CN1533489A

CN1533489A - Cryogenic fluid joint

Info

Publication number: CN1533489A
Application number: CNA038006316A
Authority: CN
Inventors: ��Լ��Ƥ��; 约翰·皮克特; 詹姆士·图尔伊
Original assignee: JC Carter Japan KK
Current assignee: JC Carter Japan KK
Priority date: 2002-05-07
Filing date: 2003-05-07
Publication date: 2004-09-29
Also published as: AU2003239380A1; JP2003322284A; JP3389241B1; TWM269386U; WO2003095883A1; KR20040105548A

Abstract

Provided is a cryogenic fluid coupling (30) in which coalescence of male (10) and female coupling (20) is maintained even when the cryogenic fluid coupling is used alone while solving ice and gas purging problems, and which has satisfactory workability and a wide scope of application. The cryogenic fluid coupling is used to supply of cryogenic fluid between a storage tank and a mobile unit. A coalescing lock mechanism (8), which maintains or releases the coalescence of the male coupling member (10) and the female coupling member (20) in association with the coalescing linkage mechanism (1), is provided.

Description

The cryogen coupling piece

Technical field

The present invention relates to a kind of cryogen coupling piece, be used between the jar of holding vessel and mobile device, supplying with cryogen, for example LNG Liquefied natural gas (LNG).

Background technique

Usually, cryogenic liquide such as LNG Liquefied natural gas (LNG) are supplied to the jar of mobile device such as tank trailer from the holding vessel that for example is located at the base in such a way.On base and mobile device, be provided with one respectively and drive/close valve.The base is provided with a loading arm, and this loading arm is positioned at from driving/close valve on the supply line that mobile device extends.It connects the end and has flange arrangement.Adpting flange can vertically and move horizontally and can reside in any position.The supply line end of mobile device also has flange arrangement.The adpting flange in base aligns with the flange of mobile device, and two flanges link together with bolt, and like this, the service of base and mobile device is connected to each other.Cryogen is supplied with by service.

It should be noted that when supplying with cryogen, being connected in a locking system of base and mobile device carried out, wherein not only need the connection of the service that is used to supply with but also need the connection of feedback pipeline, pass through feedback pipeline, in the receiving tank with the gas backstreaming of the cryogen equal quantities of supplying with in supplying tank, this is absolutely necessary.The connection of feedback pipeline has the structure similar to service.

The reason of the simple structure that adopts this existing pipeline connection below will be described, wherein be that LNG Liquefied natural gas is that example describes with the cryogen.LNG Liquefied natural gas temperature when liquid state is low to reach-162 ℃.When pipeline etc. contacted with air, airborne moisture was transformed into ice immediately, and these ice are then attached on the pipeline, and its influence is to adopt the fast quick-detach coupling piece that is generally used for common fluid, and the connection end of this coupling piece has a valve system.

Yet in connecting supplying method, each pipeline is driven/is closed valve from it and can contact with air inevitably to tie point.Thereby there is the oxygen mix that contains in rock gas and the air and the danger that sets off an explosion.In addition, be subjected to the pollution of exterior materials, after base and mobile device connect with its flange, according to the following discharge of carrying out rock gas for fear of supply.The ducted air that is present in out/closes between the valve is at first got rid of by nitrogen injection by force.When only having nitrogen in the pipeline, inject vaporized natural by force, like this, have only vaporized natural to occupy pipeline.Subsequently, open two and open/close valve supply LNG Liquefied natural gas.

When after supply, unclamping the pipeline connection, still need to carry out air scavenge, and be to carry out with opposite step.

In this case, when LNG Liquefied natural gas when holding vessel supplies to mobile device (tank trailer), by a plurality of supplies position being set, can improve the efficiency of supply to supply with a plurality of tank trailers.Because the rock gas discharging may cause the leakage of vaporized natural, rock gas is being supplied in the time of other tank trailer, comprise in the time of discharging rock gas, when just LNG Liquefied natural gas must supply in a plurality of tank trailers simultaneously, forbid the startup of tank trailer motor.

The discharge of rock gas also needs other being used to discharge the pipeline that is purged rock gas, entering atmosphere with the nitrogen that injects by force or the inside rock gas of vaporized natural same amount.Therefore, unnecessary rock gas must be discharged from the far chimney stack in distance natural gas supply station etc.And, according to requirement on environmental protection, the rock gas of this discharge is minimized.

The 5th, 429, No. 155 U. S. Patent has proposed a kind of cryogen coupling piece, and it has solved the problems referred to above in the cryogen supply.This kind cryogen coupling piece as shown in figure 19.

The cryogen coupling piece comprises that one is arranged on the recessed link on the mobile device, and the protruding link that is arranged on the base.Be arranged on engagement link mechanism in the protruding link and be used for engaging and protruding link and recessed link being matched, therefore, make cryogen between protruding link and recessed link supply and flow and become possibility.

Recessed link comprises a valve pipe and a butt joint valve element.Butt joint valve element with can before and after the mode of sliding be installed in the valve pipe, butt joint valve element is by the hermetic unit sealing of valve pipe, and is applied with bias voltage to keep sealing.Protruding link comprises outer tube, valve pipe and butt joint valve element.The mode of sliding before and after the valve Guan Yike is installed in the outer tube.The valve pipe is applied bias voltage so that make the valve pipe maintain the predetermined retracted position of relative outer tube.Butt joint valve element with can before and after the mode of sliding be installed in the valve pipe.Butt joint valve element seals by the hermetic unit of valve pipe, and has been applied in bias voltage to keep sealing.

In the cryogen coupling piece that obtains like this, engagement link mechanism is used for fixing and with the protruding link recessed link of packing into, the inner ring of the end of the valve pipe of recessed like this link and the outer tube of protruding link is adjacent.In this case, when engagement link mechanism uses lever the direction shown in the solid arrow is carried out attended operation easily in Figure 19, have only the relative outer tube of valve pipe, be coupled in the valve pipe of recessed link to front slide (direction shown in the solid line among Figure 19).In this case, the top of butt joint valve element and the top of concave, convex link advance mutually.In this case, have only the butt joint of working as valve just can make each the valve pipe withdrawal relatively of butt joint valve element to front slide.Therefore, the sealing by hermetic unit is disengaged, and like this, cryogen can be supplied with between recessed link and protruding link and flow.

In this case, can guarantee the fluid-tight between the valve pipe of each concave, convex link in the low temperature seal of the exterior top setting of the valve pipe of protruding link, the cryogen of Liu Donging can seepage thus.

In above-mentioned cryogen coupling piece, when the butt joint valve advanced mutually, the fluid-tight between the valve pipe of concave, convex link and the butt joint valve element was disengaged, and simultaneously, still keeps fluid-tight between the valve pipe.In this case, the valve pipe seal and with the space of external isolation be quite little and limited.Air in the space does not need special removal.Therefore required usually gaseous emission is optional.

The outer tube front of the valve pipe front of recessed link and protruding link valve pipe can be wiped the ice film off, and this ice film is influenced by cryogen and produces, when both in conjunction with the time and form, and attached to the surface of other link.And outer tube also is provided with ice and overflows window, and this overflows window can make the ice of wiping off spill into the outside, like this, can prevent to be subjected to the influence of cryogen and produces and have influence on the good of connector with the ice film that adheres to and be connected.

Yet the cryogen coupling piece allows between the pipeline for fluids and connects when being used between the feedback pipeline of unnecessary gas, and have can make two links adjacent one another are, in conjunction with and the structure that is moved away from each other.Be provided with the mechanism that keeps that is used to keep link connection joint between link, this mechanism is as independent parts (separating with link).

Therefore, suppose that service and feedback pipeline independently are positioned at diverse position, perhaps do not need feedback pipeline when supplying with cryogen.At this moment, if attempt to use separately the cryogen coupling piece, above-mentionedly keep lacking of mechanism and can cause connecting in conjunction with untenable situation.Therefore, need to improve the operation of link and the conveniency of widespread adoption inevitably.

Goal of the invention

The present invention is used to address the above problem.The purpose of this invention is to provide a kind of cryogen coupling piece, wherein when the cryogen coupling piece uses separately, joint protruding and recessed link also can be kept, and in the emission problem that solves ice and rock gas, can realize the application of easy manipulation and broad range.

Summary of the invention

A kind of cryogen coupling piece according to claim 1, be used between holding vessel and mobile device, transmitting cryogen, LNG Liquefied natural gas (LNG) for example, wherein, one protruding link comprises an engagement link mechanism, this mechanism has the Engagement Control bar, and this protruding link engages with conveyance fluid with a recessed link, and wherein the cryogen coupling piece comprises that engaging locking keeps mechanism; When protruding link matches by insertion with recessed link and Engagement Control bar when starting, the adapting device that is used for protruding link and recessed link starts, and can keep the joint of protruding link and recessed link like this.

According to this cryogen coupling piece, its convexity and recessed link engage to supply with fluid, are used to keep or unclamp joint that protruding and recessed link engages and lock and keep mechanism and constitute whole cryogen coupling piece with engagement link mechanism, comprise engagement link mechanism.Therefore, can use the cryogen coupling piece separately, solve the emission problem of ice and gas simultaneously.Enlarged the application area of coupling piece.After connecting and engaging, the operator can free, and need not keep an eye on coupling piece, and carries out other relevant work, therefore makes the raising of efficient become possibility.

Cryogen coupling piece according to claim 2, be used for delivering cryogenic fluid between holding vessel and mobile device, LNG Liquefied natural gas (LNG) for example, its convexity link engages with conveyance fluid with recessed link, its convexity link comprises an engagement link mechanism, this mechanism has one first butt joint valve element, its perisporium is provided with the raw material head piece, one valve pipe, be provided with the raw material mouth in the holding vessel side, be provided with valve port in recessed link side, wherein valve port is by being applied in the first butt joint valve element sealing of bias voltage all the time, one outer tube, hold the valve pipe, wherein the valve pipe is applied in bias voltage all the time in disengaged direction, an and Engagement Control bar, wherein handle the Engagement Control bar, can make the relative outer tube of valve pipe move to engagement positio, recessed link comprises one second butt joint valve element, its perisporium is provided with the raw material head piece, and a connecting tube, moves a jar side at it and is provided with the raw material mouth, be provided with valve port in its protruding link side, wherein, valve port is by being applied in the second butt joint valve closure of bias voltage all the time, and this cryogen coupling piece comprises that also one engages locking and keeps mechanism, wherein engaging locking keeps mechanism and comprises at least one lock pawl, it is articulated in the appropriate location of the outer tube outer wall of protruding link, and this lock pawl is applied in bias voltage at locking direction simultaneously, and the lock pipe is associated with the valve pipe, can outside outer tube, move forward and backward, and a locking groove, corresponding lock pawl is arranged on the position of connecting tube of recessed link, therefore, when the connecting tube of the recessed link of packing in the outer tube of protruding link, lock pawl locks by locking groove; Afterwards, when when direction of engagement is handled the Engagement Control bar, the valve pipe moves, make the first and second butt joint valves be adjacent to each other, whereby, the valve port of the connecting tube of the valve pipe of protruding link and recessed link is opened, thereby allowed the transmission cryogen, simultaneously, the lock pipe covers lock pawl to forbid unclamping this lock state.

In this cryogen coupling piece, the structure of the coupling piece that this ice that can supply with cryogen and not produced by cryogen is influenced has been done detailed description, and the structure that mechanism is kept in locking to the joint in this coupling piece structure has also been done detailed description.Particularly, this joint locking is kept mechanism and is had simple structure, wherein in protruding link, lock pawl is located at outer tube, and the mode that lock Guan Yiyu engagement link mechanism slides outside outer tube explicitly is provided with, and in recessed link, locking groove is arranged on connecting tube outer wall in front.Therefore, this joint locking too big cost keeping mechanism need not increase whole coupling piece as parts can be realized.

The cryogen coupling piece that also belongs to claim 2 according to the cryogen coupling piece of claim 3, wherein, the front inwall of the rear portion, the back side of lock pawl and lock pipe is provided with and unclamps the tapering, when the lock pipe is located at the rear end, unclamp the tapering and adjoin each other, lock pawl can move along the lockout direction like this.

In this cryogen coupling piece, only lock/unclamp by being arranged on unclamping the tapering and can realizing of lock pipe and lock pawl.Lock/unclamp also can combine and realize with engagement link mechanism.It is simple in structure and reduced cost.

Belong to any cryogen coupling pieces of

claim

2 or 3 according to the cryogen coupling piece of claim 4, wherein, protruding link and recessed link comprise the deicer that is used to wipe off the ice that cryogen produces; Deicer comprises the scraping ring that at least one is made of the outer tube front of protruding link, an ice overfall that is arranged on appropriate location on the outer tube, a scraping ring that is arranged on the valve pipe top of protruding link, and a scraping ring that constitutes by the connecting tube front of recessed link.

Belong to any cryogen coupling piece in the claim 2 to 4 according to the cryogen coupling piece of claim 5, wherein, the first butt joint valve of protruding link has the sealed department with recessed link adjacency, and the second butt joint valve element of recessed link has the sealed department with protruding link adjacency; Sealed department is replaceable.

In this cryogen coupling piece, the sealed department of the first butt joint valve element and the second butt joint valve element can be dismantled and change.Therefore, thereby being that most important parts also is the most often to be touched and to move the sealed department that wearing and tearing often take place when using coupling piece, is removable.Coupling piece can use continuously by changing this part, can not reduce sealability, makes the reduction of cost become possibility.

Description of drawings

Fig. 1 is a plan view, shows the profile according to cryogen coupling piece of the present invention.

Fig. 2 (a) is the stereogram of coupling piece profile shown in Figure 1, shows the preceding state of locking.

Fig. 2 (b) is the stereogram of coupling piece profile shown in Figure 1, shows lock state.

Fig. 3 is the plan view of Fig. 1 convexity link.

Fig. 4 is the longitudinal section along the XA-XA intercepting of the protruding link among Fig. 3.

Fig. 5 (a) is the valve pipe of pie graph 1 convexity link and the longitudinal section of the first butt joint valve element.

Fig. 5 (b) is the plan view of Fig. 5 (a).

The view of Fig. 5 (c) is used for the action of the relative valve pipe of the butt joint valve element of first in the interpretation maps 5 (a).

Fig. 6 (a) is the longitudinal section of the first butt joint valve element of Fig. 5 (a).

Fig. 6 (b) is its plan view.

Fig. 6 (c) is the stereogram of its profile.

The view of Fig. 7 (a) shows in detail the front portion of the outer tube among Fig. 1.

Fig. 7 (b) is its longitdinal cross-section diagram.

The view of Fig. 7 (c) shows in detail its rear portion.

Fig. 8 (a) is the cross-sectional view along the intercepting of the XB-XB among Fig. 5 (b).

Fig. 8 (b) is the longitudinal section along the XC-XC intercepting.

Fig. 8 (c) is a plan view.

Fig. 9 (a) is the plan view of the lock pawl among Fig. 1.

Fig. 9 (b) is the cross-sectional view along XD-XD intercepting among Fig. 9 (a).

Figure 10 (a) is the plan view of the lock pipe among Fig. 1.

Figure 10 (b) is the cross-sectional view along the intercepting of the XE-XE among Figure 10 (c).

Figure 10 (c) is its longitudinal section.

Figure 11 (a) is the plan view of connecting rod fixed tray among Fig. 1.

Figure 11 (b) is its side view.

Figure 12 (a) is the plan view of land among Fig. 1.

Figure 12 (b) is its side view.

Figure 13 is the longitudinal section of Fig. 1 concave link.

The plan view of the second butt joint valve among Figure 14 (a) Figure 13.

Figure 14 (b) is its longitudinal section.

Figure 14 (c) illustrates its profile.

Figure 15 (a) is the plan view of Figure 13 middle shell.

Figure 15 (b) is its longitudinal section.

Figure 16 schematic representation is used for the principle of the engagement link mechanism of interpretation maps 1 convexity link.

The view of Figure 17 (a) is used for the lockout state of interpretation maps 1 coupling piece.

Figure 17 (b) view is used for explaining the state of keeping that locks.

Figure 18 illustrates the typical total system that the cryogen coupling piece that uses among Fig. 1 is supplied with LNG Liquefied natural gas.

Figure 19 illustrates the cryogen connector of prior art.

Embodiment

The specific embodiment of the present invention describes as follows with reference to the accompanying drawings.

Fig. 1 is the plan view according to the profile of cryogen coupling piece of the present invention.

Cryogen coupling piece 30 comprises a protruding link 10, this protruding link is arranged on the holding vessel, for example on the holding vessel in the holding vessel in base or LNG Liquefied natural gas (LNG) supply station, an and recessed link 20, be arranged on mobile device, for example on the jar of tank trailer or LNG Liquefied natural gas powered vehicle.Cryogen coupling piece 30 is used for supplying with cryogen such as LNG between holding vessel and mobile device.

Protruding link 10 comprises an engagement link mechanism 1.This engagement link mechanism 1 comprises an Engagement Control bar 1d.Engagement Control bar 1d uses lever can carry out attended operation, this attended operation is kept state [0] and is kept state [6] along the locking that the real camber line of band arrow arrives the solid line indication before the locking shown in the double dot dash line chain from figure, whereby, two links engage to supply with fluid, need not get rid of gas or also can not be subjected to the influence of the ice film that cryogen produces.

Cryogen coupling piece 30 comprises that also one engages locking retaining mechanism 8, this mechanism keeps with engagement link mechanism 1 or unclamps the engaging (in Fig. 1 of protruding link 10 and recessed link 20, engage locking retaining mechanism 8 and comprise a lock pipe 2, along direction shown in the line of band arrow, move to the state shown in the solid line from the state shown in the double dot dash line with engagement link mechanism 1; And a lock pawl 3, under the control of lock pipe 2 grades, move in the lockout direction).

Except that above-mentioned engagement link mechanism 1, lock pipe 2 and lock pawl 3, protruding link 10 also comprises an outer tube 4 and a valve pipe 5.

Engagement link mechanism 1 comprises connecting rod fixed tray 1a, land 1b, connecting plate 1c, and above-mentioned Engagement Control bar 1d.Connecting rod fixed tray 1a is fixed on the immovable point A of back, the outside portion of outer tube 4.Connecting rod fixed tray 1a support engages controlling rod 1d is so that Engagement Control bar 1d can rotate around pivot B.Land 1b is fixed on the precalculated position of exposing from the rear portion of the outer tube 4 of valve pipe 5.Land 1b is provided with one and connects strong point D, is used for the rotary manipulation of engage controlling rod 1d, makes 5 relative outer tubes 4 slips of valve pipe.Connecting plate 1c connects the connection strong point C of Engagement Control bar 1d, and the connection strong point D of land 1b.

Engagement link mechanism 1 also comprises the connecting rod 1e that is used to connect, and this connecting rod is connected land 1b and sets up and get in touch with lock pipe 2.Connecting rod 1e also is that the funtion part of mechanism 8 is kept in above-mentioned joint locking.

Below detailed description is used for lock pipe 2, the lock pawl 3 of lock tab link 10 and recessed link 20 and outer tube 4 and valve pipe 5.

Recessed link 20 comprises a housing 12, and housing is provided with a connecting tube 11, and the as described below and protruding link 10 of this connecting tube matches and engages, and an auxiliary connecting device 15 is connected to the rear portion of housing 12, is used to connect the pipeline of mobile device.

In this kind structure, cryogen coupling piece 30 comprises that engaging locking keeps mechanism 8.Therefore, utilizing controlling rod to carry out attended operation (being with the arrow solid arc among Fig. 1) in the engagement link mechanism 1 can make the joint locking keep mechanism 8 with the straight solid line slip of valve pipe 5 along the band arrows.As a result, the outer wall of lock pawl 3 is locked pipe 2 and is covered, thereby prevents that lock pawl 3 from moving along the lockout direction, and just lock pawl 3 can not outwards be opened, and has therefore played the function that locking keeps.Engage locking retaining mechanism 8 and can not produce any influence, and the mechanism that is provided with in the outer tube is in order to solve the problem that ice and gas are discharged for the mechanism that is arranged on outer tube 4 inside.

Therefore, according to the present invention, the cryogen coupling piece can use separately, can solve simultaneously the problem that ice and gas are discharged, thus, enlarged the application area of connector, the operator need not keep and keep an eye on coupling piece in connection with after engaging, can carry out other relevant work, thereby effectively improve efficient.

Fig. 2 is the stereogram of connector profile among Fig. 1.Fig. 2 (a) is depicted as state and Fig. 2 (b) is depicted as lock state before the locking.Identical part is used identical label declaration, and the description that repeats will be omitted.

Before the locking shown in Fig. 2 (a) among state and Fig. 1 the state shown in the double dot dash line corresponding.The state shown in the solid line is corresponding among lock state shown in Fig. 2 (b) and Fig. 1.The relation between the mounting point of mechanism 8 is kept in the joint locking of understanding engagement link mechanism 1, lock pipe 2, lock pawl 3, outer tube 4 and protruding link 10 from this stereogram easily.

With reference to Fig. 2, above-mentioned being provided with engages locking and keeps the structure of the cryogen coupling piece 30 of mechanism 8 and will be described in detail below.

Fig. 3 is the plan view of protruding link shown in Figure 1.Fig. 4 is for vertically cuing open the cross-sectional view of the protruding link of getting along XA-XA among Fig. 3.Figure 3 shows that the square protruding link of seeing 10 on paper, its concave link 20 has been removed from Fig. 1, and protruding link 10 is kept state (state shown in the two-dot chain line) before being in locking.

As can be known, the Engagement Control bar 1d of engagement link mechanism 1 comprises a pair of controlling rod that is located at the vertical symmetry on engagement link mechanism 1 the right and the left side from Fig. 3 and 4.Be the grip part 1da of round bar shape, be arranged between the lower control arm.The operator uses grip part 1da to grasp protruding link 10.

Lock pipe 2 matches with the outer wall of outer tube 4, and outer tube 4 front and back slip relatively (among Fig. 4 upper and lower).One connecting ring 21 is arranged on the rear portion of lock pipe 2, and connecting ring 21 contacts with the inwall of lock pipe 2.Connecting ring 21 usefulness screws 22 are fixed from the outer wall of lock pipe 2.Connecting ring 21 is vertically arranged with internal thread along it, and the tip male thread of connecting rod 1e engages.By this connecting rod 1e, the land 1b on locking pipe 2 and being fixed on valve pipe 5 is connected.As a result, lock pipe 2 can slide before and after valve pipe 5.

Three lock pawls 3 support by strong point 3a, thereby are positioned at respectively in three lock pawl embedded holes of front portion of outer wall of outer tube 4, and like this, three lock pawls 3 can rotate to the outside from the inside of outer tube 4.Spring 3b is arranged between the relative position of the rear portion of lock pawl 3 and outer tube 4, thereby lock pawl 3 bears bias voltage all the time in a direction (towards the inside of outer tube 4), and the front of lock pawl 3 (top among Fig. 4) can keep the locking that engages with recessed link 20 like this.

Valve pipe 5 with can before and after the mode of sliding be installed in the outer tube 4.Spring 41 is arranged between valve pipe 5 and the outer tube 4.Spring 41 provides bias voltage for valve pipe 5, so that valve pipe 5 remains on the rear sliding position of relative outer tube 4.When the keep state [0] of Engagement Control bar 1d before lock rotates to locking when keeping state [6], valve pipe 5 overcomes bias voltage shown in Figure 4, keeps state [0] before lock and slides into locking forward and keep state [6] (shown in the double dot dash line).

One stop ring 42 is installed on the outer wall of outer tube 4, and is positioned at outer tube 4 middle part longitudinally substantially.Stop ring 42 is adjacent with the connecting ring 21 that is fixed on the lock pipe 2, and like this, lock pipe 2 does not recross stop ring 42 relative outer tubes 4 and slides backward.The controllable valve pipe 5 as a result, make valve pipe 5 not recross stop ring 42 relative outer tubes 4 and slide backward.

Valve pipe 5 also further is provided with auxiliary tube 51 and spring 52.The first butt joint valve element 6 is provided with protruding supporting plate 7.These will be elaborated with reference to Fig. 5 and 6 below.

Fig. 5 (a) is the valve pipe of the protruding link shown in the pie graph 1 and the longitudinal section of the first butt joint valve element.Fig. 5 (b) is the plan view of Fig. 5 (a).Fig. 5 (c) is used for illustrating the action of valve pipe shown in first butt joint relative Fig. 5 of valve element (a).

Valve pipe 5 is provided with low temperature seal part 5a, scraping ring 5b and stop ring 5c in its outside front.When valve pipe 5 was assemblied on the protruding link 10, low temperature seal part 5a provided fluid-tight between the inwall of valve pipe 5 and the connecting tube 11 that matches with it.Be adjacent to the scraping ring 5b that is provided with before the Sealing 5a, be used for and wipe off attached to the ice film on the inwall of connecting tube 11.Stop ring 5c fixes Sealing 5a and scraping ring 5b, and like this, Sealing 5a and scraping ring 5b can be from the top landings of valve pipe 5.

Inwall in front is opened to form valve port 5h, and fluid can pass through by this valve port.Valve port 5h closes to keep the sealing of fluid by the first butt joint valve element 6.

Half slot 5e is used for fixing land 1b shown in Figure 1, and this half slot is arranged on the precalculated position of valve pipe 5 external rear wall.And the conical internal thread 5f that pipeline is used is used to connect the end of the pipeline of drawing from holding vessel, and this internal thread is arranged on the inwall of back of valve pipe 5.The opening of back is a raw material mouth 5g.

The first butt joint valve element 6 is installed in the valve pipe 5, and this butt joint valve element can slide front and back, and an auxiliary tube 51 is fixed by the stop ring 5d that is positioned at its rear portion.Valve pipe 5 is equipped with spring 52 between the auxiliary tube 51 and the first butt joint valve element 6.52 pairs first on spring butt joint valve element 6 applies bias voltage in the direction to front slide.Bias voltage makes the butt joint valve element 6 valve port 5h of cut-off valve pipe 5 all the time that wins, to keep fluid-tight.In this case, between the back of the front of auxiliary tube 51 and the first butt joint valve element 6, form a predetermined gap E.

When the first butt joint valve element 6 is subjected to downward sliding force and when overcoming bias voltage, the first butt joint valve element, 6 relative valve pipes 5 are withdrawn, and up to the degree that gap E shown in Fig. 5 (c) is eliminated, remove above-mentioned fluid-tight whereby.

Most of positions of the first butt joint valve element 6 are compared little with the internal diameter of valve pipe 5, to such an extent as to produce the interval of a preliminary dimension.The first butt joint valve element 6 its rear portion and anterior around the inwall of two protuberance 6a being provided with and valve pipe 5 adjacent, and without any the gap.One slippage metal ring 61 embeds in the groove that is located on the projection 6a outer wall, and such first butt joint valve element 6 can level and smooth slippage in valve pipe 5.

Because the valve pipe 5 and the first butt joint valve element 6 can keep fluid-tight, protruding link 10 has so-called automatic sealing function, even thereby when protruding link 10 separates with recessed link 20, fluid can be from protruding link 10 yet seepage.

Fig. 6 (a) is depicted as the longitudinal section of the first butt joint valve element among Fig. 5 (a).Fig. 6 (b) is its plan view.Fig. 6 (c) is the stereogram of its profile.

Except foregoing description, the first butt joint valve element 6 also comprises the supporting plate joint 6b that is arranged on its top, a protruding supporting plate 7, comprise a poppet body 7a, its top is provided with projecting end 7aa, and a seal 7b, form a sealed department, be used for the valve port 5h of draught excluder pipe 5.Protruding supporting plate 7 is connected to supporting plate joint 6b by screw 62, and like this, seal 7b places between poppet body 7a and the supporting plate joint 6b.

Seal 7b is a sealed department, and when using coupling piece, the sealing body connects very continually and throws off, thereby often weares and teares.Seal 7b is removable.Therefore, coupling piece can use continuously by changing this part, can not reduce sealability, thereby make the reduction of cost become possibility.

In addition, because seal is exposed to cryogen, thereby seal need have winter resistance and better seal performance.A kind of preferred material that is used for seal is a teflon plate.Because seal can be dismantled and change, and when better material can adopt, can change previous material with better material, thereby can obtain better antiwear property and sealability.

Be provided with a raw material head piece 6c after the supporting plate joint 6b of next-door neighbour's first butt joint valve element 6, like this, fluid can flow to inwall from the outer wall of the first butt joint valve element 6, and the first butt joint valve element has big as far as possible transverse cross-sectional area to be passed through for fluid.

Fig. 7 (a) shows in detail the front portion of outer tube shown in Figure 1.Fig. 7 (b) is its longitudinal section.Fig. 7 (c) shows in detail its rear portion.Fig. 8 (a) is the cross-sectional view of the XB-XB intercepting in Fig. 7 (b).Fig. 8 (b) is the longitudinal section along the XC-XC intercepting.Fig. 8 (c) is its plan view.

Outer tube 4 integral body are tubular.Shown in Fig. 7 (a) and 7 (b), outer tube 4 is provided with three lock pawl embedded hole 4a in its front portion, and this lock pawl embedded hole is penetrated into inwall from the outer wall of outer tube.Lock pawl embedded hole 4a is provided with lock pawl pivoted hole 4aa, and this hole penetrates the wall of embedded hole 4a along circumferencial direction.One spring pin or other similar structure are compatible with pivoted hole 4aa by insertion.Like this, form the centring point 3a of lock pawl 3 shown in Figure 4.And the front of outer tube 4 can be used as scraping ring 49, and this scraping ring can be wiped the ice film off from the outer wall of the connecting tube 11 that contacts with outer tube 4.

Embedded hole 4a is provided with lock pawl rear portion accommodating part 4ab at its rear portion.Lock pawl rear portion accommodating part 4ab is provided with spring base hole 4ac, embeds spring 3b (Fig. 4) in this hole, and spring is used for the surface, the rear lower side of lock pawl 3 is imposed bias voltage.

Stop embedded hole 4a rear is provided with ice and overflows window 4b on the outer wall of outer tube 4.The ice that adheres on the outer wall of the valve pipe 5 of outer tube 4 slides forwards can be wiped off by scraping ring 11a, and this scraping ring is the front of the connecting tube 11 of recessed link 20 (Figure 13).The ice of wiping off overflows window 4b from ice discharges.

Being used for that stop ring 42 (Fig. 4) is installed to annular groove 4c in the outer wall of outer tube 4 overflows window 4b along ice and vertically is arranged on the middle part that ice overflows window.

The half slot 4d that is used for fixing the connecting rod fixed tray 1a of engagement link mechanism 1 is arranged on the end of the outer wall of outer tube 4.

The inwall of outer tube 4 is provided with local protuberance 4e and 4f at its front and rear.The internal diameter of protuberance 4e and 4f is according to making protuberance 4e and 4f and the outer wall of valve pipe 5 seamlessly cooperate to determine.Valve pipe 5 can the level and smooth slip in front and back in outer tube 4.The rear portion of back protuberance 4f is anterior corresponding with spring 41 shown in Figure 4, is subjected to bias voltage between outer tube 4 and valve pipe 5.

Fig. 9 (a) is the plan view of lock pawl shown in Figure 1.Fig. 9 (b) is the cross-sectional view along XD-XD intercepting among Fig. 9 (a).

Lock pawl 3 is forms of cuboid.Lock pawl 3 is provided with one and penetrates its vertically pivoted hole 3a (corresponding with the strong point 3a among Fig. 4) at the rear portion on surface, and one be positioned at its following groove, and this groove and pivoted hole extend in parallel.The antetheca of groove forms retainer 3d.The dorsal part of lock pawl 3 is corresponding with the downside that is provided with retainer 3d, is one flat 3e, extends above pivoted hole 3a.The rear portion of the lock pawl 3 after the flat 3e of portion comprises unclamps the 3f of tapering 3s peace portion.When lock pipe 2 is withdrawn into the rear portion and contacts (Fig. 9 (b)) with lock pawl 3, unclamp tapering 3s and make lock pawl 3 move along counterclockwise direction or title lockout direction relative to pivoted hole 3a.

The spring receiving bore 3c that is used to hold spring 3b shown in Figure 4 is located at lock pawl 3 downside rear portions, specifically, is located at relative pivoted hole 3a, with retainer 3d corresponding section.

Figure 10 (a) is the plan view of lock pipe shown in Figure 1.Figure 10 (b) is the cross-sectional view along XE-XE intercepting among Figure 10 (c).Figure 10 (c) is its longitudinal section.

Lock pipe 2 integral body are cylindric.Lock pipe 2 is provided with six window 2a, and these windows penetrate inwall along square settings such as lock pipe circumference from outer wall.Lock pipe 2 has a protuberance 2b, and it is arranged in lock pipe anterior (at builtup member), has less internal diameter, and one unclamp tapering 2s, its with lock pawl 3 to unclamp tapering 3s corresponding, and be positioned at after the protuberance 2b, just lock is managed 2 inboard in front.The internal diameter of lock pipe 2 increases progressively towards the rear portion along unclamping tapering 3s.

The attachment hole 2c that is used for connecting ring 21 shown in the connection diagram 4 is arranged on around the back of lock pipe 2.

As can be seen from Figure 4, protuberance 2b has covered the outer wall of the lock pawl 3 that is arranged on the outer tube 4, plays control lock pawl 3, makes lock pawl 3 can not keep the effect that state enters the lockout state from locking.

From Fig. 4, it can also be seen that, when lock pipe 2 is withdrawn into rear end (further downward slightly from position shown in Figure 4) when contacting with lock pawl 3, aforementioned lock pawl 3 and lock pipe 2 unclamping tapering 3s and 2s and can make that lock pawl 3 is counter-clockwise or move separately in the lockout direction.

Figure 11 (a) is the plan view of connecting rod fixed tray shown in Figure 1.Figure 11 (b) is its side view.

Connecting rod fixed tray 1a is dull and stereotyped form.Connecting rod fixed tray 1a is provided with a large diameter outer tube fixed hole 1aa, this hole surface from it penetrates lower surface, this connecting rod fixed tray also is provided with fixedly via hole 1ab (corresponding with the some A among Fig. 1) of outer tube, and strong point hole 1ac, be used for fixing a pivot (strong point B of Fig. 1) by inserted mode, these two kinds of Kong Jun penetrate the relative bi-side of connecting rod fixed tray 1a.

Figure 12 (a) is the plan view of land shown in Figure 1.Figure 12 (b) is its side view.

Land 1b is dull and stereotyped form on the whole.Land 1b is provided with large-diameter valve tube fixed hole 1ba, penetrates the bottom and upper segment of land, and connecting rod hole 1bb is arranged on respect to relative both sides longitudinally, by this connecting rod hole, connecting rod 1e can be passed, and valve pipe fixedly via hole 1bc penetrates its both sides.Valve pipe fixedly via hole 1bc is corresponding with the connection strong point D among Fig. 1.

Figure 13 is the longitudinal section of Fig. 1 concave link.Longitudinal section among Figure 13 illustrates the recessed link 20 (Fig. 1) that is separated with protruding link 10, and will turn upside down.

As shown in figure 13, recessed link 20 comprises one second butt joint valve element 13, and this second butt joint valve element also comprises a recessed supporting plate 14 and a spring 16 except that the connecting tube shown in Fig. 1 11, housing 12, auxiliary connecting device 15.

Connecting tube 11 is outstanding from housing 12.Connecting tube 11 is assembled in the mode that can separate with housing 12.Connecting tube 11 matches between the valve pipe 5 of protruding link 10 and outer tube 4.The external diameter of matching part successively decreases so that be assembled on the protruding link 10.Connecting tube 11 is provided with a scraping ring 11a, is used to wipe off the ice film attached on the protruding link 10, and a locking groove 11b, is located at the rear portion of connecting tube 11, and the retainer 3d that is arranged on the lock pawl 3 of outer tube 4 is coupled in this locking groove.

The inside of connecting tube 11 is provided with the fluid passage.One side of the passage relative with protruding link is as raw material mouth 11c.In the part of connecting tube 11, promptly on the valve port 11d, can closing passage by the second butt joint valve element 13, thus can finish fluid-tight.

It should be noted that locking groove 11b, the outer tube 4 of connecting tube 11 lock pawl 3, be used to control lock pipe 2 that lock pawl 3 locks/unclamp etc., be to be used for keeping the adapting device that protruding link is connected with recessed link.

The scraping ring 4g and the ice of the scraping ring 11a of connecting tube 11, the scraping ring 5b of valve pipe 5 and outer tube 4 overflow window 4b, all are the devices that is used for deicing.They are referred to as the ice removal device.

The second butt joint valve element 13 is installed in the housing 12, and with the second butt joint valve element 13 can before and after the mode of sliding install.All the time be subjected to bias voltage to realize fluid-tight by spring 16, the second butt joint valve elements 13 towards connecting tube 11.As shown in figure 13, recessed link 20 has so-called automatic sealing function, like this, even recessed link 20 separates with protruding link 10, fluid can be from protruding link 20 yet seepage.

Figure 14 (a) is the plan view of the second butt joint valve element shown in Figure 13.Figure 14 (b) is its longitudinal section.Figure 14 (c) is its outline view.

The second butt joint valve element 13 have with Fig. 6 in the first essentially identical structure in top of docking valve element 6 of protruding link 10.The second butt joint valve element 13 is provided with supporting plate joint 13a.Recessed supporting plate 14 comprises: a poppet body 14a comprises the protruding terminus 14aa at the top that is arranged on supporting plate joint 13a; And a seal 14b, form sealed departments with connecting tube 11.When seal 14b put between poppet body 14a and the supporting plate joint 13a, recessed supporting plate 14 can be connected on the second butt joint valve element 13 by screw 17.

Seal 14b is a sealed department, move very continually when coupling piece uses, thereby the sealing body weares and teares easily.Seal 14b is removable.Therefore, by changing this part, can not reduce sealability, coupling piece can use always, thereby makes the reduction of cost become possibility.

And, because seal is exposed to cryogen, so need seal to have winter resistance and better seal performance.The preferred material that is used for seal is a teflon plate.Because seal is detachable and removable, when better material can be utilized, can change previous material with better material, thereby can obtain better wear resistance and sealing.

Raw material discharge orifice 13b is provided with near the supporting plate joint 13a of the second butt joint valve element 13, and fluid can flow to inwall from the outer wall of the second butt joint valve element 13 like this, and this second butt joint valve element has big as far as possible fluid and passes through cross-section area.

Figure 15 (a) is the plan view of housing shown in Figure 13.Figure 15 (b) is its longitudinal cross-section view.

Housing 12 integral body are a flange-like.A flanged surface is junction surface 12a, and connecting tube 11 connects thereon.Connect screw 12aa in junction surface 12a is provided with, be used for equidistantly being connected to predetermined circle.

The middle part of junction surface 12a is formed for installing the housing bore 12b of the second butt joint valve element 13, and the second butt joint valve element 13 is slidably installed.The bottom surface 12c of housing bore 12b is provided with the groove 12d that is used for fixing spring 16, and spring applies bias voltage towards 11 pairs second butt joints of connecting tube valve element 13.

The middle part that provides the through hole 12e of fluid passage to be arranged on bottom surface 12c arrives the convex surface 12f on the opposing side of housing 12.The junction surface of convex surface 12f and auxiliary connecting device 15 is adjacent.Connect screw 12ga in the step surface 12g of the periphery of convex surface 12f is provided with, be used to connect the auxiliary connecting device 15 that equidistantly is arranged on the predetermined circle.Figure 16 is used for the principle of the engagement link mechanism of interpretation maps 1 convexity link.

Engagement link of the present invention mechanism comprises reversing mechanism, and this reversing mechanism can be easily and positively kept and engages locking and keep mechanism's ground joint and lock.Below engagement link mechanism and reversing mechanism will be described.

Among Figure 16, the pivoting point B of label A, B, C, D and immovable point A, Engagement Control bar 1d, the connection strong point D that engages strong point C and land 1b shown in Figure 1 are corresponding.Line by immovable point A and pivoting point B is corresponding with connecting rod fixed tray 1a, and just the outer tube among Fig. 14 is corresponding.Line by strong point B and C is corresponding with Engagement Control bar 1d.Line by strong point C and D is corresponding with connecting plate 1c.It is corresponding with the motion of valve pipe 5 and lock pipe 2 to connect strong point D.

According to this kind engaged mode, be appreciated that when Engagement Control bar 1d rotates valve pipe 5 and lock pipe 2 are how slide in front and back.Particularly, when Engagement Control bar 1d when right rotation (direction shown in the band arrow solid arc among Figure 16), make to connect strong point C and be converted to state [1], [2], [3], [4], [5] and [6] in regular turn from state [0].Corresponding therewith, connect strong point D and slide into state [1], [2], [3], [4], [5] and [6] in regular turn from state [0] at the fore-and-aft direction of valve pipe 2.

State in Figure 16 [5], the direction of Engagement Control bar 1d is identical with the direction of connecting plate 1c.In this case, circular arc BC is by connecting B-C, draws a circular arc and obtains around strong point B.Circular arc DC is by connecting C-D, draws a circular arc and obtains around strong point D.

To compare as can be seen between circular arc DC and the circular arc BC, state [5] is the most preceding terminal point of strong point D to front slide.At this moment, Engagement Control bar 1d is further rotated the right, also, rotates to state [6], and strong point D is slippage backward oppositely.

In this case, strong point D applies bias voltage backward by the relative all the time outer tube 4 of the spring 41 between outer tube 4 and valve pipe 5.Bias voltage is by shown in the hollow arrow among Figure 16.Therefore, if strong point D crosses state [5], Engagement Control bar 1d is applied in bias voltage and rotates with further clockwise direction, thereby can keep state [6].In other words,, and do not remove to manage Engagement Control bar 1d even unclamp the hand of rotation Engagement Control bar 1d, also can hold mode [6].

This mechanism comprises engagement link mechanism 1, is exactly said reversing mechanism.

It should be noted that Engagement Control bar 1d can not be further rotated from state [6] in direction of engagement.This be because lever 1d with manage 2 as the lock of the outside of protruding link 10 grades adjacent.Can one break be set selectivity.

Figure 17 (a) is used for the lockout state of interpretation maps 1 coupling piece.Figure 17 (b) is used for explaining the state of keeping that locks.Hereinafter with reference to these figure, engage locking and keep the connection joint and the locking of the cryogen coupling piece among the present invention of mechanism and keep/unclamp and describe including.

The protruding link of cryogen coupling piece 30 will be engaged with each other in such a way with recessed

link

10 and 20 and be connected.At first, the connecting tube 11 of the outer tube 4 of protruding link 10 from external mounting to recessed link 20.Protruding link 10 is pushed into recessed link 20, and is adjacent up to the shoulder of the top of outer tube 4 and connecting tube 11.In this case, the scraping ring 4g of outer tube 4 will wipe off attached to the ice film on the outer wall of connecting tube 11, so that the ice film can not hinder promotion.

It should be noted that working as protruding link 10 is separated with recessed link 20, perhaps both engage the back when fluid-tight is forced to discharge, and joint 10 and 20 is because automatic sealing function (Fig. 5 and Figure 13) can be finished fluid-tight, and fluid can seepage like this.

This state is shown among Figure 17 (a).At this, the retainer 3d of lock pawl 3 is not coupled among the locking groove 11b of connecting tube 11.This is because the Engagement Control bar 1d of engagement link mechanism 1 is positioned at lowest state [0], like this, lock pipe 2 and lock pawl 3 separately unclamp tapering 2s and 3s (Fig. 9 and Figure 10) is adjacent to each other, make lock pawl 3 be positioned at the lockout state.

In this case, if handle and rotation Engagement Control bar 1d from state shown in Figure 16 [1] to [6], the retainer 3d of lock pawl 3 at first is coupled to the locking groove 11b of connecting tube 11, the joint of protruding like this link and recessed link is locked, and last protruding link and recessed link become the state shown in Figure 17 (b).In Figure 17 (b), state consistency is represented with label [1] to [6] shown in the tip position of lock pipe 2 and Figure 16.

As shown in figure 16, have only valve pipe 5 to continue to front slide according to the relative outer tube 4 of the rotation of Engagement Control bar 1d with lock pipe 2.At first, the top slide of valve pipe 5, the while is adjacent with the inwall of the connecting tube 11 of recessed link, and scraping ring 5b also is the top of valve pipe 5 like this, will wipe off attached to the ice film on the inwall of connecting tube 11.Stay enclosed space between connecting tube 11 and the valve pipe 5 attached to the ice film of the outer wall of valve pipe 5.Yet, since enclosed space to compare with the ice of wiping off be enough big, can not interfere with engaging of protruding link and recessed link so ice.

On the other hand, the scraping ring 11a of connecting tube 11 will wipe off attached to the ice film on the outer wall of valve pipe 5.Ice enters the gap between valve pipe 5 and the outer tube 4, and perhaps the ice by outer tube 4 overflows window 4b (Fig. 7 and Fig. 8) discharge outside, thereby ice can not interfere with joint.

The Sealing 5a at the top of the fluid-tight between the outer wall of the inwall of connecting tube 11 and valve pipe 5 by being arranged on valve pipe 5 keeps.

When protruding link further slips into recessed link, the protruding terminus 7aa of the protruding supporting plate 7 of the first butt joint valve element 6 of protruding link, the protruding terminus 14aa of recessed supporting plate 14 that docks valve element 13 with second is adjacent.Afterwards, has only valve pipe 5 further to advancing slip.5 pairs first butt joints of the valve pipe of the protruding relatively link of bias voltage of spring 52 (Fig. 5) valve element 6 applies a bias voltage, and 11 pairs second of the connecting tubes that this bias voltage is set at less than the recessed relatively link of spring 16 dock the bias voltage that valve element 13 is applied.Therefore, the first butt joint valve element 6 that has only protruding link promptly slides backward sliding with respect to direction forward, is 0 up to gap E, and shown in Fig. 5 c, the rear end of the first butt joint valve element 6 and the front end of auxiliary tube 51 are adjacent.

Afterwards, when valve pipe 5 further slided, the first butt joint valve element 6 can not continue the back to be slided.Therefore, fluid-tight is unclamped in the second butt joint valve element, 13 relative connecting tube 11 withdrawals of recessed link.In this manner, at first, the fluid-tight in protruding link between the first butt joint valve element 6 and the valve pipe 5 is released, and the second butt joint valve element 13 and the fluid-tight between the connecting tube 11 of recessed link are also released.Cryogen can be supplied with between protruding link 10 and recessed link 20 and flow afterwards.

In this case, just be adjacent to each other with before unclamping sealing at protruding link and recessed

link supporting plate

7 and 14 separately, the enclosed space that carries out fluid-tight by connecting tube 11 and valve pipe 5 is very little.Therefore, the influence of the oxygen that contains in the outside air can be ignored, and gas is discharged also no longer have been needed.

In this case, the lock pawl 3 of the joint of protruding link 10 and recessed link 20 by protruding link and the locking groove 11b locking of the connecting tube 11 of the recessed link shown in Figure 17 (b).By the protuberance 2b of lock pipe 2 (Figure 10), can prevent lock pawl 3 in release direction (outwards motion is opened) rotation, thereby keep locking.

At this moment, Engagement Control bar 1d is in state [6].Even hand unclamps from Engagement Control bar 1d, do not go to manage it, state [6] also can be kept, and makes locking keep state and is maintained.Therefore, the operator can do other related task.

When unclamping connection, when making protruding link 10 and recessed link 20 separated from one another, carry out the step opposite with above-mentioned steps.Equally, in this case, the fluid-sealed closed space between connecting tube 11 and the valve pipe 5 is very little.Therefore,, be discharged in the outside air, to environment or light and the danger that brings adverse effect of exploding also is very low, on safety, do not have what problem substantially by separating this coupling piece even remain on the cryogen of enclosed space.Figure 18 shows the whole system of using cryogen coupling piece shown in Figure 1 to supply with LNG.

As an example, LNG supply system 50 uses cryogen coupling piece 30 of the present invention, and LNG Liquefied natural gas (LNG) supplies to from the base jar BT as holding vessel among the jar MT as the tank trailer of mobile device.

The supply main pipe PO and the feedback main pipeline PI that are provided with pressure meter PG are connected to base station tank BT.Supply with main pipe PO be divided into the service PO1 of branch, PO2 ..., be provided with pressure meter PG, flowmeter FM, control valve CV, loading arm LA, protruding link 10 on branch's service respectively according to the order of sequence.Feedback main pipeline PI be divided into branch feedback pipeline PI1, PI2 ..., on branch feedback pipeline, be provided with pressure meter PG, flowmeter FM, control valve CV, loading arm LA and protruding link 10 respectively according to the order of sequence.

Service PO1 of branch and branch feedback pipeline PI1 are provided with protruding link 10, are as a LNG supply position 40.System 50 is provided with a plurality of LNG and supplies with position 40.

Being respectively applied for two recessed links 20 supplying with and feed back fixes and is connected on the jar MT of tank trailer.Jar MT uses the coupling piece adjoining land or alternately supplies with LNG.In other words, for a pair of protruding link 10, can use a plurality of recessed links 20.In this, to have simple structure relatively good for recessed link 20 as the present invention, and cost is low.

LNG supply system 50 adopts cryogen coupling piece 30 of the present invention, connects with the jar MT with mobile device, thereby need not discharge gas.Therefore, adopt that the base of common flange coupling piece is needed to be used to discharge the pipeline that is purged gas, only be used to open or close and supply with needed open/closed valve, or the like, no longer be essential, therefore make the reduction of cost become possibility.

Even be provided with a plurality of air feed position, also need do not wait for finishing of other mobile device air feed.Therefore, the convenience that LNG supplies with has obtained improving greatly, and owing to discharges the environmental pollution that the seepage etc. of gas causes and also reduced.

Because cryogen coupling piece 30 is provided with and engages locking and keep mechanism 8, if engage locked and when carrying out other task, protruding link 10 can be kept an eye on.Therefore, improved workability.And, when unclamping, only need handle engagement link mechanism.Therefore handle and be easy to.

Each protruding link 10 need not combine with other protruding link 10 just can have separately to engage to lock keeps function.Protruding link 10 can be used for following occasion, and when supplying with cryogen, service and feedback pipeline independently are installed in diverse location, perhaps do not need the occasion of feedback pipeline.Therefore, enlarged Applicable scope.

It should be noted that engaging locking framework is characterised in that cryogen coupling piece of the present invention not only can combine with the link in the above-mentioned example, also can be the cryogen coupling piece with identity function.Engage locking and keep the combination that mechanism is not confined to above-mentioned lock pawl, lock pipe yet and comprises the engagement link mechanism of reversing mechanism, it also can have various variations.

For example, lock pawl can be subjected to bias voltage towards the lockout side all the time, locks pipe simultaneously and is used to adjust the locking of lock pawl/unclamp.In this case, no longer need independent release arrangement.And lock pawl can be recessed, and locking groove is protruding.

In the above-described embodiments, recessed link is arranged on the mobile device, and protruding link is arranged on the base.According to the embodiment that cryogen is supplied with, recessed link also can be arranged on the base, and protruding link is arranged on the mobile device.

The invention effect

According to the cryogenic fluid joint of claim 1, its convexity, recessed connector engage with Supply with fluid, be used for keeping or unclamp the joint locking that protruding, recessed connector engages and keep mechanism Consist of whole cryogenic fluid joint with engagement link mechanism, comprise the engagement link machine Structure. Therefore, cryogenic fluid joint can be used separately, and the row of ice and gas can be solved Put problem. Enlarged the scope of application of hookup. After connecting and engaging, the operator can Free, needn't keep an eye on hookup, and do other relevant work, therefore so that effect The raising of rate becomes possibility.

According to the cryogenic fluid joint of claim 2, except the effect of claim 1 it This structure that can supply with cryogen and not need to get rid of the hookup of gas is done outward, Detailed description, and the joint in this hookup structure locking kept the structure of mechanism Also done detailed description. Especially, this joint locking is kept mechanism and is had simple structure, Wherein in protruding connector, lock pawl is arranged on outer tube, lock tube with engagement link mechanism phase The mode that related ground slides outside outer tube arranges, and in recessed connector, lock pawl is arranged on On the outer wall in front of tube connector. Therefore, this joint locking is kept mechanism as a section Part need not increase the cost of whole hookup can be realized.

According to the cryogenic fluid joint of claim 3, except the effect of claim 2 it Only lock/unclamp by unclamping the tapering and can realize on lock tube and the lock pawl outward. Locking/ Unclamp also and can come together to realize with engagement link mechanism. Simplify the structure, reduced cost.

According to the cryogenic fluid joint of claim 4, except in

claim

2 and 3 Outside arbitrary effect, also be provided with the device for deicing, therefore, protruding, recessed connector Connect and can not be subjected to because cryogen and the impact of the ice film that produces at hookup.

According to the cryogenic fluid joint of claim 5, except in the claim 2 to 4 Outside arbitrary effect, the sealing of the first docking valve element and the second docking valve element is removable Unload removable. Therefore, when using hookup, sealing is most important position, connects Touch and throw off the most frequently, thereby sealing weares and teares easily. By changing this position, Can not reduce sealing property, hookup can continue to be used, therefore so that the reduction of cost Become possibility.

Claims

1. one kind is used for transmitting cryogen between holding vessel and mobile device, cryogen coupling piece as LNG Liquefied natural gas, wherein, one protruding link comprises an engagement link mechanism, described engagement link mechanism has an Engagement Control bar, described protruding link engages with transmitting fluid with a recessed link

Wherein, described cryogen coupling piece comprises that one engages locking and keeps mechanism; And working as described protruding link and described recessed link is combined together by insertion, when handling described Engagement Control bar, the adapting device that startup is provided with for described protruding link and described recessed link, thus the joint of described protruding link and described recessed link kept.

2. one kind is used for transmitting cryogen between holding vessel and mobile device, and as the cryogen coupling piece of LNG Liquefied natural gas, wherein, a protruding link engages with transmitting fluid with a recessed link,

Wherein said protruding link comprises an engagement link mechanism, described engagement link mechanism comprises one first butt joint valve element, its perisporium is provided with the raw material head piece, one valve pipe, be provided with a raw material mouth in its holding vessel side, be provided with a valve port in its recessed link side, wherein, described valve port is by being applied in the described first butt joint valve element sealing of a bias voltage all the time, and an outer tube holds described valve pipe, wherein said valve pipe is applied in a bias voltage all the time in disengaged direction, and an Engagement Control bar, wherein handle described Engagement Control bar and can make the described relatively outer tube of described valve pipe move to an engagement positio

Described recessed link comprises one second butt joint valve element, its perisporium is provided with a raw material head piece, an and connecting tube, move a jar side at it and be provided with a raw material mouth, be provided with a valve port in its protruding link side, wherein said valve port is by being applied in the described second butt joint valve element sealing of bias voltage all the time

Described cryogen coupling piece comprises that also one engages locking and keeps mechanism, wherein, the locking of described joint is kept mechanism and is comprised at least one lock pawl, and described lock pawl is articulated on the appropriate location on the described outer tube outer wall of described protruding link, simultaneously be applied in a bias voltage at a locking direction, one lock pipe matches with described valve pipe, moves forward and backward outside described outer tube, an and locking groove, corresponding with described lock pawl, be arranged on the position on the connecting tube of described recessed link

Therefore, when the outer tube that makes described protruding link by insertion fitted into the connecting tube of described recessed link, described lock pawl was by described locking groove locking; Afterwards, when handling described Engagement Control bar in direction of engagement, the slippage of described valve pipe, thereby the described first and second butt joint valve elements adjoin each other, thus, the valve port of the connecting tube of the valve pipe of described protruding link and described recessed link is opened, thereby allowed the described cryogen of transmission, described lock pipe covers described lock pawl and unclamps described lock state with prevention simultaneously.

3. cryogen coupling piece according to claim 2, wherein at the rear portion, the back side of described lock pawl and the front inwall of described lock pipe be provided with and unclamp the tapering, when described lock pipe was positioned at the rear end, the described tapering of unclamping adjoined each other, so that described lock pawl moves along a lockout direction.

4. according to claim 2 or 3 each described cryogen coupling pieces, wherein said protruding link and recessed link comprise deicer, are used for the ice that produces owing to cryogen is wiped off; Described deicer comprises at least one scraping ring, described scraping ring comprises a front of the outer tube of described protruding link, one is arranged on the ice overfolw hole of an appropriate location of described outer tube, one is arranged on the scraping ring at the valve pipe top of described protruding link, and connecting tube one scraping ring in front that comprises described recessed link.

5. according to each described cryogen coupling piece in the claim 2 to 4, wherein, the first butt joint valve element of described protruding link has the sealed department with described recessed link adjacency, and the second butt joint valve element of described recessed link has the sealed department with described protruding link adjacency; And described sealed department is removable.