CN201023896Y - Refrigerated container back plane for modifying T floor combined welding seam position - Google Patents

Abstract

The utility model discloses a modified T floor combined welding seam location refrigerated container bottom board, which pertains to the technical field of the components of the refrigerated containers. The modified T floor combined welding seam location refrigerated container bottom board includes a T floor, a thermal insulation layer and a wave-shaped bottom board, the thermal insulation layer is arranged between the T floor and the wave-shaped bottom board, the T floor is welded by a plurality of T-shaped groove elements, the welding seams of the T-shaped groove elements are positioned in the range of 180mm to 305mm from the central line of the bottom board and the position which is out of 713mm from the central line of the bottom board. The location design of the welding seams of the T floor of the utility model can avoid the wheelmark region by wheel rolling during the common driving when the fork lift trucks unload the goods in the refrigerated containers as far as possible, at the same time, the utility model can effectively avoid the biggest elastic deformation region which is formed by the pressure of the goods on the bottom board, reduce the pressure which is exerted on the welding seams, improve the whole rigidity of the whole bottom board, increase the bearing capacity of the refrigerated containers, reduce the probability of the weld cracking and allow the bottom board to be more solid and durable.

Description

The refrigerated container bottom board of improvement composite welds position, T floor

Technical field

The utility model relates to the assembly of refrigerated container, relates in particular to the refrigerated container bottom board of composite welds position, a kind of T of improvement floor.

Background technology

Refrigerated container is a kind of freight container that has the international standarkdization of refrigerating plant, and the intensity of its project organization will be followed ISOStandard 1496 standards.Refrigerated container is applied to the transportation of the perishable goods in ocean or land route, the structure of this container bottom board as shown in Figure 1, it comprises T floor 5, heat-insulation layer 6, waveshape floor plate 7, bottom side beams 8, T floor 5 and be welded on the bottom side beams 8 with the both sides of the waveshape floor plate 7 of gaining in strength, after T floor 5 and waveshape floor plate 7 both middle foaming machine injecting frothing materials by a kind of special use make it finish chemical reaction, generated polyurethane foam body heat-insulation layer 6, thereby in conjunction with forming the bottom construction that can bear the refrigerated container of big load.

The T floor upper surface is provided with a plurality of type of T longitudinally grooves, and it is to be formed by the aluminium section bar extruding, because the container bottom board area is big and the restriction of existing processes level, the T floor can not be made by an aluminium section bar, generally is to be combined by several T type groove member welding.

The weight of the maximum bearing goods that allows during the refrigerated container full and down of international standarkdization is as 20ft (foot), 40ft, 40ft.Hc according to different length dimensions.The T type groove on the T floor of the refrigerated container that global at present deep freezer manufacturer is produced, because whole deep freezer industry production ground shifts, the transfer of supplier, the commercial efficiency aspect also makes and all tends to normalisation in width dimensions, the height dimension on T floor, the aspects such as quantity of T type groove.

The design of the T floor of 20ft deep freezer as shown in Figure 1, it is combined by 51 welding of 7 T slot members, adopts 6 weld seams 52 to weld, the position distribution of weld seam 52 as shown in the figure, the position of weld seam 52 almost is to be evenly distributed on the T floor.

The design of the T floor of 40ft, 40FT.HC deep freezer as shown in Figure 2, it is combined by 51 welding of 9 T slot members, adopts 8 weld seams 52 to weld, the position distribution of weld seam 52 as shown in the figure, the position of weld seam 52 also almost is to be evenly distributed on the T floor.

The T floor of refrigerated container below it warm material make by low-density expanded material, when the truck wheels spreading is on the T floor, the T floor produces serious sagging phenomenon at the centre-of-pressure position of tire, if because the zone of produce sinking in fork truck handling goods hour wheel spreading power center is just in the zone of welded seam, that will produce a kind of more serious deformation, and the long-term use meeting causes the welded seam cracking.The center deflection on T floor was maximum when deep freezer was completely freighted thing in addition, and the center in the whole seeervice cycle case of refrigerated container is to use between the most frequent operating area.This is interval because under the action of gravity at cargo load center.Bigger elastic deformation amount produces very adverse influence to welded seam, moreover aluminum alloy welding welding seam intensity is lower, the weld penetration that may occur in welding fragility that aluminum alloy weld seam zone produces and the production process is bad all to have brought excessive risk to T floor welded seam quality, the position that the weld seam on T floor is in the moderate finite deformation amount for a long time can produce weld metal fatigue quickly, until cracking, the design hidden danger that this interval welded seam lies dormant bigger.The design of refrigerated container T floor present welded seam combination to product design potential high risk.In addition in the molten bath of welded seam, the element of aluminum alloy such as Mg etc. are evaporated in welding process easily, scaling loss, thereby changed the aluminum alloy component of weld seam, cause aluminum alloy joint intensity lower, the weld penetration that may occur in welding fragility that aluminum alloy weld seam zone produces and the production process is bad all to have brought excessive risk to T floor welded seam quality.

Because the cracking of welded seam, condensed water constantly infiltrates in the foaming body, since temperature constantly change ponding frozen, after freezing again the variation dissolving along with temperature build-up change into water, such period of change is circulation repeatedly constantly, under the volume change of ice water circulation, the foam organizational structure of the closed pore of warm material constantly suffers damage, in use quicken impaired under the action of gravity of goods especially, make ponding more and more, the phenomenon that makes heat-insulation layer separate constantly enlarges, and finally makes refrigerated container lose service function.Welding region all exists the reason of bigger stress or cleanliness level deficiency all can influence the cementation power of adhesive agent in addition.Make deep freezer after using certain hour, occur the phenomenon of weld cracking and heat-insulation layer separation easily.

The utility model content

The utility model purpose provides the modified form refrigerated container bottom board that a kind of integral rigidity height, load-carrying capacity are big, reduce the weld cracking probability.

For solving the problems of the technologies described above, the refrigerated container bottom board of improvement of the present utility model composite welds position, T floor comprises the T floor, heat-insulation layer, waveshape floor plate, described heat-insulation layer is located between T floor and the waveshape floor plate, described T floor is welded by a plurality of T type groove members, and the weld seam of described T type groove member 11 welding is positioned at apart from base plate center line 180mm～305mm interval and the position outer apart from base plate center line 713mm.

The Position Design of deep freezer T of the present utility model floor welded seam is avoided fork truck as much as possible and adorn the wheelmark zone that the wheel that usually travels when driving goods is rolled in the refrigerated container case, avoided simultaneously the elastic deformation zone of goods self effectively to the maximum of the pressure formation of base plate, reduce the pressure that welded seam stands, improved the integral rigidity of whole base plate, increase the deep freezer load-carrying capacity, reduce the weld cracking probability, make base plate more sturdy and durable.

Description of drawings

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Fig. 1 is the structural representation of existing 20ft deep freezer base plate;

Fig. 2 is the structural representation of existing 40ft.40FT.HC deep freezer base plate;

Fig. 3 is a structure specific embodiment one of the present utility model;

Fig. 4 is a structure specific embodiment two of the present utility model.

The specific embodiment

Consult Fig. 3 and shown in Figure 4, the refrigerated container bottom board of described improvement composite welds position, T floor comprises T floor 1, heat-insulation layer 2, waveshape floor plate 3, bottom side beams 4.T floor 1 and be welded on the bottom side beams 4 with the both sides of the waveshape floor plate 3 of gaining in strength, T floor 1 and waveshape floor plate 3 have generated polyurethane foam body heat-insulation layer 2 after the foaming machine injecting frothing materials by a kind of special use make it finish chemical reaction in the middle of both.Described T floor vertically is welded by a plurality of T type groove members 11, the weld seam 12 of described T type groove member 11 welding is positioned at apart from base plate center line 180mm～305mm interval and the position outer apart from base plate center line 713mm, and T type groove member 11 can be provided with its width and number according to the needs of weld seam 12 positions.

Refrigerated container bottom board shown in Figure 3 is the 20FT specification, and width is 2250mm, and the number of T type groove member 11 is 5, and the position of weld seam 12 is located at apart from base plate center line 180mm～305mm interval and the position outer apart from base plate center line 713mm.

Refrigerated container bottom board shown in Figure 4 is 40FT or 40FT.HC specification, width is 2248mm, the number of T type groove member 11 is 5, and the position of weld seam 12 is located at apart from base plate center line 180mm～305mm interval and the position outer apart from base plate center line 713mm.

T type groove member number of the present utility model does not limit, be few more good more in principle, the position while welding that only needs to guarantee each member is in apart from base plate center line 180mm～305mm interval and the position outer apart from base plate center line 713mm, just can reach the purpose of this utility model.

The interval design-calculated of the utility model position while welding is according to as follows:

According to the fork truck of existing various models in the world, usually the reference standard size that is used for the wheelspan of 1 ton-3.5 tons general fork truck of operation in the container is: the scope of 890mm-1025mm, according to wheelspan and other key element, setting in the interval is no weld metal zone.Avoid wheel spreading power central role of tire in the weakest having again on the welding fragility position while welding effectively when making in the fork truck inlet operation like this.

Case inside dimension according to existing deep freezer, the wheelmark that travels commonly used in the fork truck turnover case, find under most situations by field analysis, the operator of fork truck makes the deep freezer side plate impaired for avoiding, causing unnecessary economic loss, all is the symmetrical position of central authorities of travelling under the overwhelming majority's the situation when dress is driven goods in the fork truck inlet.Principle according to the mathematics probability distribution, setting fork truck all is certain rule to be arranged and travel certain wheelmark when lade, all be to drop in the interval of this setting under the center of pressure overwhelming majority's of its tire the situation, up to front end, the interval of the wheelmark of this fork truck tire is called by the door end: the fork truck wheel is rolled over the center pressure band.The interior T floor design of the utility model refrigerated container is gone up on the wheel rolling center pressure band of formulating the deep freezer fork truck wheelmark that travels commonly used and is the design of no weld metal zone.

The relevant data design of implementing the design's patent is as follows:

Tyre width: 200mm wheelspan scope: 890mm---1025mm usually usually

The fork truck wheel is rolled over center pressure band molded breadth:

200mm/2+(1025mm/2-890mm/2)+200mm/2

＝268mm

Being designed to not have the welded seam zone in wheel is rolled between the center pressure zone is the most rational design, and the utility model key points in design is the center of pressure district to the fork truck tire, and the wheelmark that promptly usually travels wheel is rolled in the center pressure band, does not design welded seam.Can reduce to maximum likelihood the potential risk of weld cracking.This design makes the service life of deep freezer further prolong effectively.Reduced maintenance cost widely.For the user brings interests.

Consider the deviation that forklift operator travels, on the size plinth basis of the theoretical Track width of wheel rolling center pressure band, increase margin of safety again, the utility model enlarges wheel rolling center pressure bandwidth size makes design more perfect, increase margin of safety and set no weld seam zone, wherein wheel is rolled over the 1/2 tyre width size that the margin of safety in the center pressure band outside is got wheelspan, wheel is rolled over the inboard of center pressure band and is selected for making things convenient for T ground slope central area design-calculated, dwindles margin of safety, and value is 40mm.Then the width of design wheel rolling center pressure band is:

200mm/2+200mm/2+(1025mm/2-890mm/2)+200mm/2+40mm

＝408mm

The wheel rolling center pressure bandwidth of setting one-sided wheel is about 408mm.

Wherein the edge in the wheel rolling center pressure band outside apart from the distance of T floor line of centers is:

1025mm/2+200mm/2+200mm/2＝713mm

By collecting the relevant fork truck manufacturer's in present various countries related standards, to be typically 890mm-1025mm be the normal data that can be used for the wheelspan of the most frequently used various model fork trucks of operation in the case at present to 1 ton to 3.5 tons fork truck wheelspan in the reality.Can represent most fork truck models that can be used for handling goods body in the container.What wheelspan was little generally is the fork truck of little tonnage.But consider to increase the scope of design of deep freezer central elastic deforming zone, for the welding quantity that reduces weld seam provides design condition, fork truck wheelspan according to the main use of operation in the present case is the 890mm-1025mm scope, the mathematical relation that applied probability distributes, consider the design factor of central T, the position that then one-sided wheel wheel is rolled over the center pressure bandwidth can be designed by the line of centers of refrigerated container case insied width and light the 305mm-713mm scope as gauge reference target, promptly is used for the one-sided width of rolling over the center pressure band: the W=713mm-305mm=408mm that takes turns of design-calculated reality.And the position that the wheel of bilateral wheel is rolled over the center pressure bandwidth is that the line of centers with deep freezer is that left-right symmetric distributes.

Refrigerated container for 20FT, 40FT, 40FT.HC, the design during according to refrigerated container T floor load the fork truck wheel roll over the relevant data of the weldless design patent in center pressure district, and consider the industrial capacity that to implement, elastic deformation area's width range that center, design construction refrigerated container T floor central authorities goods center of gravity causes: the maximum flexibility deforming zone that is set in the 360mm, and in this maximum flexibility deforming zone, adopt weldless design.

It is improper for the harm in service life of refrigerated container T floor that the utility model has solved the design of present welded seam, reduced the quality risk of welded seam on the T floor of refrigerated container, the influence of the factor of welded seam cracking drop to minimum may.The utility model has had correct science design method to the Position Design of welded seam, the further design of now passing through, use the quantity that reduces the T slot member, the structure that increases the width of each T slot member, more directly, more effectively reduced the quantity of welded seam.Drop to the harm and the risk of welded seam cracking minimum.

The utility model similarly is applicable to all goods transport equipment; as: insulation can; commercial truck; superimposed trailer; special container; as long as in fork truck that this patent is set forth wheel is rolled over the elastic deformation area's that center pressure band and central goods center of gravity cause range of sizes, not have the weld seam or the bonding seam of chemical combination that weld, all belong to protection domain of the present utility model.

Claims (1)

1. refrigerated container bottom board of improveing composite welds position, T floor, comprise T floor (1), heat-insulation layer (2), waveshape floor plate (3), described heat-insulation layer (2) is located between T floor (1) and the waveshape floor plate (3), described T floor (1) is welded by a plurality of T type groove members (11), it is characterized in that: the weld seam (12) of described T type groove member (11) welding is positioned at apart from base plate center line 180mm～305mm interval and the position outer apart from base plate center line 713mm.

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