.The side of the upstream side of flow direction in a pair of of pipe shaft 20,21, positioned at fluid is denoted as " upstream side pipe shaft
20 ", the other side for being located at downstream side is denoted as " downstream side pipe shaft 21 ".
Upstream side pipe shaft 20 has the upstream side pipe shaft main body 22 of tubular, is located at upstream side pipe shaft main body with being integrally constituted
The upstream side flange 23 in the downstream side of 22 flow direction.Upstream side pipe shaft main body 22 is configured to outwardly and inwardly in the upstream side
Two sides connection in the axial direction of pipe shaft main body 22, and be formed as internal diameter and become with from the upstream of flow direction towards downstream
Greatly.
A pair of of upstream side bolt for being inserted into for the bolt 71 for constituting fixing component 7 is formed on upstream side flange 23
Hole 24.A pair of of upstream side bolt hole 24 is discretely located in the radial direction (direction orthogonal to the axis) of upstream side flange 23.In addition, each
Upstream side bolt hole 24, downstream side pipe shaft 21 aftermentioned downstream side bolt hole 25 be located at the position that separates in the axial direction, it is described
Inserted with the bolt 71 of fixing component 7 in upstream side bolt hole 24 and downstream side bolt hole 25.Upstream side flange 23 is flowing
The downstream side in direction has the normal surface 23A orthogonal with the axis of upstream side pipe shaft 20.It is supported on normal surface 23A via gasket 6
It is connected to the fire extinguishing element frame 31 of fire arrester 3.
Downstream side pipe shaft 21 has the downstream side pipe shaft main body 26 of tubular, is located at downstream side pipe shaft main body with being integrally constituted
The downstream side flange 27 of the upstream side of 26 flow direction.Downstream side pipe shaft main body 26 is configured to outwardly and inwardly in the downstream side
The axial two sides connection of pipe shaft main body 26, and until the end to the end in downstream side of the upstream side of flow direction substantially
Consistently it is formed with internal diameter φ 4.It is formed on downstream side flange 27 for being inserted into for the bolt 71 for constituting fixing component 7
A pair of of downstream side bolt hole 25,25.A pair of of downstream side bolt hole 25,25 be discretely located at downstream side flange 27 radial direction (with
The orthogonal direction of axis) on.In addition, downstream side flange 27 flow direction upstream side have it is orthogonal with the axis of downstream side pipe shaft 21
Normal surface 27A.The deceleration mechanism rack 41 for having deceleration mechanism 4 is abutted at normal surface 27A via gasket 6.
Fixing component 7 be configured to have a pair of bolts 71 and be screwed together in each pair nut 72 at the both ends of each bolt 71,
72.Under the assembled state of the fire arrester 1 with deceleration mechanism, bolt 71 is inserted in upstream side bolt hole 24 and downstream side bolt
In hole 25, both ends are screwed with each nut 72 respectively.In this way, by bolt 71 and a pair of of nut 72,72, upstream side pipe shaft
20, fire arrester 3, deceleration mechanism 4 and downstream side pipe shaft 21 are from the upstream side of flow direction according to upstream side pipe shaft 20, back-fire relief
The sequence of device 3, deceleration mechanism 4 and downstream side pipe shaft 21 is fixed coaxially with each other.
Fire arrester 3 is configured to the fire extinguishing for having with aeration for being finely divided to flame and capturing heat and put out a fire
Element.In the present embodiment, using the fire extinguishing element 30 of crimp band (crimp ribbon) (corrugated plating) structure as resistance
Firearm 3.In addition, in the present embodiment, although having used the fire extinguishing element 30 of crimp band (corrugated plating) structure, the present invention is simultaneously
It is not limited to this.As fire arrester, as long as being configured to for being finely divided to flame and capturing heat and the fire extinguishing put out a fire
Element can have arbitrary shape, structure.
Fire arrester 3 be configured to have multiple (being in the example in the figures two) fire extinguishing element 30,30, for accommodating two
Fire extinguishing element frame 31, the fire extinguishing element partition for being positioned to the fire extinguishing element 30,30 of the tubular of fire extinguishing element 30,30
32.In addition, in the present embodiment, although fire arrester 3 is configured to have two fire extinguishing elements 30,30, the present invention is simultaneously unlimited
Due to this.Fire arrester is configured to have more than one fire extinguishing element 30.
Two fire extinguishing elements 30,30 are configured to have the function of same structure, roughly the same.Each fire extinguishing element 30
There is concaveconvex shape on plate thickness direction, concaveconvex shape is metal plate coils by that will be disposed in parallel on plate extending direction into spiral shell
It revolves shape and is formed, each fire extinguishing element 30 is arranged to discoid with thickness in the axial direction of piping 2.Each fire extinguishing member
Part 30 be set as being outwardly and inwardly connected in axial direction and be set as with piping 2 central axis P it is coaxial so that imflammable gas
Piping 2 axis upwardly through.
Fire extinguishing element frame 31 by outwardly and inwardly piping 2 axial direction it is coconnected in a manner of be configured at the both ends of the axial direction
Tubular with opening.
Fire extinguishing element frame 31 is configured to have: the internal diameter φ 1 of the downstream side opening portion 20a with upstream side pipe shaft 20
The first fire extinguishing space 33 of first internal diameter φ 2 below, with bigger than the first internal diameter φ 2 and with fire extinguishing element 30
The second fire extinguishing space 34 of the second roughly equal internal diameter φ 3 of outer diameter, have it is bigger than the second internal diameter φ 3 and with
The third fire extinguishing space 35 of the roughly equal third internal diameter φ 5 of the outer diameter of the deceleration mechanism rack 41 of deceleration mechanism 4.?
It puts out a fire in element frame 31, from the upstream side of flow direction, is successively arranged the first fire extinguishing space 33, second fire extinguishing space 34, the
Three fire extinguishing spaces 35.
Second fire extinguishing space 34 is configured to accommodate two fire extinguishing elements 30,30 and element partition 32 of putting out a fire.In addition,
The axial dimension in the second fire extinguishing space 34 is formed as accommodating the shape there are two fire extinguishing element 30,30 and element partition 32 of putting out a fire
The size in gap is formed under state between third fire extinguishing space 35.In addition, the circumferential surface in the second fire extinguishing space 34, from described in
The upstream side end in the second fire extinguishing space 34 plays and leaves the position to downstream side of the axial dimension of two fire extinguishing element sizes
Screw thread is carved with until portion, so as to screw togather fire extinguishing element partition 32.
Third fire extinguishing space 35 is configured to accommodate (aftermentioned) the deceleration mechanism rack 41 of gasket 6 and deceleration mechanism 4
Upstream side opening portion 41A.
Fire extinguishing element partition 32 is arranged to discoid with thickness in the axial direction of piping 2.Fire extinguishing element partition 32
Be set as its axial outwardly and inwardly connection so that imflammable gas piping 2 axis upwardly through.In addition, fire extinguishing element
Partition 32 is configured to be screwed on the quarter threaded part in the circumferential surface in the second fire extinguishing space 34 of fire extinguishing element frame 31.And
And put out a fire element frame 31 second fire extinguishing space 34 in accommodate there are two fire extinguishing element 30,30 in the state of, fire extinguishing element every
Plate 32 is screwed together in the circumferential surface in the second fire extinguishing space 34 and carves threaded part.By element partition 32 of putting out a fire, two are gone out
Fiery element 30,30 is fixed on the specified position in the second fire extinguishing space 34.The second fire extinguishing sky is screwed together in fire extinguishing element partition 32
Between 34 circumferential surface in the state of, put out a fire element partition 32 and third fire extinguishing space 35 axial direction between become do not accommodate any structure
The space of part.
In addition, in the present embodiment, the axial dimension in the second fire extinguishing space 34 is formed as first there are two putting out a fire in receiving
The space S of any component is not accommodated in the state of part 30,30 and fire extinguishing element partition 32 between third fire extinguishing space 35
Size, but the present invention is not limited to this.The axial dimension in the second fire extinguishing space 34 can also be formed as there are two the receivings
Put out a fire element 30,30 and put out a fire element partition 32 in the state of third fire extinguishing space 35 between not formed space S size.
That is, the axial dimension in the second fire extinguishing space 34 can be formed as and two put out a fire elements 30,30 and element partition 32 of putting out a fire
The roughly equal size of axial dimension.
For such fire arrester 3, third fire extinguishing space 35 is passed through from the downstream side opening portion 31B of fire extinguishing element frame 31
And two fire extinguishing elements 30,30 are inserted into the second fire extinguishing space 34, and fire extinguishing element partition 32 is screwed on the second fire extinguishing sky
Between 34 circumferential surface in quarter threaded part.Thus fire arrester 3 is assembled.In the fire arrester 3 under such assembled state,
Upstream side of the upstream side opening portion 31A of fire extinguishing element frame 31 being connected to upstream side pipe shaft 20 in a manner of holding shim 6
The normal surface 23A of flange 23, thus by upstream side pipe shaft 20 support, by third put out a fire space 35 in insertion gasket 6 with
And the upstream side opening portion 41A on the flow direction of the deceleration mechanism rack 41 of deceleration mechanism 4, to make to put out a fire under element frame 31
Side opening portion 31B is swum to be supported by deceleration mechanism 4.It is supported between upstream side pipe shaft 20 and deceleration mechanism 4 by fire arrester 3
It, will fire extinguishing element 30, fire extinguishing element frame 31 and fire extinguishing element partition in the mode coaxial with the central axis P of piping 2 under state
32 is fixed.
In addition, in the present embodiment, being directly screwed together in fire extinguishing element frame 31 by the element partition 32 that will put out a fire to complete
Two fire extinguishing elements 30,30 and the fixation put out a fire between element partition 32 and element frame 31 of putting out a fire, but the present invention does not limit
In this.Two fire extinguishing elements 30,30 and the fixation put out a fire between element partition 32 and element frame 31 of putting out a fire can be used for example
The fixing components such as bolt are completed, and well known fixing means unlike this can be used also to carry out.It is possible to further structure
Become, in the state that fire arrester 3 and deceleration mechanism 4 are in close contact via gasket, passes through the upstream with upstream side pipe shaft 20
The downstream side flange 27 of side flange 23 and downstream side pipe shaft 21 is clamped, and is fastened with a pair of bolts 71, thus fixed
Fire extinguishing element 30,30.
As shown in Figure 1, deceleration mechanism 4 is configured to have multiple (being in the example in the figures four) orifice elements 15
The deceleration mechanism rack 41 of (component), tubular for accommodating four orifice elements 15 determines four orifice elements 15
The throttle orifice partition 42 of position.In the present embodiment, deceleration mechanism 4 is located at adjacent with the downstream side of the flow direction of fire arrester 3
The position connect.In addition, in the present embodiment, deceleration mechanism 4 is configured to have four orifice elements 15, but the present invention is not
It is defined in this.Deceleration mechanism is configured to have more than one orifice element (component).
As shown in Figure 1, four orifice elements 15 are configured to have the function of same structure, roughly the same.Four
A orifice element 15 is configured to mutual fission in a pre-assembly condition.Each orifice element 15 is set as having in the axial direction
Thickness it is discoid.Outwardly and inwardly connection that each orifice element 15 is set as in the axial direction of each orifice element 15 and with match
The central axis P of pipe 2 is coaxial, so that imflammable gas passes through in the axial direction.
As shown in Fig. 2, each orifice element 15 have as with constitute deceleration mechanism rack 41 in the first deceleration space 43
The outer peripheral surface 5A of barrel surface that is in contact of circumferential surface, and each orifice element 15 is formed to have the disk of outer diameter φ 6
Shape.In addition, as shown in Figure 1, each orifice element 15 has the first segment discharge orifice space 50A for passing through for imflammable gas
(the first interconnecting part) and set on the flow direction of first segment discharge orifice space 50A downstream side and with first segment discharge orifice space 50A connect
The second continuous throttle orifice space 150B (the second interconnecting part).In addition, in the present embodiment, the axis of first segment discharge orifice space 50A
Equal size, and axial dimension are shaped generally as to the axial dimension L2 of size L1 and the second throttle orifice space 150B
L1, L2 are formed as 30mm or so.In addition, the internal diameter φ 7 of first segment discharge orifice space 50A is formed as 150mm or so.In addition,
The volume of first segment discharge orifice space 50A is formed larger than the volume of the second throttle orifice space 150B.In the assembled state, four sections
Discharge orifice component 15 is set side by side as the first segment discharge orifice space 50A from the upper side of flow direction and the second throttle orifice space 150B
It is alternately repeated.
As shown in Figure 1, such orifice element 15 constitutes the inner surface passed through for imflammable gas in the assembled state
40 a part (throttling internal surface of hole 4A).The internal surface of hole 4A that throttles has positioned at the throttling of first segment discharge orifice space 50A and second
It is the boundary of hole space 150B and normal surface 5B, 5C (non-parallel face) orthogonal to the axis, flat with axis from the outer rim b of normal surface 5C
The upstream side inner peripheral surface 5D that extends capablely and what is extended parallel between normal surface 5B, 5C and from a of inner edge with axis pass through
Each through hole 150 of logical portion 5E, by from the upper side of flow direction according to upstream side inner peripheral surface 5D, normal surface 5C, perforation
Portion 5E, normal surface 5B sequence they are carried out to continuously repeat setting, thus constitute throttling internal surface of hole 4A.In addition, in each section
In discharge orifice component 15, first segment discharge orifice space 50A is positioned at the space of the inside of upstream side inner peripheral surface 5D, the second throttle orifice space
150B is positioned at the space of the inside of through portion 5E.Second throttle orifice space 150B by be formed in through portion 5E multiple (37
It is a) composition of through hole 150.Hereinafter, being passed through being denoted as in through portion 5E from the region that the direction orthogonal with central axis P (axis) is observed
Logical region T.In the present embodiment, as shown in the single dotted broken line in (B) in Fig. 2, perforation region T is formed as round.Perforation
The internal diameter φ 8 of portion 5E (perforation region T) is formed as 20mm or so.In addition, as shown in (B) in Fig. 2, each through hole 150
The section for being formed as orthogonal with the axis of orifice element 15 is circle.In addition, in the present embodiment, each formation of through hole 150
It is 2mm or so for internal diameter φ 10.37 through holes 150 are formed in through portion 5E (perforation region T).
In addition, in the present embodiment, it is 2mm or so that each through hole 150, which is formed as internal diameter φ 10, but of the invention
It is not limited to this.The internal diameter φ 10 of each through hole 150 can be 2mm or less.In addition, the internal diameter of each through hole 150
As long as φ 10 is 1mm or more.In addition, the internal diameter φ 10 of each through hole 150 can be 2mm or more.In addition, each perforation
The internal diameter φ 10 in hole 150 can be 5mm or more, or 8mm or more.The internal diameter φ of each through hole 150 10
It to be 10mm or less.
The normal surface 5C of each orifice element 15 is set as substantially orthogonal with the central axis P of orifice element 15.That is, each section
The normal surface 5C of discharge orifice component 15 is the face not parallel with the central axis P of orifice element 15 (plane).Each orifice element 15
Upstream side inner peripheral surface 5D be configured to have using the central axis P of orifice element 15 as the opening (barrel surface) of axis.Each throttle orifice
The upstream side inner peripheral surface 5D of component 15 is made of the face (curved surface) parallel with the central axis P of orifice element 15.In addition, as schemed
1, shown in Fig. 2, the internal diameter φ 8 (as shown in Figure 2) of the through portion 5E of each orifice element 15 and downstream side pipe shaft 21 it is interior
Diameter size φ 4 (as shown in Figure 1) is shaped generally as equal size.In addition, in the present embodiment, it is " parallel with central axis P
Face (curved surface) " refers to the face all roughly equal at a distance of the distance of central axis P of any position in the axial direction in the face, " with center
Axis P not parallel face (plane) " refers to the face for having defined angle relative to central axis P.
In the present embodiment, the internal diameter φ 7 of first segment discharge orifice space 50A is defined as 150mm or so, but this hair
It is bright that it's not limited to that.As internal diameter φ 7 or 100mm or less.It can be substantially as internal diameter φ 7
100mm or less, or 80mm or less.In addition, as long as the internal diameter φ 7 of first segment discharge orifice space 50A is 60mm or more
?.In addition, the internal diameter φ 7 of first segment discharge orifice space 50A can be 100mm or more.Can be as internal diameter φ 7
100mm or more, or 200mm or more.As long as the substantially 300mm or less of internal diameter φ 7 of first segment discharge orifice space 50A
?.
In addition, in the present embodiment, axial dimension L1, L2 of each orifice element 15 are defined as 30mm or so, but
The present invention is not limited to this.It can be 30mm or less as axial dimension L1, L2.Can be as axial dimension L1, L2
20mm or less, or 10mm is hereinafter, can also be 5mm or less.As long as axial dimension L1, L2 of each orifice element 15 are big
It causes to be 2mm or more.
As shown in Figure 1, deceleration mechanism rack 41 is outwardly and inwardly in upstream side pipe shaft 20 and the axis of downstream side pipe shaft 21
It is configured to the tubular that there is opening portion 41A, 41B at axial both ends to coconnected mode.By the opening of deceleration mechanism rack 41
A Fang Jiwei " upstream side opening portion 41A " for the upstream side of flow direction in portion 41A, 41B, positioned at fluid, under being located at
Another party of trip side is denoted as " downstream side opening portion 41B ".
As shown in Figure 1 and Figure 2, deceleration mechanism rack 41 is configured to have: having the outer diameter φ with each orifice element 15
It is first deceleration space 43 of 6 internal diameters roughly equal (shown in Fig. 2), small with the internal diameter than the first deceleration space 43
The 5th internal diameter φ 9 the second deceleration space 44.First deceleration space 43 is located at the flow direction in the second deceleration space 44
Upstream side.The inner peripheral surface 44A in the second deceleration space 44 is constituted by the curved surface structure parallel with the central axis P of each orifice element 15
At.The upstream side inner peripheral surface 5D of the inner peripheral surface 44A and each orifice element 15 that constitute the second deceleration space 44 are formed are as follows: from subtracting
Distance D1 until the central axis P of fast mechanism rack 41 and each orifice element 15 plays each inner peripheral surface 44A, the 5D is substantially phase
Deng distance.
First deceleration space 43 is configured to accommodate four orifice elements 15 and throttle orifice partition 42.In addition, the
The axial dimension in one deceleration space 43 is formed as in the state of accommodating there are four orifice element 15 and throttle orifice partition 42
The size in gap is formed between the upstream side opening portion 41A of deceleration mechanism rack 41.In addition, the week in the first deceleration space 43
On face, from the position to upstream side for the axial dimension for leaving four 15 sizes of orifice element from the 41B of the downstream side opening portion
It is carved with screw thread until the 41A of opening portion, so as to screw togather throttle orifice partition 42.
As shown in Fig. 2, throttle orifice partition 42 is set as having the discoid of thickness in the axial direction of piping 2.Throttle orifice every
Plate 42 is set as its axial outwardly and inwardly connection so that imflammable gas piping 2 axis upwardly through.
Throttle orifice partition 42 be configured to opposite one another upstream side normal surface 42A and downstream side normal surface 42C, with
The consecutive inner peripheral surface 42B of each inner edge a of upstream side normal surface 42A and downstream side normal surface 42C.Upstream side normal surface 42A
And downstream side normal surface 42C is set as orthogonal with the axis of throttle orifice partition 42, inner peripheral surface 42B is set as parallel with the axis.Section
The slave through portion 5E of distance D2 and each orifice element 15 until slave central axis P to inner peripheral surface 42B of discharge orifice partition 42
The distance D2 of (perforation region T) until a of inner edge is shaped generally as equal distance.
Such throttle orifice partition 42 be configured to in the circumferential surface in the first deceleration space 43 of deceleration mechanism rack 41
Threaded part is carved to be screwed.Moreover, accommodating in the first deceleration space 43 of deceleration mechanism rack 41, there are four throttle orifice structures
In the state of part 15, throttle orifice partition 42 is screwed together in the quarter threaded part in the circumferential surface in the first deceleration space 43.Pass through section
Four orifice elements 15 are fixed on the specified position in the first deceleration space 43 by discharge orifice partition 42.
In addition, as shown in Figure 1, in the assembled state, throttle orifice partition 42 constitutes logical for imflammable gas in deceleration mechanism 4
The a part (partition inner surface 4B) for the inner surface 40 crossed.Partition inner surface 4B is configured to have in the assembled state and positioned at most
The continuous downstream side normal surface 42C of upstream side inner peripheral surface 5D of the orifice element 52 (15) of upstream side, from downstream side normal surface
The inner edge a of 42C plays the inner peripheral surface 42B extended parallel to axis, the upstream side continuous and orthogonal to the axis with the upper limb of inner peripheral surface 42B
Normal surface 42A.
For such deceleration mechanism 4, from the upstream side opening portion 41A of deceleration mechanism rack 41 by four orifice elements
In 15 the first deceleration spaces 43 of insertion, throttle orifice partition 42 is made to be screwed together in the circumferential surface in the first deceleration space 43 in this state.Such as
Four orifice elements 15 and throttle orifice partition 42 are fixed on deceleration mechanism rack 41 by this.
In addition, in the present embodiment, completing four by the way that throttle orifice partition 42 is directly screwed together in deceleration mechanism rack 41
Fixation between a orifice element 15 and throttle orifice partition 42 and deceleration mechanism rack 41, but the present invention is not limited to this.
It is solid that bolt etc. can be used for example in fixation between four orifice elements 15 and throttle orifice partition 42 and deceleration mechanism rack 41
Component is determined to complete, and well known fixing means unlike this also can be used.It is possible to further be configured to, make back-fire relief
Device 3 and deceleration mechanism 4 be via gasket and in the state of being in close contact, by with the upstream side flange 23 of upstream side pipe shaft 20 and under
The downstream side flange 27 of trip side pipe body 21 is clamped, and is fastened with a pair of bolts 71, thus fixed restriction pole 15.
In the state that throttle orifice partition 42 is screwed together in the circumferential surface in the first deceleration space 43, in screwing togather for throttle orifice partition 42
The space for not accommodating any component is formed between position and the upstream side opening portion 41A of deceleration mechanism rack 41.That is, in speed reducer
Under the assembled state of structure 4, screwing togather between position and the upstream side opening portion 41A of deceleration mechanism rack 41 for throttle orifice partition 42 is (empty
Between) be made of a part of 43A of the upstream side in the circumferential surface in the first deceleration space 43 of deceleration mechanism rack 41.The upstream side
The upstream side normal surface 42A of a part of 43A and throttle orifice partition 42 are continuous, constitute a part of the inner surface 40 of deceleration mechanism 4.
In addition, in the present embodiment, one of the upstream side in the circumferential surface in the first deceleration space 43 of deceleration mechanism rack 41
Part 43A is set as not accommodating the space of any component, but the present invention is not limited to this.Speed reducer can also be not at
Space at a part of 43A of upstream side in the circumferential surface in the first deceleration space 43 of framework 41.That is, the first deceleration space 43
Axial dimension can be formed as the size roughly equal with the axial dimension of four orifice elements 15 and throttle orifice partition 42.
In addition, in the state that the circumferential surface in throttle orifice partition 42 and the first deceleration space 43 screws togather, positioned at most downstream side
The space for not accommodating any component is formed between orifice element 51 (15) and the downstream side opening portion 41B of deceleration mechanism rack 41
(the second deceleration space 44).That is, the second deceleration space 44 is made of the inner peripheral surface 44A for constituting the space 44.Inner peripheral surface 44A with
Normal surface 5B phase positioned at the orifice element 51 of most downstream side is continuous, constitutes a part of the inner surface 40 of deceleration mechanism.
So assemble the deceleration mechanism 4 with inner surface 40, the inner surface 40 has the circumferential surface of deceleration mechanism rack 41
A part of 43A, partition inner surface 4B, throttling internal surface of hole 4A and deceleration mechanism rack 41 inner peripheral surface 44A.
Under the assembled state of deceleration mechanism 4, normal surface 5B, 5C of each orifice element 15 and throttle orifice partition 42
Downstream side normal surface 42C is functioned as " non-parallel face ".Below sometimes by the normal surface 5B of each orifice element 15,
The downstream side normal surface 42C of 5C and throttle orifice partition 42 is referred to as " non-parallel face ".
Next, being illustrated to the step of assembling fire arrester 1 with deceleration mechanism.
Pre-assembly fire arrester 3 and deceleration mechanism 4 respectively.For fire arrester 3, make the upstream side of fire extinguishing element frame 31
Opening portion 31A is connected to the normal surface 23A of the upstream side flange 23 of upstream side pipe shaft 20 in a manner of holding shim 6, will put out a fire
The downstream side opening portion 31B insertion third fire extinguishing space 35 of element frame 31.In addition, making deceleration mechanism rack for deceleration mechanism 4
41 downstream side opening portion 41B is connected to the normal surface of the downstream side flange 27 of downstream side pipe shaft 21 in a manner of holding shim 6
27A.In this state, bolt 71 is inserted into each bolt hole 24,25 of upstream side pipe shaft 20 and downstream side pipe shaft 21, in spiral shell
The both ends of bolt 71 screw togather each nut 72.In this way, the piping 2 being made of upstream side pipe shaft 20 and downstream side pipe shaft 21, fire arrester 3
And deceleration mechanism 4 is assembled into the fire arrester 1 with deceleration mechanism with the central axis P of piping 2 coaxial arrangement.
According to such fire arrester 1 with deceleration mechanism, inner surface 4A, 4B, 43A, 44A have multiple not parallel with axis
Non-parallel face 5B, 5C, 42C, multiple non-parallel face 5B, 5C, 42C are set side by side along axial direction.Herein, fire is generated in piping 2
In the case where flame, flame fair current or adverse current on the flow direction of fluid, but pass through setting non-parallel face 5B, 5C, 42C, fire
Flame is rapped around to from the direction that central axis P leaves along the face extending direction (radial direction of piping 2) of non-parallel face 5B, 5C, 42C.
Since non-parallel face 5B, 5C, 42C are set side by side along axial direction, occur repeatedly flame and rap around to from the direction that central axis P leaves
On phenomenon.So, by making to make flame slow down and being piped the flame propagated in 2 and occurring repeatedly wraparound phenomenon.Pass through
The deceleration mechanism 4 for making the flame propagated in piping 2 slow down like this is located to the flowing of the flammable fluid in fire arrester 3
Direction side (axial side), so that the flame for reaching fire arrester 3 be made to slow down.Therefore, even if making fire arrester 3 be piped 2
In the case where minimizing in axial direction, the reduction of the pressure loss and ensuring for flow also can be realized, while ensuring desired go out
Fiery performance.Further, by such deceleration mechanism 4 is located at fire arrester 3 flammable fluid flow direction at least
Side can make fire arrester 3 in the radially miniaturization of piping 2, even if in this case, also can be realized subtracting for the pressure loss
It is few and flow to ensure, while ensuring desired extinguishing property.Thus, by by deceleration mechanism 4 be located in fire arrester 3 can
At least side of the flow direction of combustion property fluid, can be realized the reduction of desired extinguishing property ensured with the pressure loss
(ensuring for flow) is taken into account.
Further, which alternately has the axial direction coconnected first segment discharge orifice space 50A in piping 2
(the first interconnecting part) and the second throttle orifice space 150B (the second interconnecting part), first segment discharge orifice space 50A are made of an opening,
There are multiple (37) through holes 150 and the second throttle orifice space 150B of formation than being open in narrow perforation region T to run through.According to
Such structure, be alternately formed continuously in the axial direction comprising non-parallel face 5B, 5C and by one be open the volume that constitutes compared with
Big first segment discharge orifice space 50A and the second throttle orifice sky for being configured to that there is the small volume of multiple (37) through holes 150
Between 150B.The flame propagated in piping 2 as a result, iterates through size space.Thus, it is possible to make the fire propagated in piping 2
The flame propagation velocity of flame is sufficiently slowed down.
In addition, the aperture opening ratio of the through hole 150 in perforation region T is preferably in the range of 20%~60%.That is, if opening
Mouth rate becomes larger, then the pressure loss increases, therefore the upper limit of aperture opening ratio is preferably 60%, and more preferably 50%, further preferably
40%., whereas if aperture opening ratio becomes smaller, then desired decelerability is difficult to ensure, therefore the lower limit of aperture opening ratio is preferably
20%, further preferably 30%.
In addition, in deceleration mechanism 4 of the invention, each through hole 150 be preferably internal diameter be 1mm~10mm, overlook under
The identical polygon of rounded or equivalent circle diameter, ellipse or irregular shape.It according to this structure, can be more effective
Ground makes the flame propagated in piping 2 slow down.
Next, the present inventor carried out large number of experiment or even simulation as a result, having found perforation
The proper range of aperture opening ratio in portion 5E.That is, aperture opening ratio is preferably 20%~60%.If aperture opening ratio becomes smaller, the pressure loss
Increase, therefore the upper limit of aperture opening ratio is preferably 40%, more preferably 50%, further preferably 60%., whereas if aperture opening ratio
Become larger, is then difficult to ensure desired decelerability, therefore the lower limit of aperture opening ratio is preferably 20%, further preferably 30%.
In addition, in deceleration mechanism 4 of the invention, each through hole 150 be preferably internal diameter be 1mm~10mm, overlook under
Rounded shape.According to this structure, the flame propagated in piping 2 can more effectively be made to slow down.
In addition, it is non-flat that multiple non-parallel face 5B, 5C, 42C are respectively formed as this in the deceleration mechanism 4 of present embodiment
The angle of row face 5B, 5C, 42C and central axis P (axis) are roughly equal.According to this structure, by making to propagate in piping 2
Flame occurs repeatedly wraparound phenomenon and flame can be made to slow down.
In addition, in the deceleration mechanism 4 of present embodiment, the angle shape of non-parallel face 5B, 5C, 42C and central axis P (axis)
As substantially 90 degree.According to this structure, the volume using non-parallel face 5B, 5C, 42C as the space in composition face can be set
For enough sizes, therefore the flame propagated in piping 2 can be made sufficiently to slow down.
In addition, the deceleration mechanism 4 of present embodiment is preferably configured as with the coconnected multiple throttlings of axial direction in piping 2
Pole 15 (component), and at least there are two non-parallel face 5B, 5C, 42C for tool respectively for multiple orifice elements 15 (component).According to
Such structure can change the number of component according to required performance.Thus, it is possible to form the high mechanism of versatility.
The a part in plurality of experiment or even simulation carried out below to the present inventor is illustrated.
In the fire arrester 1 with deceleration mechanism of present embodiment, with the range of 30mm~60mm in first segment discharge orifice space 50A
Diameter size φ 7 is appropriately configured, and the internal diameter φ 8 of through portion 5E is set as 20mm, with the range of 7mm~42mm to each
The axial dimension L1 of orifice element 15 is appropriately configured, and it is 2mm that each through hole 150, which is set as diameter, in through portion 5E
It is formed with 37 through holes 150.Therefore, the aperture opening ratio in through portion 5E is 37%.
It is appropriately configured, and surveyed with number of 1~15,20 range to the orifice element 15 for being constituted deceleration mechanism 4
Measure flame transmission speed.By result note in the circular mark of Fig. 3.The number (n) of orifice element 15 is set as 1~
15,20 each number respectively obtains 3 data in the case where each number.Only in the number (n) of orifice element 15
In the case where 5,10,15,5 data are respectively obtained.
In Fig. 3, the longitudinal axis is flame speed (Flame velocity) [m/s], and horizontal axis is the number of orifice element
(Number of Orifice:n).When the internal diameter φ 7 of first segment discharge orifice space 50A is set as 60mm, by each throttle orifice
The axial dimension L1 of component 15 is set as 14mm, the internal diameter φ 8 of through portion 5E is set as 20mm, and will be in through portion 5E
Aperture opening ratio when being set as 37%, confirm flame transmission speed and slowed down.
When constituting the number of orifice element 15 of deceleration mechanism 4 is n >=8, it is barely perceivable orifice element 15
Number (n) variation brought by influence to flame transmission speed difference.In addition, confirming when orifice element 15
Number when being n >=8, as the number of orifice element 15 increases, flame transmission speed further slowed down.
In addition, the present inventor is in the fire arrester 1 with deceleration mechanism of present embodiment with 30mm~60mm's
The internal diameter φ 7 of first segment discharge orifice space 50A is appropriately configured in range, and the internal diameter φ 8 of through portion 5E is set
For 20mm, it is appropriately configured with axial dimension L1 of the range of 7mm~42mm to each orifice element 15, by each through hole
150 are set as diameter as 2mm, and 58 through holes 150 are formed in through portion 5E.Therefore, the aperture opening ratio in through portion 5E is set
It is 58%, is appropriately configured with number of 1~20 range to the orifice element 15 for being constituted deceleration mechanism 4, and measure fire
The spread speed of flame.By result note in Fig. 3 × label in.By the number (n) of orifice element 15 be set as 1~20 it is each
Number respectively obtains 2 data in the case where each number.In addition, for expecting that result will appear the condition of deviation,
Addition tests several times and obtains data.
It confirms when the aperture opening ratio in through portion 5E is set as 58%, flame transmission speed is slowed down.Separately
Outside, it confirms when constituting the number of orifice element 15 of deceleration mechanism 4 is n >=4, as number increases, flame transmission
Speed is slowly slowed down.In addition, if the case where with aperture opening ratio being 58% to the case where aperture opening ratio is 37% be compared,
It then confirms under conditions of the number of orifice element 15 is less, it is more effective that aperture opening ratio, which is 37%, and works as throttle orifice structure
When the number of part 15 is n >=5, difference is not observed in the deceleration of flame transmission speed.
It further include the other structures etc. that can reach the purpose of the present invention additionally, this invention is not limited to above embodiment,
Variation as shown below is also included in the present invention.
In addition, in above-mentioned first embodiment, under the assembled state of deceleration mechanism 4, four orifice elements 15
First segment discharge orifice space 50A and the second throttle orifice space are alternately repeatedly set side by side with from the upper side of flow direction
150B, but the present invention is not limited to this.It is also possible to replace from the upper side of flow direction with four orifice elements 15
It is repeatedly set side by side with the mode of the second throttle orifice space 150B and first segment discharge orifice space 50A, to axial one end and separately
One end is overturned using deceleration mechanism 4.
In addition, in the above-described first embodiment, deceleration mechanism 4 is located at and the downstream side of the flow direction of fire arrester 3 neighbour
The position connect, but the present invention is not limited to this.As shown in figure 4, deceleration mechanism 4 can be set to two sides in fire arrester 3 with
The fire arrester 3 is adjacent.That is, as shown in figure 4, the fire arrester 10 with deceleration mechanism be configured to include imflammable gas it is (flammable
The fluid of property) flow through piping 2, be connected to the piping 2 fire arrester 3, fire arrester 3 two sides and be connected to the fire arrester 3
A pair of of deceleration mechanism 4 of setting, 4, between piping 2 and the cricoid gasket 6 between fire arrester 3 and deceleration mechanism 4.In addition,
The downstream side in the flow direction of fire arrester 3 can be set in deceleration mechanism 4.In addition, deceleration mechanism 4 and fire arrester 3 can not be located
On adjoining position.That is, other components can be equipped between deceleration mechanism 4 and fire arrester 3.Fig. 4 is to indicate band shown in FIG. 1
The cross-sectional view of the variation of the fire arrester 1 of deceleration mechanism.In addition, in Fig. 4, it is roughly the same with first embodiment to having
Function, the identical appended drawing reference of component mark of same structure simultaneously omit the description.It according to this structure, can be abundant
Ensure desired extinguishing property, while realizing the reduction of the pressure loss.
In addition, first segment discharge orifice space 50A is positioned at the inside of upstream side inner peripheral surface 5D in each orifice element 15 '
Space, the second throttle orifice space 150B be positioned at through portion 5E ' inside space.In the present embodiment, as in Fig. 5
(B) shown in the single dotted broken line in, through portion 5E ' is formed as regular hexagon.Fig. 5 is the variation to deceleration mechanism 4 shown in Fig. 2
The figure being indicated.In addition, in Fig. 5, to the function roughly the same with above embodiment, same structure
Component marks identical appended drawing reference and omits the description.It plays as a result, and the rough identical effect of first embodiment.
In above-mentioned first embodiment, each through hole 150 is formed as the section orthogonal with the axis of orifice element 15
It is rounded, but the present invention is not limited thereto.As shown in fig. 6, each through hole 250B being formed in through portion 5E " can be formed
For with orifice element 15 " the orthogonal section of axis be in regular hexagon (regular polygon).Alternatively, each through hole with throttle orifice structure
The orthogonal section of the axis of part can be in polygon, ellipse or irregular shape.At this point, the equivalent circle diameter of each through hole can
To be formed as the size roughly equal with the internal diameter φ 10 of each through hole 150.It according to this structure, can be more effectively
The flame propagated in piping 2 is set to slow down.
In addition, in the first embodiment, by from the upper side of flow direction according to upstream side inner peripheral surface 5D, orthogonal
Face 5C, through portion 5E, normal surface 5B sequence continuously repeat setting to them to constitute the throttle orifice structure under assembled state
Part 15, but the present invention is not limited thereto.As shown in fig. 7, can be by the upstream side from flow direction according to upstream side inner circumferential
Face 105E (non-parallel face), through portion 105F, normal surface 105C (non-parallel face) sequence they are carried out to continuously repeat setting
To constitute the orifice element 105 under assembled state.Upstream side the inner peripheral surface 105E and through portion 105F of each orifice element 105
Boundary m be located at the axial centre of each orifice element 105.Upstream side inner peripheral surface 105E is configured to have with towards fluid
Flow direction downstream and the gradually smaller inclination of radial dimension.Through portion 105F and the central axis P of piping 2 are carried out in parallel
Extend.
In addition, first segment discharge orifice space 350A is positioned at the interior of upstream side inner peripheral surface 105E in each orifice element 105
The space of side, the second throttle orifice space 350B are positioned at the space of the inside of through portion 105F.In the present embodiment, such as Fig. 7
In (B) in single dotted broken line shown in, through portion 105F is formed as regular hexagon, and is configured to have multiple through holes 350.
In addition, each through hole 350 is formed as the circular cross section orthogonal with the axis of orifice element 105 as shown in (B) in Fig. 7.
(reference example)
Then, deceleration mechanism involved in reference example is illustrated referring to (A), (B) in Fig. 8.(A) in figure Fig. 8
It is the cross-sectional view for indicating deceleration mechanism 144, (B) in Fig. 8 is the top view of (A) in Fig. 8.In addition, (A) in fig. 8,
(B) in, identical attached drawing mark is marked to the component with the function roughly the same with first embodiment, same structure
Remember and the description thereof will be omitted.Deceleration mechanism 144 involved in reference example is configured to have an orifice element 145, the throttle orifice
Component 145 has multiple space 145A~145D in inside, and is made of a continuous component.
As shown in (A) in Fig. 8, orifice element 145 is set as its axial outwardly and inwardly connection, and is set as
With piping 2 central axis P it is coaxial so that imflammable gas piping 2 axis upwardly through.The orifice element 145 has the
One throttle orifice space 145A, be located at first segment discharge orifice space 145A fluid flow direction downstream side and with first segment discharge orifice
Space 145A continuous second throttle orifice space 145B, be located at the second throttle orifice space 145B flow direction downstream side and with
Second throttle orifice space 145B continuous third throttle orifice space 145C, set on the flow direction of third throttle orifice space 145C
Downstream side and with the continuous 4th throttle orifice space 145D of third throttle orifice space 145C, and be repeatedly formed above-mentioned space
145A,145B,145C,145D.In addition, above-mentioned throttle orifice space 145A~145D is created as volume in the same size
Space.
From the upper side of flow direction, four space forming portions of above-mentioned each throttle orifice space 145A~145D are formed
It is respectively provided in 90 degree of the position of being respectively staggered clockwise.That is, being respectively formed four spaces of throttle orifice space 145A~145D
Forming portion is set as mutual bias.
First segment discharge orifice space 145A is the inner space such as down space forming portion, the space forming portion be configured to have with
Central axis P parallel inner surface 14A1, the normal surface continuous and orthogonal with central axis P with the axial both ends of inner surface 14A1
14A2,14A3 (non-parallel face).Normal surface 14A2 is set to the upstream side of flow direction, and normal surface 14A3 is set to than normal surface 14A2
By the position in the downstream side of flow direction.Second throttle orifice space 145B is the inner space such as down space forming portion, the space
Forming portion is configured to the axial both ends with the inner surface 14B1 parallel with central axis P and inner surface 14B1 continuously and in
Mandrel P orthogonal normal surface 14B2,14B3 (non-parallel face).Normal surface 14B2 is set to the upstream side of flow direction, normal surface
14B3 is set to the position than normal surface 14B2 by the downstream side of flow direction.Third throttle orifice space 145C is that down space such as is formed
The inner space in portion, the space forming portion are configured to the axis with the inner surface 14C1 parallel with central axis P and inner surface 14C1
To continuous and orthogonal with central axis P normal surface 14C2, the 14C3 (non-parallel face) in both ends.Normal surface 14C2 is set to flow direction
Upstream side, normal surface 14C3 be set to than normal surface 14C2 by flow direction downstream side position.4th throttle orifice space
145D is the inner space such as down space forming portion, which is configured to have the inner surface parallel with central axis P
14D1, normal surface 14D2, the 14D3 (non-parallel face) continuous and orthogonal with central axis P with the axial both ends of inner surface 14D1.
Normal surface 14D2 is set to the upstream side of flow direction, and normal surface 14D3 is set on the downstream side for leaning on flow direction than normal surface 14D2
Position.
According to the deceleration mechanism 144 with such orifice element 145, flame can be made sufficiently to slow down.That is, above-mentioned
In the deceleration mechanism 4 of first embodiment, the throttle orifice space 50B shape of the biggish throttle orifice space 50A of volume and small volume
As alternately continuous in the axial direction, by making the flame propagated in piping 2 iterate through biggish space 50A, lesser
Space 50B and so that the flame propagated in piping 2 is sufficiently slowed down, but the present invention is not limited to this.Also it is configured to repeat
By the throttle orifice space 145A~145D for being shaped generally as the volume of same size.
In addition, from the upper side of flow direction, forming each throttle orifice space 145A~145D in above-mentioned reference example
Four space forming portions be arranged on 90 degree of the position of being respectively staggered clockwise, but the present invention is not limited to this.For example, just subtracting
For the orifice element 245 of fast mechanism 244, as shown in (A) in Fig. 9, (B) in Fig. 9, each throttle orifice space 245A~
245D can with from the upper side of flow direction in the axial direction according to throttle orifice space 245A, throttle orifice space 245C, throttling
Hole space 245B, throttle orifice space 245D sequence formed, Clamping Center axis P and the throttle orifice space for being located at opposed locations
245A and throttle orifice space 245C and Clamping Center axis P and be located at opposed locations throttle orifice space 245B and throttle orifice
Space 245D can be in centered on central axis P and be displaced the position after 90 degree.Fig. 9 is to indicate deceleration mechanism shown in Fig. 8
Variation figure, (A) in Fig. 9 is the cross-sectional view for indicating deceleration mechanism, and (B) in Fig. 9 is the top view of (A) in Fig. 9.
In addition, as shown in (A) in Figure 10, (B) in Figure 10, for example, the orifice element 345 of deceleration mechanism 344
Each throttle orifice space 345A, 345C can with from the upper side of flow direction in the axial direction according to throttle orifice space 345A, section
The sequence of discharge orifice space 345C is formed, and throttle orifice space 345A, 345C can be set side by side as Clamping Center axis P and be located at pair
Seated position.Figure 10 is the figure for indicating the variation of deceleration mechanism shown in Fig. 8, and (A) in Figure 10 is to indicate cuing open for deceleration mechanism
View, (B) in Figure 10 are the top views of (A) in Figure 10.
In addition, in the present embodiment, deceleration mechanism 144,244,344 is configured to tool, and there are four space forming portions, still
The present invention is not limited thereto.As long as deceleration mechanism is configured to have more than two (multiple) spaces forming portion.In addition, though
Deceleration mechanism 144,244,344 is made of a component with multiple space forming portions, but the present invention is not limited thereto.
Deceleration mechanism is configured to have multiple at least with the component of a space forming portion.In addition, deceleration mechanism 144,244,
344 can be arranged on the boundary of adjacent space forming portion and be formed with the board members (not shown) of multiple through holes.I.e., it is possible to
Multiple through holes are formed with defined aperture opening ratio in the perforation region with multiple through holes of board member.It plays as a result, and the
The roughly the same effect of the deceleration mechanism 4 of one embodiment.
In addition, as long as multiple space forming portions are set as from the upper side of flow direction in the axial direction comprising central axis
The mode of P is mutually eccentric, these space forming portions with no regularity (randomly) can be set side by side in the axial direction.By
This, can play the effect roughly the same with the deceleration mechanism 4 of first embodiment.
In addition to this, although disclosing optimum structure for carrying out the present invention, method etc. in above record, this
It's not limited to that for invention.That is, the present invention has mainly carried out special diagram to specific embodiment, and it is illustrated,
But those skilled in the art can be in the range of not departing from technical concept and purpose range of the invention, for the above
Embodiment shape, material, quantity, it is other constitute in detail in additional various modifications.Therefore, to shape disclosed above
The record that shape, material etc. are defined is the illustrative record carried out for the ease of being understood the present invention, is not used
In limiting the present invention, therefore, carried out with a part of component name for limiting or all limiting beyond above-mentioned shape, material etc.
Record be also included in the present invention.
Description of symbols
1,10 fire arrester with deceleration mechanism
2 pipings
3 fire arresters
4,104 deceleration mechanism
15,15 ', 15 ", 105 orifice elements (component)
5B, 5C normal surface (non-parallel face)
The downstream side normal surface (non-parallel face) of 42C throttle orifice partition
5E, 5E ', 105F through portion
50A, 350A first segment discharge orifice space (the first interconnecting part)
150, a through hole more than 250,350
The the second throttle orifice space 150B, 250B, 350B (the second interconnecting part)
P central axis
T penetrates through region
Claims (7)
1. a kind of deceleration mechanism, is set in the piping that flammable fluid is flowed through, and is set to for in the piping
At least side in the axial direction of the piping for the fire arrester that the flame of propagation is put out a fire, for make to propagate in the piping
Flame transmission speed reduction, the deceleration mechanism be characterized in that,
The deceleration mechanism is configured to be connected in the axial direction of the piping,
The inner surface of the deceleration mechanism has the multiple and not parallel non-parallel face of axis,
Multiple non-parallel faces are arranged in side by side in the axial direction,
The deceleration mechanism alternately has in coconnected first interconnecting part of axial direction of the piping and the second interconnecting part,
First interconnecting part is made of an opening,
Second interconnecting part is formed through there are multiple through holes in the perforation region narrower than the opening.
2. deceleration mechanism according to claim 1, which is characterized in that
In the range of the aperture opening ratio of the multiple through hole in the perforation region is 20%~60%.
3. deceleration mechanism according to claim 2, which is characterized in that
Each through hole becomes the circle that internal diameter is 1mm~10mm under vertical view or equivalent circle diameter is 1mm~10mm's
Polygon, ellipse or irregular shape.
4. deceleration mechanism described in any one of claim 1 to 3, which is characterized in that
In multiple non-parallel faces, the angle difference of the non-parallel face and the axis is roughly equal.
5. deceleration mechanism according to claim 4, which is characterized in that
Substantially 90 degree of angle of the non-parallel face and the axis.
6. a kind of fire arrester of band deceleration mechanism, which is characterized in that have:
Deceleration mechanism according to any one of claims 1 to 5；And
The fire arrester for putting out a fire to the flame propagated in the piping.
7. the fire arrester of band deceleration according to claim 6 mechanism, which is characterized in that
The deceleration mechanism is set to the two sides in the axial direction of the piping of the fire arrester.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JPPCT/JP2016/082143 | 2016-10-28 | ||
| PCT/JP2016/082143 WO2018078814A1 (en) | 2016-10-28 | 2016-10-28 | Speed reduction mechanism and flame arrester provided with speed reduction mechanism |
| PCT/JP2017/039007 WO2018079749A1 (en) | 2016-10-28 | 2017-10-27 | Speed reduction mechanism and flame arrester provided with speed reduction mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109937327A true CN109937327A (en) | 2019-06-25 |
| CN109937327B CN109937327B (en) | 2021-07-27 |
Family
ID=62023677
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680090449.9A Active CN109952471B (en) | 2016-10-28 | 2016-10-28 | Speed reduction mechanism and flame arrester with speed reduction mechanism |
| CN201780066770.8A Active CN110050158B (en) | 2016-10-28 | 2017-10-27 | Speed reduction mechanism and flame arrester with speed reduction mechanism |
| CN201780066865.XA Active CN109937327B (en) | 2016-10-28 | 2017-10-27 | Speed reduction mechanism and flame arrester with speed reduction mechanism |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680090449.9A Active CN109952471B (en) | 2016-10-28 | 2016-10-28 | Speed reduction mechanism and flame arrester with speed reduction mechanism |
| CN201780066770.8A Active CN110050158B (en) | 2016-10-28 | 2017-10-27 | Speed reduction mechanism and flame arrester with speed reduction mechanism |
Country Status (4)
| Country | Link |
|---|---|
| JP (3) | JP6811464B2 (en) |
| KR (3) | KR102571832B1 (en) |
| CN (3) | CN109952471B (en) |
| WO (3) | WO2018078814A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023101925A1 (en) | 2023-01-26 | 2024-08-01 | Man Energy Solutions Se | Tube bundle reactor |
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- 2016-10-28 WO PCT/JP2016/082143 patent/WO2018078814A1/en active Application Filing
- 2016-10-28 CN CN201680090449.9A patent/CN109952471B/en active Active
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- 2017-10-27 KR KR1020197011533A patent/KR102389545B1/en active IP Right Grant
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- 2017-10-27 JP JP2018547807A patent/JP7117717B2/en active Active
- 2017-10-27 JP JP2018547806A patent/JP6980197B2/en active Active
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- 2017-10-27 WO PCT/JP2017/039007 patent/WO2018079749A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6811464B2 (en) | 2021-01-13 |
| JP6980197B2 (en) | 2021-12-15 |
| JPWO2018078814A1 (en) | 2019-09-05 |
| CN110050158A (en) | 2019-07-23 |
| CN110050158B (en) | 2021-07-27 |
| KR20190100163A (en) | 2019-08-28 |
| WO2018079750A1 (en) | 2018-05-03 |
| KR102389545B1 (en) | 2022-04-21 |
| CN109952471A (en) | 2019-06-28 |
| JPWO2018079749A1 (en) | 2019-09-19 |
| KR20190100164A (en) | 2019-08-28 |
| WO2018079749A1 (en) | 2018-05-03 |
| WO2018078814A1 (en) | 2018-05-03 |
| JP7117717B2 (en) | 2022-08-15 |
| JPWO2018079750A1 (en) | 2019-09-19 |
| KR102571832B1 (en) | 2023-08-28 |
| CN109937327B (en) | 2021-07-27 |
| KR20190100165A (en) | 2019-08-28 |
| CN109952471B (en) | 2021-05-14 |
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