CN105276060A - Double-pipeline liquid inertia container with variable inerter coefficient - Google Patents

Abstract

The invention provides a double-pipeline liquid inertia container with a variable inerter coefficient. The double-pipeline liquid inertia container with the variable inerter coefficient comprises a hydraulic cylinder barrel, a piston, a piston rod, two metal spiral pipelines, on-off control valves and several other connecting pieces. The piston is placed in the hydraulic cylinder barrel and divides the hydraulic cylinder barrel into two chambers. The piston rod is connected with the piston. The two ends of each metal spiral pipeline are connected with the two chambers of the hydraulic cylinder barrel respectively. The on-off control valves are installed in the positions where the spiral pipelines are connected with the hydraulic cylinder barrel. According to the double-pipeline liquid inertia container with the variable inerter coefficient, the parameter of the inertia container is changed by changing the mass of oil in the liquid inertia container, connection and disconnection of the pipelines can be controlled by controlling the opening and closing of the valves, and the liquid inertia container device with the inerter coefficient capable of being adjusted to be large, medium and small is obtained by adjusting the circulating mode of the oil. Compared with the prior art, the double-pipeline liquid inertia container with the variable inerter coefficient has the advantages that the inerter coefficient can be adjusted, mechanism operation is stable, the structure is simple, the number of components is small, both machining and assembling are easy, the cost is low, the production efficiency is high, and the service life is long.

Description

A kind of dual circuit liquid of variable used matter coefficient is used to container

Technical field

The invention belongs to vehicle suspension system field, the dual circuit especially should being accustomed to the use of the variable used matter coefficient of the automobile suspension system of container is used to case.

Background technique

Cambridge University scholar SIMTH proposed the thought of used container in 2002, and designed pinion and-rack and be used to after container and ball screw type be used to container, achieved between machinery with electric network strict corresponding, facilitated the development of mechanical network.Machinery with electric network strict corresponding after, a large amount of electric network theories and research method just can be applied to mechanical system, comprise automobile suspension system, wheel steering system, train suspension system, building vibrating isolation system, helicopter vibrating isolation system, powered shock absorption device etc., and develop pinion and-rack and be used to container, container is used to by ball screw, fluid power generating polynomial is used to container, regulations and parameters quality is used to container, reverse used container, small teeth number difference planet gear reverses used container, and cycloidal ball reverses the various ways such as used container.

But this current several used container all exists considerable moving member, cause mechanism's processed complex, and cost is higher, and friction between parts is also more, and effectiveness in vibration suppression and the Expected Results of last mechanism still have a certain distance.

Chinese patent 201410721244.9 proposes a kind of used appearance and damping integral type gas-filled shock absorber, replaces traditional flywheel to realize the control to mechanical force with liquid inertia equipment.

But, the road conditions of automobile running, the load-carrying of vehicle itself is constantly change, and in varied situations, it is also different that the optimum of used container is used to matter coefficient, and traditional flywheel will change used matter coefficient, the complexity of mechanism will obviously increase, such that processing and assembling is more difficult, cost is higher, manufacturing efficiency is more low, needs to use a large amount of accurate device simultaneously, cause mechanism easily to be worn and torn, and then cause the life-span greatly to reduce.

Summary of the invention

For the deficiencies in the prior art, the dual circuit liquid that the invention provides a kind of variable used matter coefficient is used to container, and effectively can solving existing used tankage, to be used to matter coefficient immutable, complex structure, device longevity is short, processing with difficulty is installed, the high and low inferior problem of manufacturing efficiency of cost of production.Meanwhile, the design of dual circuit it also avoid used matter coefficient larger time, because liquid body flow, the moment produced causes the vibration displacement amount of pipeline to lag behind load to single-pipeline, and the peak value of displacement amount can be greater than dead load peak value, and then the vibration that generation is larger.Present invention employs the mode that dual circuit works simultaneously, cut down vibration each other, mechanism is run more stable, thus there is the life-span more of a specified duration.

The present invention is the object being realized above-mentioned technology by following technological means.

A kind of dual circuit liquid of variable used matter coefficient is used to container, it is characterized in that: comprise hydraulic cylinder, piston, piston rod, first metal spiral pipeline, second metal spiral pipeline, switching control pilot, piston is connected with piston rod, piston loads in hydraulic cylinder, hydraulic cylinder is divided into two chambers, two chamber barrels of hydraulic cylinder have two apertures, first metal spiral pipeline, second metal spiral pipeline is connected with an aperture on two chambers respectively, form two independently hydraulic oil circuits, described first metal spiral pipeline, switching control pilot is provided with between second metal spiral pipeline and aperture, described first metal spiral pipeline, hydraulic oil has been filled in second metal spiral pipeline oil hydraulic cylinder.

Preferably, the radius of described first metal spiral pipeline, the second metal spiral pipeline is different, the radius of spin is identical, and is arranged on same cylndrical surface.

Preferably, the radius of described first metal spiral pipeline, the second metal spiral pipeline is identical, the radius of spin is different, and is arranged on two concentric cylndrical surface.

Preferably, the material of the first metal spiral pipeline, the second metal spiral pipeline is copper, aluminium or special plastic.

Preferably, the turning radius of the first metal spiral pipeline, the second metal spiral pipeline is far longer than pitch.

Preferably, hydraulic cylinder radius is far longer than the radius of the first metal spiral pipeline, the second metal spiral pipeline.

Preferably, described switching control pilot is solenoid valve or hydrovalve.

The dual circuit liquid of variable used matter coefficient of the present invention is used to container, arrange two independently, respectively with the metal spiral pipeline of two chamber of hydraulic cylinder, by controlling the opening and closing of the switching control pilot between metal spiral pipeline and hydraulic cylinder chamber, realize the change that matter coefficient is used to by used container, can be divided into and open separately the first metal spiral pipeline, open separately the second metal spiral pipeline and the first metal spiral pipeline and the second metal spiral pipeline and open Three models simultaneously, three grades that achieve used container parameters can conditioning technology.Therefore, the dual circuit liquid of variable used matter coefficient provided by the present invention is used to container, can according to the traveling of automobile and condition of road surface, and the parameter of active or passive change self at any time, all can reach best travelling state to make automobile under various operating mode.

And, when two metallic coil work simultaneously time, two liquid flywheels turn on the contrary, four conduits that spiral pipeline can be made to extend out form symmetrical structure, eliminate the shearing dynamic stress due to asymmetric generation, avoid used matter coefficient larger time, because liquid body flows, the moment produced causes the vibration displacement amount of pipeline to lag behind load to single-pipeline, the peak value of displacement amount can be greater than dead load peak value, and then produce larger vibration, effectively can eliminate the vibration produced under large used matter coefficient, mechanism is run more steady, thus there is the life-span more of a specified duration.

In addition, the present invention realizes making used structure of container more exquisite for the encapsulation of used matter by liquid flywheel, solving existing used container, to be used to matter coefficient immutable, the immutable used container mechanism of coefficient is complicated, life-span is short, processing with difficulty is installed, the high and low inferior problem of manufacturing efficiency of cost of production, thus make the effect of used container application in vehicle suspension field better.Meanwhile,

The present invention changes the used matter coefficient of used container by the break-make controlling metallic coil, controls simple, is easy to realize.Traditional passive suspension can not only be applied to, can also be used for initiatively or semi-active suspension.

Accompanying drawing explanation

Fig. 1 is the schematic diagram that dual circuit liquid of the present invention is used to container first embodiment.

Fig. 2 is the schematic diagram that dual circuit liquid of the present invention is used to container second embodiment.

Fig. 3 is the structural drawing that dual circuit liquid of the present invention is used to container first embodiment.

In figure:

1-hydraulic cylinder, 2-piston, 3-piston rod, 4-first metal spiral pipeline, 5-switching control pilot, 6-second metal spiral pipeline, 7-hanger.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to this.

The dual circuit liquid of variable used matter coefficient of the present invention is used to container, comprise hydraulic cylinder 1, piston 2, piston rod 3, first metal spiral pipeline 4, second metal spiral pipeline 6, switching control pilot 5, piston 2 is connected with piston rod 3, piston 2 loads in hydraulic cylinder 1, hydraulic cylinder 1 is divided into two chambers, two chamber barrels of hydraulic cylinder 1 have two apertures, first metal spiral pipeline 4, second metal spiral pipeline 6 is connected with an aperture on two chambers respectively, form two independently hydraulic oil circuits, described first metal spiral pipeline 4, switching control pilot 5 is provided with between second metal spiral pipeline 6 and aperture, described first metal spiral pipeline 4, hydraulic oil has been filled in second metal spiral pipeline 6 oil hydraulic cylinder.

Described switching control pilot 5 can select solenoid valve or hydrovalve.Controlled the opening and closing of the first metal spiral pipeline 4, second metal spiral pipeline 6 by control switch control valve 5, realize the change that matter coefficient is used to by used container.Can be divided into and open separately the first metal spiral pipeline 4, open separately the second metal spiral pipeline 6 and the first metal spiral pipeline 4 and the second metal spiral pipeline 6 and open Three models simultaneously, three grades that achieve used container parameters can conditioning technology.Therefore, the dual circuit liquid of variable used matter coefficient provided by the present invention is used to container, can according to the traveling of automobile and condition of road surface, and the parameter of active or passive change self at any time, all can reach best travelling state to make automobile under various operating mode.And, when two metallic coil work simultaneously time, two liquid flywheels turn on the contrary, four conduits that spiral pipeline can be made to extend out form symmetrical structure, eliminate the shearing dynamic stress due to asymmetric generation, avoid used matter coefficient larger time, because liquid body flows, the moment produced causes the vibration displacement amount of pipeline to lag behind load to single-pipeline, the peak value of displacement amount can be greater than dead load peak value, and then produce larger vibration, effectively can eliminate the vibration produced under large used matter coefficient, mechanism is run more steady, thus there is the life-span more of a specified duration.

Described first metal spiral pipeline 4, second metal spiral pipeline 6 be provided with various ways, enumerate following examples and illustrate, but be not limited to following cited embodiment.

Embodiment one:

As shown in Figure 1, the radius of described first metal spiral pipeline 4, second metal spiral pipeline 6 is different, the radius of spin is identical, and is arranged on same cylndrical surface.

If: r ₁the radius of piston 2, r ₂the inside radius of hydraulic cylinder 1, r ₃₁the inside radius of the first metal spiral pipeline 4, r ₃₂the inside radius of the second metal spiral pipeline 6, r ₄be the radius of spiral, h is the pitch of spiral, and n is the number of turns of spiral, and L is the interior length of hydraulic cylinder 1, and ρ is fluid density.

The same with inductance as spring, damper and electric capacity, resistance, used container is also a kind of ideal element, when therefore actual device being abstracted into used container, the factor that some are secondary must be neglected, such as less sliding friction, also as desirable hydraulic damper equipment, should to ignore the quality of piston 2, piston rod 3, hydraulic cylinder 1 and fluid, the idealized process ignoring secondary cause will be done for the present invention equally.

The sectional area A of oil hydraulic cylinder ₁=π (r ₂ ²-r ₁ ²), the sectional area A of the first metal spiral pipeline 4 ₂₁=π r ₃₁ ², the sectional area A of the second metal spiral pipeline 6 ₂₂=π r ₃₂ ².

Liquid gross mass in first metal spiral pipeline 4 approximates:

${{\mathrm{\ρn\πr}}_{31}}^3\sqrt{h^2+{\left(2{\mathrm{\πr}}_4\right)}^2}=m_{hel1}---\left(1\right)$

Liquid gross mass in second metal spiral pipeline 6 approximates:

${{\mathrm{\ρn\πr}}_{32}}^3\sqrt{h^2+{\left(2{\mathrm{\πr}}_4\right)}^2}=m_{hel2}---\left(2\right)$

Liquid gross mass in first metal spiral pipeline 4 and the second metal spiral pipeline 6 approximates:

m _hel＝m _hel1+m _hel2(3)

Liquid gross mass in oil hydraulic cylinder approximates:

ρπ(r ₂ ²-r ₁ ²)L＝m _cy1(4)

Situation for when only making a call to the first metal spiral pipeline 4:

If note x ₁for the linear displacement of piston 2, then the fluid angular displacement in the first metal spiral pipeline 4 approximates:

$\frac{2{\mathrm{\πx}}_1({r_2}^2-{r_1}^2)}{{r_{31}}^2\sqrt{h^2+{\left(2{\mathrm{\πr}}_4\right)}^2}}---\left(5\right)$

In first metal spiral pipeline 4, liquid gross mass approximates m around the moment of inertia of volute axis _hel1r ₄ ²=J ₁.Because the relative acceleration between the inertial force between two-end-point and terminal is proportional.Can obtain:

$\frac{1}{2}{b}_1{{\stackrel{\·}{x}}_1}^2=\frac{1}{2}{J}_1{\stackrel{\·}{\mathrm{\θ}}}^2---\left(6\right)$

Can obtain thus: used matter coefficient $b_1=\frac{m_{hel1}}{1+{\left(\frac{h}{2{\mathrm{\πr}}_4}\right)}^2}\frac{{({r_2}^2-{r_1}^2)}^2}{{r_{31}}^4}=\frac{m_{hel1}}{1+{\left(\frac{h}{2{\mathrm{\πr}}_4}\right)}^2}\left(\frac{A_1}{A_{21}}\right)---\left(7\right).$

Situation for when only opening the second metal spiral pipeline 6:

If note x ₂for the linear displacement of piston 2, then the fluid angular displacement in the second metal spiral pipeline 6 approximates:

$\frac{2{\mathrm{\πx}}_2({r_2}^2-{r_1}^2)}{{r_{32}}^2\sqrt{h^2+{\left(2{\mathrm{\πr}}_4\right)}^2}}---\left(8\right)$

In second metal spiral pipeline 6, liquid gross mass approximates m around the moment of inertia of volute axis _hel2r ₄ ²=J ₂.Because the relative acceleration between the inertial force between two-end-point and terminal is proportional.Can obtain:

$\frac{1}{2}{b}_2{{\stackrel{\·}{x}}_2}^2=\frac{1}{2}{J}_2{\stackrel{\·}{\mathrm{\θ}}}^2---\left(9\right)$

Can obtain thus: used matter coefficient $b_2=\frac{m_{hel2}}{1+{\left(\frac{h}{2{\mathrm{\πr}}_4}\right)}^2}\frac{{({r_2}^2-{r_1}^2)}^2}{{r_{32}}^4}=\frac{m_{hel2}}{1+{\left(\frac{h}{2{\mathrm{\πr}}_4}\right)}^2}\left(\frac{A_1}{A_{22}}\right)---\left(10\right)$

Situation for the first metal spiral pipeline 4 and the second metal spiral pipeline 6 are opened simultaneously:

Here the flow velocity of approximate two pipeline oil is identical,

If note x ₃for the linear displacement of piston 2, then:

In first metal spiral pipeline 4, flow velocity is:

In second metal spiral pipeline 6, flow velocity is

The conclusion synthesizing analysis derived thus and above can obtain:

Used matter coefficient $b_3\′=\frac{4{\mathrm{\π}}^3\mathrm{\ρ}n({r_2}^2-{r_1}^2)(r_{31}+r_{32})}{\sqrt{h^2+{\left(2{\mathrm{\πr}}_4\right)}^2}}---\left(11\right)$

Fig. 3 is used to the concrete arrangement of container for becoming used matter coefficient liquid described in the present embodiment, oil hydraulic cylinder two-end-point is connected with wheel with vehicle body respectively by hanger 7, actual arrangement can be installed jointly with damper, even can be designed as the vibration damper of oil hydraulic cylinder and damper integral type.Four switching control pilot 5 one end are connected with hydraulic cylinder, and the other end is connected with two metallic coil respectively, and can be regulated the used matter coefficient of used container by the break-make of four control valves 5, specific operation are as follows:

Only open the first metal spiral pipeline 4, for the first order is used to matter coefficient, now used matter coefficient is less;

Only open the second metal spiral pipeline 6, for matter coefficient is used in the second level, now used matter coefficient is medium;

First metal spiral pipeline 4, second metal spiral pipeline 6 is opened simultaneously, and for the third level is used to matter coefficient, now used matter coefficient is larger.

Can find out, by regulating the break-make of metal spiral pipeline, can reach and change the used object holding coefficient b, thus realizing the active adjustable control to used container.Switching control pilot 5 is a solenoid valve, adopts ordinary straight type solenoid valve.Metal tubes has advantage that is with low cost, that be easy to production, should not damage, is also easy to realize the variable of used matter coefficient under the prerequisite of increase mechanism within reason complexity compared to the used container of the tradition such as ball screw simultaneously.

When road conditions are severe, when jolting serious, automotive body vibration will obviously aggravate, now, by regulating the break-make of metal spiral pipeline, can realize initiatively controllably increasing the object of being used to container and being used to matter coefficient, make used container can produce larger inertial force, reduce the vibration of vehicle body; On the contrary, under the situation that road conditions are level and smooth, can breaking part valve, used container and suspension rate, resistance of shock absorber are matched, under making whole suspension always work in optimum situation, reaches good riding comfort and driving stability.

Embodiment two:

As shown in Figure 2, the radius of described first metal spiral pipeline 4, second metal spiral pipeline 6 is identical, the radius of spin is different, and is arranged on two concentric cylndrical surface.

If: r ₁the radius of piston 2, r ₂be the inside radius of hydraulic cylinder 1, the radius of the first metal spiral pipeline 4, second metal spiral pipeline 6 is r ₃, r ₄₁the radius of spin of the first metal spiral pipeline 4, r ₄₂be the radius of spin of the second metal spiral pipeline 6, h is the pitch of spiral, and n is the number of turns of spiral, and L is the interior length of hydraulic cylinder 1, and ρ is fluid density.

In the same manner as in Example 1, neglect the factor that some are secondary, and do idealized process.

The sectional area A of oil hydraulic cylinder ₁=π (r ₂ ²-r ₁ ²), the sectional area A of the first metal spiral pipeline 4, second metal spiral pipeline 6 ₂'=π r ₃ ².

Liquid gross mass in first metal spiral pipeline 4 approximates:

${{\mathrm{\ρn\πr}}_3}^3\sqrt{h^2+{\left(2{\mathrm{\πr}}_{41}\right)}^2}=m_{hel1}\′---\left(12\right)$

Liquid gross mass in second metal spiral pipeline 6 approximates:

${{\mathrm{\ρn\πr}}_3}^3\sqrt{h^2+{\left(2{\mathrm{\πr}}_{42}\right)}^2}=m_{hel2}\′---\left(13\right)$

Liquid gross mass in first metal spiral pipeline 4 and the second metal spiral pipeline 6 approximates:

m _hel' _＝m _hel1' ₊m _hel2'(14)

Liquid gross mass in oil hydraulic cylinder approximates:

ρπ(r ₂ ²-r ₁ ²)L＝m _cy1(15)

Situation for when only opening the first metal spiral pipeline 4:

If note x ₁' be the linear displacement of piston 2, then the fluid angular displacement in volute approximates:

$\frac{2{\mathrm{\πx}}_1({r_2}^2-{r_1}^2)}{{r_3}^2\sqrt{h^2+{\left(2{\mathrm{\πr}}_{41}\right)}^2}}---\left(16\right)$

In first metal spiral pipeline 4, liquid gross mass approximates m around the moment of inertia of volute axis _hel1' r ₄₁ ²=J ₁'.Because the relative acceleration between the inertial force between two-end-point and terminal is proportional.Can obtain:

$\frac{1}{2}{b}_1\′{\stackrel{\·}{x}}_1{\′}^2=\frac{1}{2}{J}_1\′\stackrel{\·}{\mathrm{\θ}}{\′}^2---\left(17\right)$

Can obtain thus:

$b_1\′=\frac{m_{hel1}\′}{1+{\left(\frac{h}{2{\mathrm{\πr}}_{41}}\right)}^2}\frac{{({r_2}^2-{r_1}^2)}^2}{{r_3}^4}=\frac{m_{hel1}\′}{1+{\left(\frac{h}{2{\mathrm{\πr}}_{41}}\right)}^2}\left(\frac{A_1}{A_2\′}\right)---\left(18\right)$

Wherein, b ₁' be used matter coefficient.

Situation for when only opening the second metal spiral pipeline 6:

If note x ₂' be the linear displacement of piston 2, then the fluid angular displacement in volute approximates:

$\frac{2{\mathrm{\πx}}_2\′({r_2}^2-{r_1}^2)}{{r_3}^2\sqrt{h^2+{\left(2{\mathrm{\πr}}_{42}\right)}^2}}---\left(19\right)$

In second metal spiral pipeline 6, liquid gross mass approximates m around the moment of inertia of volute axis _hel2' r ₄₂ ²=J ₂'.Because the relative acceleration between the inertial force between two-end-point and terminal is proportional.Can obtain:

$\frac{1}{2}{b}_2\′{\stackrel{\·}{x}}_2{\′}^2=\frac{1}{2}{J}_2{\stackrel{\·}{\mathrm{\θ}}}^2---\left(20\right)$

Can obtain thus:

$b_2\′=\frac{m_{hel2}\′}{1+{\left(\frac{h}{2{\mathrm{\πr}}_{42}}\right)}^2}\frac{{\left({r_2}^2-{r_1}^2\right)}^2}{{r_3}^4}=\frac{m_{hel2}\′}{1+{\left(\frac{h}{2{\mathrm{\πr}}_{42}}\right)}^2}\left(\frac{A_1}{A_2\′}\right)---\left(21\right)$

Wherein, b ₂' be used matter coefficient.

Situation for the first metal spiral pipeline 4 and the second metal spiral pipeline 6 are opened simultaneously:

Here approximate first metal spiral pipeline 4 is identical with the flow velocity of fluid in the second metal spiral pipeline 6,

If note x ₃' be the linear displacement of piston 2, then

Pipe I ' in flow velocity be: $x_A\′=x_3\′\×\frac{r_{41}}{r_{41}+r_{42}},$ In pipe II ', flow velocity is $x_B\′=x_3\′\×\frac{r_{42}}{r_{41}+r_{42}}$

The conclusion synthesizing analysis derived thus and above can obtain:

$b_3\′=4{\mathrm{\π}}^3{\mathrm{\ρnr}}_3\left({r_2}^2-{r_1}^2\right)\[\frac{{r_{41}}^3}{\sqrt{1+{\left(\frac{h}{2{\mathrm{\πr}}_{41}}\right)}^2}}+\frac{{r_{42}}^3}{\sqrt{1+{\left(\frac{h}{2{\mathrm{\πr}}_{42}}\right)}^2}}\]---\left(22\right)$

Wherein, b ₃' be used matter coefficient.

First metallic coil 4 in embodiment one, there is larger space the centre of the second metallic coil 6, damper or oil hydraulic cylinder can be placed, first metallic coil 4 in embodiment two, second metallic coil 6 is arranged on two cylndrical surface, although the interior space in spiral reduces relatively to some extent, but because do not need intercross arrangement two metallic coil, whole height declines to some extent, if required used matter coefficient is larger, still space in larger spiral is had because there being the larger radius of spin, therefore compared to the arrangement of embodiment one, embodiment two is suitable for being used in larger large-scale of required used matter coefficient more, above heavy vehicle.

Described embodiment is preferred embodiment of the present invention; but the present invention is not limited to above-mentioned mode of execution; when not deviating from flesh and blood of the present invention, any apparent improvement that those skilled in the art can make, replacement or modification all belong to protection scope of the present invention.

Claims (7)

1. the dual circuit liquid of a variable used matter coefficient is used to container, it is characterized in that: comprise hydraulic cylinder (1), piston (2), piston rod (3), the first metal spiral pipeline (4), the second metal spiral pipeline (6), switching control pilot (5)

Piston (2) is connected with piston rod (3), piston (2) loads in hydraulic cylinder (1), hydraulic cylinder (1) is divided into two chambers, two chamber barrels of hydraulic cylinder (1) have two apertures, first metal spiral pipeline (4), second metal spiral pipeline (6) is connected with an aperture on two chambers respectively, form two independently hydraulic oil circuits, described first metal spiral pipeline (4), switching control pilot (5) is provided with between second metal spiral pipeline (6) and aperture, described first metal spiral pipeline (4), hydraulic oil has been filled in second metal spiral pipeline (6) oil hydraulic cylinder.

2. dual circuit liquid according to claim 1 is used to container, it is characterized in that: the radius of described first metal spiral pipeline (4), the second metal spiral pipeline (6) is different, the radius of spin is identical, and is arranged on same cylndrical surface.

3. dual circuit liquid according to claim 1 is used to container, it is characterized in that: the radius of described first metal spiral pipeline (4), the second metal spiral pipeline (6) is identical, the radius of spin is different, and be arranged on two concentric cylndrical surface.

4. dual circuit liquid according to claim 1 is used to container, it is characterized in that: the material of the first metal spiral pipeline (4), the second metal spiral pipeline (6) is copper, aluminium or special plastic.

5. dual circuit liquid according to claim 1 is used to container, it is characterized in that: the turning radius of the first metal spiral pipeline (4), the second metal spiral pipeline (6) is far longer than pitch.

6. dual circuit liquid according to claim 1 is used to container, it is characterized in that: hydraulic cylinder (1) radius is far longer than the radius of the first metal spiral pipeline (4), the second metal spiral pipeline (6).

7. dual circuit liquid according to claim 1 is used to container, it is characterized in that: described switching control pilot (5) is solenoid valve or hydrovalve.