CN103803210A - Exhaust valve of container - Google Patents

Abstract

The invention discloses an exhaust valve of a container. The exhaust valve is suitable for fixation on an opening on the container. The invention further provides a butterfly valve which is configured for allowing fluid inflow into the container or fluid outflow out of the container when a pressure difference between the inner pressure of the container and an environment pressure out of the container exceeds a preset value. The invention further discloses the container with the exhaust valve.

Description

The blow off valve of freight container

Technical field

The present invention relates to the blow off valve of freight container.Blow off valve of the present invention is developed out particularly for for bulk goods shipping container, (be particularly intended for use the freight container in ocean freight, it is commonly referred to as " shipping container ") and will be described with particular reference to this application.But, should understand, blow off valve of the present invention can be combined with various types of containers or other enclosure spaces, wherein must guarantee that the pressure reduction between container or shell inside and outside is no more than predetermined value.In the time using in this application, term " freight container " comprises all this containers or shell.

Background technology

The use amount of shipping container is very large: in given arbitrary day, estimates at 1,000,000 this freight containers of about 5-6 in the whole world and uses, and stable increasing of the quantity using.

Freight container be cuboid and generally manufacture with one of two kinds of standard sizes: 6 meters long or 12 meters long.Width is typically standardized as 2.4 meters and be highly 2.6 meters.Typically, freight container is provided with watertight door in its one end, and be made up of ribbed metal sheet the side of freight container, but some refrigerated container has smooth surface.It is airtight that container designs becomes, in being arranged on freight container upper wall to prevent because the variation of environmental air pressure causes the excessive or hypotensive air extractor vent of freight container pressure.

Because freight container can be flushed to outboard or lose when the shipwreck in stormy weather, so freight container is lost in water at sea more frequently.Freight container is lost by this way conventionally and can not be in the news, and therefore can not obtain the accurate estimation for large marine container quantity of losing, but anecdotal evidence implies the much bigger of this quantity ratio report.

Only be flushed to the harm that freight container on seabeach or that sink to seabed produces smaller, freight container is equipped with except the situation of toxic material certainly.But, suspect that freight container that is floating or partially submerged or just submergence (just the meaning of submergence is floating below the water surface) has caused quite a large amount of infringements: can not get precise number, but there are some little/medium-sized ships bumping against confirmed report missing after freight container, and believe that many it is said damage or in fact the less ship that sinks is not damaged (whale has sonar after all) but because the freight container that bumps against just submergence damages by whale owing to hitting " whale ".

As can be seen from the above,, in the situation that having some restrictions, the freight container of loss sinks to such an extent that The faster the better.But; freight container must be protected goods wherein; thereby use full open aperture; it is infeasible in all sides and bottom, having the freight container of air extractor vent: if freight container is lost in water; the structure of the type means that freight container sinks rapidly certainly; but it also can allow that splash water and bilge water easily enter freight container, causes filled cargo damage.

At present, standard container is furnished with one or more air extractor vents of forever opening near container top or top, to prevent causing freight container to damage because the pressure between internal container and ambient pressure is unbalanced.

Freight container fills unreactable gas conventionally with protection content, or fills fumigating gas.But in the case of having the top air extractor vent of forever opening, the gas in freight container spills from air extractor vent gradually, has limited the effect of those gases.

Common way is to gather gaseous sample from internal container, to detect the trace gas being sent by material (as illegal drug and explosive).At present, conventionally gather gaseous sample by promoting sampling probe through door seal; This damages rapidly door seal, and the replacing of door seal is expensive.

Invention target

Thereby the blow off valve of a kind of shipping container of needs, it is keeping freight container substantially airtight under normal operating conditions, and does not allow that splash water or bilge water enter easily, if but freight container be lost in water, its admissible set vanning sinking, and allow the gas in easily sampling set vanning.

Further target (it is applicable to shipping container and other freight containers) is that the change of environment inside containers is minimized, thereby the presence of any stifling chemicals using in freight container (therefore its effect) is maximized.This trends towards the quantity of effectively stifling required this chemicals to minimize.Further target is that the pest activity of turnover freight container is minimized.

Summary of the invention

The invention provides a kind of blow off valve that is suitable for freight container, described blow off valve is suitable for being fixed on above the aperture on freight container, and provide clack valve, clack valve to be arranged to only in the time that the pressure reduction between the ambient pressure outside internal container pressure and freight container exceedes predetermined value, allow that fluid flows into or outflow freight container.

Preferably, blow off valve also comprises a pair of blow off valve separating that is suitable for freight container, described blow off valve is suitable for being fixed on above the aperture on freight container, and provide clack valve, clack valve to be arranged to only in the time that the pressure reduction between the ambient pressure outside internal container pressure and freight container exceedes predetermined value, allow that fluid flows into or outflow freight container.

Also preferably, described valve also comprises the lid of perforation.

Preferably, blow off valve comprises flap, and flap provides two lobe parts; A lobe part is suitable for bending to allow that in the time that described pressure reduction exceedes described predetermined value fluid flows into freight container; Another lobe part is suitable for bending to allow that in the time that described pressure reduction exceedes described predetermined value fluid flows out freight container.

The present invention also provides a kind of freight container, and the bottom that its top with neighbor set as above vanning is arranged on first row air valve on side of freight container and neighbor set vanning is arranged on blow off valve described in second on the opposite flank of freight container.

Accompanying drawing explanation

Only in an exemplary fashion, preferred embodiments of the present invention will be described in detail with reference to the annexed drawings, wherein:

Fig. 1 is the sketch being provided with according to the freight container of the blow off valve of first embodiment of the invention;

Fig. 2 is through according to the cross-sectional plane of the blow off valve of first embodiment of the invention;

Fig. 3 is the planar view of the constituent elements of valve;

Fig. 4 is the diagram being provided with according to the upper and lower of the freight container of the valve of first embodiment of the invention, and wherein said valve is in operation;

Fig. 5 is through according to the cross-sectional plane of the blow off valve of second embodiment of the invention;

Fig. 6 is the planar view of valve plate;

Fig. 7 is the section on the line A-A of Fig. 6;

Fig. 8 is the planar view of flap;

Fig. 9 is the lateral plan of flap; With

Figure 10 is the planar view of lid.

The specific embodiment

With reference to Fig. 1-4 in accompanying drawing, shipping container 10 is formed with traditional ribbed metal side 11,12, and is arranged on the relative side of freight container according to two of the first embodiment blows off valve 13,14.Blow off valve 13 is arranged between the rib at 11 one end places, side, the top 15 of neighbor set vanning; Second row air valve 14 is arranged on relative side 12, between the rib of this side, and the bottom 16 of neighbor set vanning, and be positioned at that end relative with valve 13 of side 12, thus make valve 13,14 roughly diagonally toward each other.

Freight container can be provided with extra valve certainly, but believe that two valves are just enough, if they are arranged as mentioned above, because by this configuration, no matter freight container in which kind of mode falls, bottom downwards or top downward, in valve one will be under water and valve face on the water at least at first.Should be noted that freight container is conventionally floating in the downward mode in bottom, because due to the characteristic of freight container Assembly, normally bottom is heavy for they.

Fig. 2 represents the configuration of blow off valve 13,14, and they are structurally identical.In all cases, valve is all fixed on above the cut portion 17 being formed in freight container side 11,12.By form cut portion between adjacent rib, valve is protected by the protrusion of rib.But if necessary, it is also possible that valve is placed on to other places.

Each valve 13,14 has outside lid 18, and lid 18 is installed with a large amount of hole 19, and air or water can enter or leave valve by hole 19.The cross-sectional plane of lid is most solemn of ceremonies hat.

Two same valve plates that separate are installed between lid and aperture 17: overhead-valve plate 20 and bottom valve plate 21, flap 22 is arranged between these valve plates.

As shown in Figure 3, bottom valve plate 21 on planar view, be rectangle and peripheral frame 21a is provided.Centre hole 24 is formed in bottom valve plate, to receive fixing rivet 25.Valve plate 21 is also formed with two apertures that separate 26,27; 26Bi aperture 27, aperture is wide, and width is chosen to make one end of flap 22 can pass through aperture 26, but aperture 27 can not be passed through in the opposite end of flap.

Overhead-valve plate 20 is identical with bottom valve plate 21, but oppositely uses (seeing Fig. 2) so that the wider aperture 29 in overhead-valve plate is overlayed on above the narrower aperture 27 in bottom valve plate, and the narrower aperture 30 in overhead-valve plate overlays on above the larger aperture 26 in bottom valve plate.

Overhead-valve plate 20 is also formed with the 21b of rim portion and receives the centre hole 28 of rivet 25.

Flap 22 is formed with centre hole 35 to receive fixing rivet 25.Except two projections 31 on 35 both sides, hole, flap 22 is rectangle on planar view.In the time of assembled valve parts as illustrated in fig. 2, flap 22 is maintained between overhead-valve plate and bottom valve plate 20,21.Flap 22 is made up of harder but pliable and tough material, for example high density polyurethane, and can be bending when suffer pressure on a side of flap or opposite side time.

As shown in Figure 2, the Part I 32 of flap lays respectively between the aperture 29 and 27 of overhead-valve plate and bottom valve plate.The size in the aperture 29 in overhead-valve plate makes the part 32 of flap 22 can pass through aperture 29, but can not pass through aperture 27.Thereby part 32 can be bending to allow that fluid leaves freight container by the perforation 19 in lid under pressure, but do not allow that fluid passes through along contrary direction, because flap 32 is supported by bottom valve plate and can not pass through aperture 27.

On the contrary, the part 33 of flap can be bending with by the aperture 26 in bottom valve plate, to allow that fluid enters freight container, but supported by overhead-valve plate in the time of pressurized in opposite direction, because it can not be by the aperture 30 in overhead-valve plate.

Assemble in the following way above-mentioned parts: go up valve plate and lower valve plate and flap 22 is clipped between them with rivet 25 is fixing, as shown in Figure 2, and by gluing or other modes the 21a/b of rim portion is attached to the inwall of lid and the upper valve plate, lower valve plate and the flap that assemble are attached to lid 18 (Fig. 2).Then by the fastener of a succession of rivet separating 36 or equivalence, whole assembly is fixed on above aperture 17.But another kind of possibility is the single parts together with upper valve plate, lower valve plate are fabricated to permanent set with flap.

With reference to Fig. 5-10 in accompanying drawing, comprise the flap 51 and the lid 54 that are arranged between overhead-valve plate and bottom valve plate 52,53 according to the blow off valve 50 of second embodiment of the invention.

As shown in Figure 6, each valve plate 52,53 on planar view, be rectangle and be formed with two apertures that separate 56,57; 56Bi aperture 57, aperture is wide, and width is chosen to make a part of flap 51 can pass through aperture 56, but the relative part of flap can not be passed through aperture 57.

Each valve plate 52,53 is formed with two pairs of projections that separate 58,59, on each longer sides of plate, have a pair of, between aperture 56,57 center.Projection 58,59 planes from each valve plate are protruded and serve as the locating convex block for locating flap 51, as described hereinafter.

Each valve plate 52,53 is formed with peripheral rim portion 60,61, and it protrudes into the plane top of corresponding valve plate and for separate two valve plates in the time that two valve plates are relative, as described below.

Two valve plates the 52, the 53rd, identical, but oppositely use, as shown in Figure 5, thereby the wider aperture 56 in upper plate 52 is overlayed on above the narrower aperture 57 in lower plate 53, the narrower aperture 57 in upper plate 52 overlays on above the wider aperture 56 in lower plate 53.

Figure 8 illustrates the planar view of flap 51, flap 51 is made up of the thin slice that the material by harder but pliable and tough of rectangle is made substantially, it provides two lobe part 51a and 51b, bending when each lobe part can be under pressure on a side of lobe or opposite side.Flap 51 is provided with a pair of integrally formed protruding 62,63, on the each long limit of flap each one.Each protruding outward flange of 62,63 is fixed in square, thereby makes the projection 62,63 can be firmly and exactly between two pairs of projections 58,59 of valve plate 52,53.

For assembled valve, flap 51 is clipped between relative valve plate 52,53, valve plate 52,53 is reverse as mentioned above, thereby makes an aperture 57 in valve plate relative with 56 positions, aperture in another valve plate.By the projection in flap 62,63 being bonded between relative two pairs of projections 58,59 of relative valve plate, locate exactly flap 51.The rim portion 60 of valve plate 52 contacts the rim portion 61 of valve plate 53, and valve plate is separated to hold flap 51.By valve plate/flap assembly being fixed together by glued together the mating surfaces of rim portion 60,61.

As shown in Figure 5, the length x of flap 51 is shorter than the length Y of valve plate, thereby makes in the time that flap 51 is as described above between valve plate, and the end of lobe part 51a/b overlays on adjacent aperture 57 above but the end in the adjacent aperture 56 of position out of reach stopping.

As can be seen from the above,, if enough pressure is applied to lobe part 51a in the direction of arrow A, this lobe part can be bending away from applied pressure and by adjacent aperture 56, allows that fluid passes through valve.Similarly, if enough pressure is applied to lobe part 51b in the direction of arrow B, lobe part 51b can be bending away from applied pressure and by adjacent aperture 56.

Above-mentioned valve plate/flap sandwich structure is arranged in protection lid 54, as shown in Fig. 5 and 10.Lid 54 provides flat, firm protection outside face 71, the end 72,73 of inclination, and be formed with the integrally formed mounting flange 74 of mounting hole 75.Thereby end 73 is perforated and makes fluid enter or to leave valve by lid.

As shown in Figure 5, the inside of lid is formed with the step 76 around inwall; The internal dimensions of lid is pushed into valve plate/flap sandwich structure to be coupled in lid inside.The thickness of valve plate/flap sandwich structure is identical with the distance Z between step 76 and the outside face of mounting flange 74, so that proper valve plate/flap sandwich structure is located as illustrated in fig. 5 and lid 54 is fixed on aperture in freight container 77 above time, valve is securely held on the wall of freight container.

By by suitable fastener (as rivet) through fixed orifice 75 and insert lower floor's wall of freight container, valve is fixed to freight container.If valve may impact any application on valve gap for rainwater, splash fluid or other undesirable fluids, the position of sidepiece 73 that valve is mounted to perforation is minimum, thereby makes the tilted shape of lid prevent that any water level from going up and making shipwreck to enter perforation in perforation.

Freight container can be provided with any amount of blow off valve by any position range thereon.If need blow off valve to help freight container to sink in the time that it falls into the water, should locate as described in reference to Figure 1 blow off valve.If there is no this requirement, valve can be arranged near the top of freight container, if preferably talked about.

Lid, overhead-valve plate and bottom valve plate can be made up of any suitable high impact material, for example polycarbonate.Should understand, above-mentioned structure be manufacture comparatively cheap, thereby marked down the valve of changing damage.In addition, valve is fixed on to method above aperture simple, so be easy to change.

The operation of above-mentioned valve is shown in Figure 4: valve 13,14 automatic operations are to regulate any pressure unbalanced.If the pressure in freight container exceedes external pressure (no matter hydraulic pressure or air pressure), valve will be opened as shown in the valve 13 in Fig. 4, allow that fluid (arrow A) is by valve, because 32 bendings of the part of flap are away from valve plate and by the aperture in upper valve plate.On the contrary, if external pressure is greater than the pressure in freight container, the part 33 of flap is bending as shown in the valve 14 in Fig. 4, allows that fluid (arrow B) enters freight container.

Should understand, make valve operate required amount of differential pressure and determined by the rigidity of flap, fluid can be determined by the size in the aperture in overhead-valve plate and bottom valve plate by the speed of valve.Thereby, following is fairly simple thing: select valve plate rigidity in the valve 14 of bottom to make to be for example not enough to open valve by the wave spray or bilge water applied pressure, if but when freight container is lost in water and the hydraulic pressure of freight container outside exceedes predetermined value valve can open.

If freight container is lost in water, it generally can be floating in the minimum mode of container base, once the flexibility of flap makes freight container in marine, the valve 14 of bottom is just opened, and allows that water enters freight container.This certainly can increase the air pressure in freight container and soon afterwards, the valve 13 on top opens to allow that air leaves freight container, as shown in the arrow A in Fig. 4.

Be lost in the many situations in water at freight container, can find out the position that freight container is overboard with rational accuracy, if freight container sinks rapidly,, in the time must giving freight container for change, this is convenient to determine the position of freight container.Obviously, the speed of the actual sinking of freight container depends on that the weight of freight container adds the weight of Loaded goods in freight container, if but know that freight container adds the general weight of Loaded goods, and can calculate the time that sinking may spend, the cross-sectional area of supposing valve is also known.The calculating that empty container is carried out shows that 6 meters of empty freight containers probably spend more most sinking in 3 hours, and 12 meters of freight containers are spent more sinking in 7 hours most.If thereby the ocean current of freight container water-drop point is known, can calculate the drift value of freight container before sinking.

As previous explanation, because valve diagonal angle layout relative to one another, so even if freight container overturning is arrived marine so that its is inverted, valve is still operation as described above also, the valve that the valve valve 14 that is bottom except valve 13 is top.

As mentioned above, standard container is provided with the freight container damage of top air extractor vent to prevent from causing because the pressure between internal container and ambient pressure is unbalanced at present.In the time will valve according to the present invention being installed to freight container, without the air extractor vent of installation code because valve will automatic operation to regulate any pressure imbalance.But, the freight container of the top air extractor vent of forever not opening provides extra advantage: common way is to fill freight container with unreactable gas or for the gas of stifling object, but for traditional freight container, fumigating gas spills from the top air extractor vent of opening, thereby only part is effective.On the contrary, by the present invention, blow off valve can be retained in fumigating gas in freight container, unless there is obvious pressure imbalance between freight container and ambient pressure, in this case, valve will only open the sufficiently long time to allow this pressure imbalance of adjusting and then will again cut out.This has fully increased the reservation of fumigating gas and stifling effect.

In addition, above-mentioned blow off valve provides improved mechanical barrier for the pest species (insect, rodent, fungi) that enters freight container.

Can expect that blow off valve of the present invention also makes the illegal substances of carrying in detected set vanning be more prone to, because it makes freight container less by the ventilation of the air extractor vent forever opened, so the air in freight container trends towards retaining the trace gas being sent by material (as illegal drug and explosive).By pumping into air via a valve and the air of discharging from another valve being sampled, easily sampling set vanning air, makes to detect these Illicit Drugs and is more prone to, and needn't actually open freight container.Alternatively, can pump simply air by a valve, and sample.

Preferably, blow off valve of the present invention manufactures with the top air extractor vent of the standard of current use measure-alike: this is convenient to existing freight container and reequips blow off valve of the present invention.

Claims (9)

1. one kind is suitable for the blow off valve of freight container, described blow off valve is suitable for being fixed on above the aperture on freight container, and provide clack valve, described clack valve are arranged to only in the time that the pressure reduction between the ambient pressure outside pressure and the freight container of internal container exceedes predetermined value, allow fluid inflow or flow out described freight container.

2. blow off valve as claimed in claim 1, wherein said valve comprises flap, described flap provides two lobe parts; A lobe part is suitable for bending to allow that in the time that described pressure reduction exceedes described predetermined value fluid flows into freight container; Another lobe part is suitable for bending to allow that in the time that described pressure reduction exceedes described predetermined value fluid flows out freight container.

3. blow off valve as claimed in claim 2, wherein said valve also comprises a pair of valve plate separating being arranged on flap both sides; Each described valve plate provides the first aperture and the second aperture that separate; Described the first aperture there is proper ratio and size in case the adjacent lobe part of allowing flap by wherein, described the second aperture there is proper ratio and size in case the adjacent lobe part of not allowing flap by wherein; The first aperture in described valve plate one of the lobe part that wherein said valve plate and described flap are arranged so that described flap and described in another between the second aperture on valve plate, and the second aperture in described valve plate described one of lobe part and described described in another between the first aperture on valve plate described in another of described flap.

4. blow off valve as claimed in claim 3, wherein each described valve plate is formed with peripheral rim portion described valve plate is separated and described flap is contained between described valve plate.

5. blow off valve as claimed in claim 4, wherein each described valve plate is also formed with the locating convex block for locating described flap.

6. blow off valve as claimed in claim 1, wherein said valve also comprises the lid of perforation.

7. blow off valve as claimed in claim 6, wherein said lid is formed with top section and with respect to the tilt sidepiece part of an angle of described top section, and described at least one, in sidepiece part, forms perforation.

8. blow off valve as claimed in claim 6, wherein said lid is provided with peripheral rim portion so that described valve is fixed on above the aperture in described freight container.

9. a freight container, it has as first row air valve in any one of the preceding claims wherein and second row air valve, the top of described first row air valve neighbor set vanning is arranged on a side of freight container, and the bottom of described second row air valve neighbor set vanning is arranged on the opposite flank of freight container.

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