CN105788427A - Lifting device for hydraulics simulation - Google Patents

Abstract

The invention discloses a lifting device for hydraulics simulation, which comprises a pillar, a lifting device and a switch device, wherein the pillar is used for supporting the lifting device; the lifting device is used for quickly lifting a gate through an elastic pull; and the switch device is used for controlling the lifting device to be stopped at a first stopping position and releasing the lifting device to enable the lifting device to lift the gate, and the first stopping position is corresponding to the elastic tensioning state of the lifting device and the closing state of the gate. Through an elastic device and pulleys, lifting power is provided for the gate, the initial gate lifting acceleration is large, the late acceleration is reduced gradually, time consumption for gate lifting is shortened, and operation safety is ensured.

Description

A kind of lifting device for hydraulic analogy

Technical field

The present invention relates to empirical theory technical field, particularly relate to a kind of lifting device for the simulation of hydraulics dam-break bores.

Background technology

China has the country that reservoir dam quantity is maximum now.Reservoir can play the effects such as flood control, irrigation, water supply, generating after building up, also bring certain potential risk simultaneously.Such as, once there is dam break in reservoir dam, the disaster that downstream wide geographic area is caused is destructive often.The mainly impact and the effect of flooding by dam bursting flood of the disaster of dam break causes.Especially, when the dykes and dams of xoncrete structure burst, can be approximately considered is instantaneous bursting, and the dam bursting flood of its formation is more typical and strong.Due to the sudden of Dam Break Problems and complexity, at present to the understanding of dam break also immaturity, carry out dam break physical model experiment and can promote the understanding to Dam Break Problems, grasp to dam bursting flood Evolution Regularity, provide scientific basis for downstream urban flood defence early warning.

In physical model experiment, transient reliability is simulated typically by the mode detaching suddenly gate.The lifting time (speed) of dam break gate should be subject to special concern, because the lifting time of dam break gate directly affects the feasibility of experimental simulation moment dam break condition.A hydraulic research is had to point out, as upstream depth of water h₀Time known, if gate opening time t meets relationship below, it is possible to thinking that the propagation of velocity of wave is only small by the impact of gate opening process, dam break can be regarded as moment:

$t_{op}\≤1.25\sqrt{\frac{h_0}{g}};(g=9.8m/s^2)$

At present, in hydraulic engineering, the hoisting way of conventional gate mainly has men hoisting, mechanical lifting and electric power lifting etc..But the lifting speed of most of gates can not meet above-mentioned relation formula, thus is necessary experiment dam break gate is carried out particular design, with the simulation of satisfied experiment transient reliability condition, it is ensured that the effectiveness of dam-break bores analog result.

Summary of the invention

It is an object of the invention to provide a kind of lifting device for the simulation of hydraulics dam-break bores, the present invention provides the power of gate rising by elastic device and pulley, making the initial acceleration that gate promotes relatively big, later stage acceleration is gradually reduced, and is conducive to shortening the consuming time of gate lifting.The present invention not only eliminates the potential safety hazard using heavy lift gate to bring, so that the lifting device of the present invention is more flexible on arranging；When practical application, if desired for shortening gate opening is consuming time further, can pass through increase elastic device quantity or change the convenient realization of the bigger elastic device of coefficient of elasticity.The present invention makes dam-break bores simulation have more reliability and operability.

According to an aspect of the present invention, a kind of lifting device for the simulation of hydraulics dam-break bores, including: pillar, it is used for supporting described lifting device；Lifting device, for by elastic pulling force fast lifting gate；Switching device, is used for controlling described lifting device and stops at the first stopping position, and discharges this lifting device and make its lift gate；Wherein, described first stops the closed mode of the position elastic tension state corresponding to lifting device and gate.

Wherein, described lifting device includes: elastic device and the first block；Elastic device, its one end is fixing end, and the other end is movable end；First block, its one end is fixed on described elastic device movable end, and the other end connects gate by drag-line.

Wherein, described switching device includes: horizon bar, leverage and the second block；Horizon bar, horizontal through described pillar, it connects described leverage in one end of described pillar side, and be rigidly connected described second block in one end of described pillar opposite side；Leverage, is used for controlling described horizon bar and moves horizontally；Second block, is used for stopping that described first block makes it stop at the first stopping position.

Wherein, described leverage includes: Fang Xin and stock；Fang Xin, it is connected with described horizon bar, and is fixed on pillar sidewall by active connection, it is possible to rotate around described active connection；Stock, is used for controlling described Fang Xin and rotates, and its one end and described Fang Xin are rigidly connected, and the other end is handheld terminal.

Wherein, when rotating described stock, there is rotating in same direction in described Fang Xin under the pulling function of described stock, pulls horizon bar to move horizontally, drives the second block to move horizontally so that described second block departs from described first block.

Wherein, when described second block departs from described first block, described elastic device does contractile motion under the elastic pulling force effect of self, drops to the second stopping position to pull described first block to stop position from described first；Wherein, described second stops the opening of the position elastic shrinkage state corresponding to spring assembly and gate.

Wherein, also including: secondary spring, it is set on described horizon bar, and its one end is fixing with pillar to be connected, and the other end is fixing with described Fang Xin to be connected, for ensureing stability when switching device is closed.

Wherein, also include: cantilever beams, be fixedly installed on described pillar top, be used for supporting multiple fixed pulley.

Wherein, the plurality of fixed pulley includes at least one main fixed pulley and n sub-fixed pulley, n >=1；Described drag-line one end connects described first block through described main fixed pulley, and the other end is divided into n stock section drag-line after n sub-fixed pulley, and described n stock section drag-line connects described gate.

Wherein, the plurality of fixed pulley includes at least one main fixed pulley and n sub-fixed pulley, n >=1；Described drag-line one end connects described first block through described main fixed pulley, and the other end is divided into n stock section drag-line after walking around described n sub-fixed pulley, and described n stock section drag-line is connected with described gate.

Wherein, the height on described cantilever beams distance ground is 2.5:1-3:1 with the proportion of described gate height.

Wherein, also including: multiple draw rings, be arranged on described gate, described drag-line connects described gate by the plurality of draw ring.

Wherein, also including: draw-in groove, the vertical gate both sides that are arranged on, each described draw-in groove is provided with sliding rail, and described gate can vertically be slided up and down by described sliding rail.

Wherein, K, H, z, m, f, L meet following formula:

$\frac{d^{2}z}{{\mathrm{dt}}^2}=(\frac{f}{Lm}-\frac{K}{m})z+(\frac{KH}{m}-\frac{f}{m}-g)$

Wherein, z is function z=z (t) of t, then

$\frac{d^{2}z}{{\mathrm{dt}}^2}=(\frac{f}{Lm}-\frac{K}{m})z\left(t\right)+(\frac{KH}{m}-\frac{f}{m}-g)$

Wherein, K represents the coefficient of elasticity of spring assembly, and H represents the hoisting depth of elastic device, and z represents gate hoisting depth, and m represents gate quality, and f represents that initial frictional, L represent draw-in groove height.

Wherein, if gate promotes time t and meets following formula, then it represents that this gate opening speed can be used for simulating dam-break bores simulation:

$t\≤1.25\sqrt{\frac{h_0}{g}}$

Wherein, h₀Representing the experiment depth of water, take 0.1m, gravity acceleration g takes 9.8m/s², then promoting time t need to less than 0.126s.

Preferably, K=200N/m, H=0.5m, L=0.4m, m=1kg, f=2N are worked as；K=100N/m, H=0.5m, L=0.4m, m=0.5kg, f=2N；K=100N/m, H=0.5m, L=0.2m, m=1kg, f=2N；K=100N/m, H=1m, L=0.4m, m=1kg, f=2N；When each parameter takes values above, it is possible to ensure that gate fully opens when t=0.126s, z=L, namely gate promotes the time less than 0.126s.

Wherein, K=200N/m, H=0.5m, L=0.4m, m=1kg are chosen, f=2N meets the parameter value of hydraulics dam break requirement of experiment and ranges for: K ∈ [200,400], H ∈ [0.5,1], L ∈ (0,0.4], m ∈ (0,1], f ∈ (0,2].

The power that the present invention is risen for gate offer by elastic device and pulley so that the initial acceleration that gate promotes is relatively big, and later stage acceleration is gradually reduced, is conducive to shortening the consuming time of gate lifting.The present invention not only eliminates the potential safety hazard using heavy lift gate to bring, so that the lifting device of the present invention is more flexible on arranging；When practical application, consuming time for shortening gate opening, can pass through increase elastic device quantity or change the elastic device that coefficient of elasticity is bigger, the present invention makes dam-break bores simulation have more reliability and operability.

Accompanying drawing explanation

Fig. 1 is the structural representation of existing gravity type lift gate；

Fig. 2 is the gate hoisting depth of existing gravity type lift gate and the curve chart promoting speed；

Fig. 3 is the structural representation of the experiment original state of the lifting device for dam-break bores simulation of the present invention；

Fig. 4 is the structural representation of the experiment completion status of the lifting device for dam-break bores simulation of the present invention；

Fig. 5 is the gate hoisting depth of the present invention and the curve chart promoting speed；

Accompanying drawing labelling:

10-pillar, 20-lifting device, 21-elastic device, 22-the first block, 30-switching device, 31-horizon bar, 311-secondary spring, 32-leverage, 321-side's core, 322-stock, 33-the second block, 40-cantilever beams, 41-fixed pulley, 50-drag-line, 60-gate, 61-draw ring, 70-draw-in groove.

Detailed description of the invention

For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with detailed description of the invention and with reference to accompanying drawing, the present invention is described in more detail.It should be understood that these descriptions are illustrative of, and it is not intended to limit the scope of the present invention.Additionally, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring idea of the invention.

Fig. 1 is the structural representation of existing gravity type lift gate.

Existing dam break gate is mainly gravity type lift gate.As it is shown in figure 1, be provided above fixed pulley 2 at gate 1, by the steel wire 3 of this fixed pulley 2, weight 4 is connected with gate 1.Before gate 1 is opened, weight 4 is placed in position on gate 1 height；In the moment that gate 1 is opened, weight 4 loses constraint and falls, and is mentioned rapidly by gate 1 by steel wire 3.Below weight 4, lay Sand Bucket 5 buffer unit such as grade, it is achieved thereby that quickly mentioning of gate, increase weight weight and can shorten the consuming time of gate opening.

The mode of existing employing heavy lift gate, topmost shortcoming is the potential safety hazard that weight tenesmus brings.Along with the unlatching of gate 1, the contact area of gate 1 and draw-in groove 6 diminishes, and frictional force also reduces, and gravity is constant, thus in falling process of heavy, acceleration can be increasing, and speed is also increasing, cause that last momentum is very big, it is easy to cause the vibrations of ground and tank.And gate is when promoting, its initial acceleration is relatively small, and later stage acceleration constantly becomes big, is so unfavorable for shortening the consuming time of the fully out water surface of gate.And if think to shorten the consuming time of gate opening further, weight weight need to be strengthened, so can bring bigger potential safety hazard.The mode of existing gravity type lift gate is limited by the size of acceleration of gravity, is actually difficult to shorten further the consuming time of gate opening.

Assuming that gate 1 mass is m, draw-in groove 6 is highly L, and gate 1 hoisting depth changes over as z (t), and weight 4 mass is M, and initial maximum frictional force is f, and acceleration of gravity is g, then the gravity G1=mg of gate 1, the gravity G2=Mg of weight 4.Referring to Fig. 1, equation can be listed below according to Newton's second law:

$Mg-\frac{f(L-z)}{L}-mg=(M+m)\frac{d^{2}z}{{\mathrm{dt}}^2}$

Can obtain after arrangement:

$\frac{d^{2}z}{{\mathrm{dt}}^2}=C_{1}z\left(t\right)+C_2;$

Wherein,

$\left\{\begin{array}{c}{C}_1=f/\left(L\right(M+m\left)\right)\\ C_2=(M-m)/(M+m)*g-f/(M+m)\end{array}\right.;$

First doing the movement of falling object after discharging due to weight 4 again, dropping to after steel wire stretches, weight 4 will with same rate motion with gate 1, it is possible to list the equation of momentum, as the initial condition that above formula solves.If rope is long is l, then have

$M\sqrt{2gl}=(M+m)\frac{dz}{dt}$

Simulating for laboratory dam-break bores, the eigenvalue of each parameter can be taken as m=1kg, M=10kg, L=0.4m, l=0.5m, f=2N, gate hoisting depth and lifting rate curve respectively and see Fig. 2.

Fig. 2 is the gate hoisting depth of existing gravity type lift gate and the curve chart promoting speed, Z represents gate hoisting depth, T represents that gate promotes the time, V represents lifting speed, increasing it can be seen that gate promotes the substantially linear change of speed V T in time, gate height Z change is more and more faster, so being unfavorable for the stopping after gate opening, potential safety hazard is really bigger.

Gravity type lift gate is changed into the opening ways of elastic device lift gate by the lifting device for dam-break bores simulation of the present invention, realizing rising to gate fully opened (range of lift 0.4m) institute's time spent is 0.10s, thus it is believed that the dam break condition of simulation is instantaneous.And while ensureing that gate promotes speed, it is achieved the safety of dam break gate, stability and controllability.

Fig. 3 is the structural representation of the experiment original state of the lifting device for dam-break bores simulation of the present invention.Fig. 4 is the structural representation of the experiment completion status of the lifting device for dam-break bores simulation of the present invention.

As shown in Figure 3,4, the lifting device for dam-break bores simulation of the present invention, including: pillar 10, lifting device 20 and switching device 30.

Concrete, pillar 10, it is used for supporting described lifting device 20.

Here, described pillar 10 is fixedly installed on ground or wallboard.

Lifting device 20, for by elastic pulling force fast lifting gate 60.

Here, the set-up mode of lifting device 20 is not construed as limiting, can by described lifting device 20 along pillar 10 be vertically arranged (such as Fig. 3, the set-up mode of lifting device 20 in 4) or along as described in be obliquely installed along pillar 10, be in tensioning state as long as enabling to lifting device 20 and natural resiliency pulling force fast lifting gate 60 can be passed through.

Switching device 30, is used for controlling described lifting device 20 and stops at the first stopping position, and discharges this lifting device 20 and make its lift gate 60；Wherein, described first stops the closed mode of the position elastic tension state corresponding to lifting device 20 and gate 60.

Further, described lifting device 20 includes: elastic device 21 and the first block 22.

Elastic device 21, its one end is fixing end, and the other end is movable end.Concrete, as shown in Figure 3,4, one end of elastic device 21 is fixedly installed on the bottom of pillar 10, and the other end is movable end.Described elastic device 21 can be spring or other elastic stretching devices.There is because of piano wire higher strength degree and elastic limit, it is preferred that the material of elastic device 21 can be piano wire.

First block 22, its one end is fixed on described elastic device 21 movable end, and the other end connects gate 60 by drag-line 50.Concrete, as shown in Figure 3,4, first block 22 one end is fixed on elastic device 21 movable end, and along with elastic device 21 does telescopic movable, the other end connects gate 60 by drag-line 50.

In the present invention, described first block 22 includes but not limited to iron plate.

Further, described switching device 30 includes: horizon bar 31, leverage 32 and the second block 33.

Horizon bar 31, horizontal through described pillar 10, it connects described leverage 32 in one end of described pillar 10 side, connects described second block 33 in one end of described pillar 10 opposite side.Concrete, described pillar 10 sidewall is provided with smooth two through hole, horizon bar 31 is horizontal through described pillar 10, and the two ends of horizon bar 31 are respectively through said two through hole, horizon bar 31 connects described leverage 32 in one end of described pillar 10 side, and horizon bar 31 connects described second block 33 in one end of described pillar 10 opposite side.

Leverage 32, is used for controlling described horizon bar 31 and moves horizontally.

Further, described leverage 32 includes: side's core 321 and stock 322.

Side's core 321, it is connected with described horizon bar 31, and is fixed on pillar 10 sidewall by active connection, it is possible to rotate around described active connection.

Stock 322, is used for controlling described side's core 321 and rotates, and its one end and described side's core 321 are rigidly connected, and the other end is handheld terminal.

Concrete, as shown in Figure 3,4, when rotating described stock 322, there is rotating in same direction in described side's core 321 under the pulling function of described stock 322, pull horizon bar 31 to move horizontally, drive the second block 33 to move horizontally so that described second block 33 departs from described first block 22.

When described second block 33 departs from described first block 22, described elastic device 21 does contractile motion under the elastic pulling force effect of self, drops to the second stopping position to pull described first block 22 to stop position from described first；Wherein, described second stops the opening of the position elastic shrinkage state corresponding to spring assembly 21 and gate 60.

Here, as long as leverage 32 enables to horizon bar 31, occurred level moves, and then the second block 33 and the first block 22 are departed from, however it is not limited to above-described embodiment that the present invention provides.

Second block 33, is used for stopping that described first block 22 makes it stop at the first stopping position, as it was previously stated, described first stops the closed mode of the position elastic tension state corresponding to lifting device 20 and gate 60.

Concrete, as shown in Figure 3, when gate 60 is closed, now described second block 33 is horizontally set on the height that described first block 22 can be made to be still in the first stopping position, its one end engaged with described first block 22 is unsettled setting, and the other end is rigidly connected with the horizon bar 41 horizontal through described pillar 10.Preferably, the second block 33 has bigger rigidity, and smooths with the first block 22 contact surface.

Fig. 3 is experiment original state, and namely gate promotes front original state.As it is shown on figure 3, when described second block 33 engages with described first block 22, now elastic device 21 is in elastic tension state, and gate 60 is closed.Arrow on the right side of Fig. 3 Elastic device 21 represents the elastic shrinkage direction of pull of elastic device 21, arrow above gate 60 represents the opening direction of gate 60, namely when described second block 33 engages with described first block 22, described elastic device 21 has completed elastic stretching motion under external force, described first block 22 is made to be positioned at the first stopping position, as it was previously stated, this first stopping position is corresponding to the closed mode of spring assembly 23 elastic stretching state and gate 60.

Fig. 4 is that gate promotes completion status.As shown in Figure 4, when described second block 33 departs from described first block 22, elastic device 21 elastic shrinkage, make gate 60 open this state.Namely when described second block 33 separates with described first block 22, described elastic device 21 does elastic shrinkage motion under the elastic pulling force effect of self, pull described first block 22 to stop position from described first and drop to the second stopping position, as it was previously stated, this second stopping position is corresponding to the opening of spring assembly 23 elastic shrinkage state and gate 60.

As shown in Figure 3,4, in an optional embodiment, present invention additionally comprises: secondary spring 311, it is set on described horizon bar 31, its one end at horizon bar 31 PATENT left side via place (owing to horizon bar 31 is horizontal through pillar 10, therefore pillar 10 has two through holes, through hole on the right side of horizon bar 31 PATENT left side via and horizon bar 31) fixing with pillar 10 it is connected, the other end is fixing with described side's core 321 to be connected, for ensureing stability when switching device 30 is closed, namely ensure stability when the first block 22 engages with the second block 33.Concrete, secondary spring 311 is in moderate compression state under normal circumstances, thus the second block 33 is applied the thrust towards the first block 22, it is ensured that when prosthetic external force situation, the second block 33 because of small sample perturbations, the motion of the first block 22 will not occur to depart from.Secondary spring 311, as auxiliary device, is enclosed within horizon bar 41, connection side's core 321 and pillar 10, plays the effect that fixing side's core 321 and stock 322 are not easy in without operation to rock, namely switching device 30 is played Stabilization.

As shown in Figure 3,4, further, in one embodiment, present invention additionally comprises: cantilever beams 40, be fixedly installed on described pillar 10 top, be used for supporting multiple fixed pulley 41.Concrete, the top horizontal of described pillar 10 is provided with cantilever beams 40, and specifically, pillar 10 and cantilever beams 40 are for providing stable stress to support to gate 60, itself and drag-line 50, elastic device 21 complete the conduction of opening force jointly, play the effect stablizing whole lifting device.Pillar 10 and cantilever beams 40, resistance to compression shear behavior is good and rigidity is not susceptible to greatly obvious deformation.

Here, pillar 10 and cantilever beams 40 can be as a whole, or pillar 10 and cantilever beams 40 are connected as one by bolt or other fixed forms.Preferably, the material of described pillar 10 and cantilever beams 40 is steel, and its elastic modelling quantity is more than 170GPa, and the rigidity of structure is big, and in whole operating process, deformation is small ignores.

In the present invention, the arm of cantilever beams 40 extends to above gate 60, it is therefore an objective to be easy to fixed pulley 41 and drag-line 50 is laid.Want to provide enough room for promotion for gate 60 it addition, the height of pillar 10 is arranged.In a preferred embodiment, the described cantilever beams 40 height apart from ground and gate 60 oneself height are than for 2.5:1-3:1.Such as, when gate is 0.3m, the height of cantilever beams 40 can be 0.8m.

Further, in one embodiment, the plurality of fixed pulley 41 includes at least one main fixed pulley and n sub-fixed pulley, n >=1；Described drag-line 50 one end connects described first block 22 through described main fixed pulley, and the other end is divided into n stock section drag-line after n sub-fixed pulley, and described n stock section drag-line connects described gate 60.Concrete, the plurality of fixed pulley 41 is for carrying drag-line 50 and changing the direction of pull of drag-line 50.Drag-line 50 could alter that the direction of pull of drag-line 50 after the plurality of fixed pulley 41, owing to the frictional resistance of fixed pulley 41 is less, therefore can ignoring the fixed pulley 41 impact on total pulling force size, namely think that pulling force only changes direction of pull after passing through fixed pulley 41, its size is constant.

Further, described gate 60 is provided with multiple draw ring 61, and as shown in Figure 3,4, the plurality of draw ring 61 is arranged on above shown gate, and described n stock section drag-line connects described gate 60 by the plurality of draw ring 61.Such as, gate 60 can arranging two draw rings 61, drag-line 50 is connected with gate 60 by said two draw ring 61.

In an optional embodiment, present invention additionally comprises: multiple draw-in grooves 70, vertical gate 60 both sides that are arranged on, each described draw-in groove 70 is provided with sliding rail, and described gate 60 can vertically be slided up and down by described sliding rail.Specifically, as shown in Figure 3,4, the both sides of gate 60 are provided with two draw-in grooves 70, and when gate 60 is closed, draw-in groove 70 can play the effect preventing infiltration.

Below technical scheme is illustrated:

Elastic device 21 promotes power for providing for gate 60, the movable end of elastic device 21 is connected with one end of drag-line 50, the fixing end of elastic device 21 is connected with the bottom of pillar 10, and the movable end of elastic device 21 is connected to the first block 22, rotate clockwise stock 43 by described leverage 40, control described first block 22 and depart from described second block 33, and then regulating gate 60 is opened, in the process, the elastic potential energy of elastic device 21 is converted for the lifting pulling force of gate 60.

Leverage 40 is used for controlling whether starting gate 60, when leverage 40 closes (as shown in Figure 3), first block 22 is blocked in the first stopping position by the second block 33, now two block (first block 22 and the second block 33) engagings, now elastic device 21 keeps maximum tension state, and drag-line 50 does not stress.When leverage 40 opens (as shown in Figure 4), by shifting lever device 40 clockwise, two blocks (first block 22 and the second block 33) are departed from, drag-line 50 is subject to the pulling force effect of elastic device 21, pulling force is delivered to gate 60, thus realizing the lifting of gate 60.

The action principle of leverage 40 is as follows:

When leverage 40 closes, now it is stuck in above the second block 33 with the first block 22 that elastic device 21 movable end is connected, owing to the second block 33 is connected with leverage 40 in the horizontal direction, second block 33 level can detach under leverage 40 acts on, thus disengaging with the first block 22, elastic device 21 is made to start to shrink at acting.Wherein, owing to horizon bar 41 is horizontal through described pillar 10, being ensured the direction of motion level (vertical with elastic device 21 axis) of the second block 33, secondary spring 311 ensure that, when prosthetic external force situation, the second block 33 will not detach the first block 22 because of small sample perturbations.

Realize the operation that leverage 40 is opened, gate 60 promotes, namely the concrete operations that the second block 33 and the first block 22 depart from are: laboratory technician rotates clockwise stock 43 about 30 °, and (Fig. 3 is the stock 43 state when not stirring, Fig. 4 is the state after stock 43 is stirred), drive side's core 42 rotates 30 °, because one end of side's core 42 is connected to horizon bar 41, so, make horizon bar 41 that the horizontal displacement of about 2cm occurs accordingly, thus driving the second block 33 to depart from the first block 22.

As it is shown on figure 3, the process that realizes below gate moment of the present invention opened is introduced.

The realization of gate upwards pulling force: be provided with multiple draw ring 61 on gate 60, gate 60 connects drag-line 50 by the two draw ring 61, drag-line 50 realizes break-in by the fixed pulley 41 above gate 60, the other end of drag-line 50 is connected with elastic device 21 movable end, the fixing end of elastic device 21 is fixed on column 10 bottom, the pulling force of such elastic device 21 is delivered on gate 60 by drag-line 50, is converted to the pulling force of lift gate.

The realization of instantaneous starting gate: when gate 60 is closed, elastic device 21 is in maximum tension state, and switching device 50 closes, and namely the first block 22 engages with the second block 33, and now drag-line 50 does not stress；Moment when shifting lever device 40, first block 22 and the second block 33 depart from, elastic device 21 does work with maximum pull, drag-line 50 stress, the elastic potential energy of elastic device 21 is converted into the kinetic energy of gate 60 by drag-line 50 and fixed pulley 41, so that gate 60 reaches opening at short notice, namely realize instantaneous unlatching.

Gate promotes the guarantee of speed: apply lubricating layer (such as waxing) on the sliding rail that gate 60 and draw-in groove contact with each other, to reduce frictional resistance f when gate 60 promotes.Elastic device 21 ensure that the pulling force much larger than gate gravity and frictional resistance f sum in gate 60 improvement stage.

The guarantee of safety: the application is relative to heavy lift gate, and potential safety hazard is less.Elastic device 21 pulling force reduces with the increase of gate 60 hoisting depth, it is ensured that elastic device 21 does not have unnecessary momentum.The stressed members such as drag-line 50, draw ring 61 all have bigger margin of safety, and the design of stock 32 also ensure that the safe distance of experimenter and elastic device 21.

Wherein, K, H, z, m, f, L meet following formula:

$\frac{d^{2}z}{{\mathrm{dt}}^2}=(\frac{f}{Lm}-\frac{K}{m})z+(\frac{KH}{m}-\frac{f}{m}-g)$

Wherein, z is function z=z (t) of t, then

$\frac{d^{2}z}{{\mathrm{dt}}^2}=(\frac{f}{Lm}-\frac{K}{m})z\left(t\right)+(\frac{KH}{m}-\frac{f}{m}-g)$

Wherein, t represents that gate promotes the time, and K represents the coefficient of elasticity of spring assembly, and H represents the hoisting depth of elastic device, and z represents gate hoisting depth, and m represents gate quality, and f represents that initial frictional, L represent draw-in groove height.

Wherein, if gate promotes time t and meets following formula, then it represents that this gate opening speed can be used for simulating dam-break bores simulation:

$t\≤1.25\sqrt{\frac{h_0}{g}}$

Wherein, h₀Representing the experiment depth of water, take 0.1m, gravity acceleration g takes 9.8m/s², then promoting time t need to less than 0.126s.

Wherein, K=200N/m, H=0.5m, L=0.4m, m=1kg, f=2N are worked as；

K=100N/m, H=0.5m, L=0.4m, m=0.5kg, f=2N；

K=100N/m, H=0.5m, L=0.2m, m=1kg, f=2N；

K=100N/m, H=1m, L=0.4m, m=1kg, f=2N；

When each parameter takes values above, it is possible to ensure that gate fully opens when t=0.126s, z=L, namely gate promotes the time less than 0.126s.

Wherein, choosing K=200N/m, H=0.5m, L=0.4m, m=1kg, f=2N is experiment parameter basis reference, the parameter value meeting requirement of experiment ranges for: K ∈ [200,400], H ∈ [0.5,1], L ∈ (0,0.4], m ∈ (0,1], f ∈ (0,2].

As the coefficient of elasticity K=100N/m of elastic device 21, use two elastic devices 21.

Fig. 5 is the gate hoisting depth of the present invention and the curve chart promoting speed.

Laboratory hydraulics dam-break bores is simulated, takes K=200N/m, H=0.5m, L=0.4m, m=1kg, f=2N, gate hoisting depth and lifting speed and see Fig. 5.As seen from Figure 5, the gate of the present invention promotes speed and changes over first increases and then decreases, gate height changes over first quick and back slow, this is beneficial to the stopping after gate opening, safety is good, and the present invention is compared to gravity type gate opening mode, arrives the consuming time shorter of same height after gate opening.

As mentioned above, describe the lifting device for dam-break bores simulation of the present invention in detail, provided the power of gate rising by elastic device and pulley so that the initial acceleration that gate promotes is bigger, later stage acceleration is gradually reduced, and is conducive to shortening the consuming time of gate lifting.The present invention not only eliminates the potential safety hazard using heavy lift gate to bring, so that the lifting device of the present invention is more flexible on arranging.When practical application, consuming time for shortening gate opening, can pass through increase elastic device quantity or change the elastic device that coefficient of elasticity is bigger, the present invention makes dam-break bores simulation have more reliability and operability.

It should be appreciated that the above-mentioned detailed description of the invention of the present invention is used only for exemplary illustration or explains principles of the invention, and it is not construed as limiting the invention.Therefore, any amendment of making when without departing from the spirit and scope of the present invention, equivalent replacement, improvement etc., should be included within protection scope of the present invention.Additionally, claims of the present invention be intended to fall in the equivalents on scope and border or this scope and border whole change and modifications example.

Claims (16)

1. the lifting device for hydraulic analogy, it is characterised in that including:

Pillar (10), is used for supporting described lifting device (20)；

Lifting device (20), for by elastic pulling force fast lifting gate (60)；

Switching device (30), is used for controlling described lifting device (20) and stops at the first stopping position, and discharges this lifting device (20) and make its lift gate (60)；

Wherein, described first stops the closed mode of the position elastic tension state corresponding to lifting device (20) and gate (60).

2. device according to claim 1, wherein,

Described lifting device (20) including:

Elastic device (21), its one end is fixing end, and the other end is movable end；

First block (22), its one end is fixed on described elastic device (21) movable end, and the other end connects gate (60) by drag-line (50).

3. the device according to any one of claim 1-2, wherein,

Described switching device (30) including:

Horizon bar (31), horizontal through described pillar (10), it connects described leverage (32) in one end of described pillar (10) side, and be rigidly connected described second block (33) in one end of described pillar (10) opposite side；

Leverage (32), is used for controlling described horizon bar (31) and moves horizontally；

Second block (33), is used for stopping that described first block (22) makes it stop at the first stopping position.

4. device according to claim 3, wherein,

Described leverage (32) including:

Fang Xin (321), it is connected with described horizon bar (31), and is fixed on pillar (10) sidewall by active connection, it is possible to rotate around described active connection；

Stock (322), is used for controlling described Fang Xin (321) and rotates, and its one end and described Fang Xin (321) are rigidly connected, and the other end is handheld terminal.

5. device according to claim 4, wherein, when rotating described stock (322), there is rotating in same direction in described Fang Xin (321) under the pulling function of described stock (322), horizon bar (31) is pulled to move horizontally, the second block (33) is driven to move horizontally so that described second block (33) departs from described first block (22).

6. device according to claim 5, wherein, when described second block (33) departs from described first block (22), described elastic device (21) does contractile motion under the elastic pulling force effect of self, drops to the second stopping position to pull described first block (22) to stop position from described first；

Wherein, described second stops the opening of the position elastic shrinkage state corresponding to spring assembly (21) and gate (60).

7. device according to claim 3, wherein, also includes:

Secondary spring (311), it is set on described horizon bar (31), its one end is fixing with pillar (10) to be connected, the other end is fixing with described Fang Xin (321) to be connected, and is used for ensureing stability when switching device (30) is closed.

8. the device according to claim 1-2, any one of 4-7, wherein, also includes:

Cantilever beams (40), is fixedly installed on described pillar (10) top, is used for supporting multiple fixed pulley (41).

9. device according to claim 8, wherein, the plurality of fixed pulley (41) includes at least one main fixed pulley and n sub-fixed pulley, n >=1；

Described drag-line (50) one end connects described first block (22) through described main fixed pulley, and the other end is divided into n stock section drag-line after n sub-fixed pulley, and described n stock section drag-line connects described gate (60).

10. device according to claim 8, wherein, the height on described cantilever beams (40) distance ground is 2.5:1-3:1 with the proportion of described gate (60) height.

11. according to the device described in claim 1-2, any one of 4-7,9-10, wherein, also include:

Multiple draw rings (61), are arranged on described gate (60), and described drag-line (50) connects described gate (60) by the plurality of draw ring (61).

12. according to the device described in claim 1-2, any one of 4-7,9-10, wherein, also include:

Draw-in groove (70), vertical gate (60) both sides that are arranged on, each described draw-in groove (70) is provided with sliding rail, and described gate (60) can vertically be slided up and down by described sliding rail.

13. according to the device described in claim 1-2, any one of 4-7,9-10, wherein, K, H, z, m, f, L meet following formula:

$\frac{d^{2}z}{{\mathrm{dt}}^2}=(\frac{f}{Lm}-\frac{K}{m})z+(\frac{KH}{m}-\frac{f}{m}-g)$

Wherein, z is function z=z (t) of t, then

$\frac{d^{2}z}{{\mathrm{dt}}^2}=(\frac{f}{Lm}-\frac{K}{m})z\left(t\right)+(\frac{KH}{m}-\frac{f}{m}-g)$

Wherein, t represents that gate promotes the time, and K represents the coefficient of elasticity of spring assembly, and H represents the hoisting depth of elastic device, and z represents gate hoisting depth, and m represents gate quality, and f represents that initial frictional, L represent draw-in groove height.

14. device according to claim 13, wherein,

If gate promotes time t meets following formula, then it represents that this gate opening speed can be used for simulating dam-break bores simulation:

$t\≤1.25\sqrt{\frac{h_0}{g}}$

Wherein, h₀Representing the experiment depth of water, take 0.1m, gravity acceleration g takes 9.8m/s², then promoting time t need to less than 0.126s.

15. according to the device described in any one of claim 13-14, wherein,

Work as K=200N/m, H=0.5m, L=0.4m, m=1kg, f=2N；

K=100N/m, H=0.5m, L=0.4m, m=0.5kg, f=2N；

K=100N/m, H=0.5m, L=0.2m, m=1kg, f=2N；

K=100N/m, H=1m, L=0.4m, m=1kg, f=2N；

When each parameter takes values above, it is possible to ensure that gate fully opens when t=0.126s, z=L, namely gate promotes the time less than 0.126s.

16. device according to claim 15, wherein,

Choosing K=200N/m, H=0.5m, L=0.4m, m=1kg, f=2N is experiment parameter basis reference, the parameter value meeting requirement of experiment ranges for: K ∈ [200,400], H ∈ [0.5,1], L ∈ (0,0.4], m ∈ (0,1], f ∈ (0,2].