CN106234090A - Acid rain preventer with drain valve - Google Patents

Abstract

The present invention relates to the acid rain preventer of a kind of band drain valve, including rain collecting device, rainwater monitor controller, telescope support, motor and awning；Described rainwater monitor controller is connected with motor；Being provided with drain valve on described rain collecting device, described rainwater monitor controller is for detecting the eigenvalue of rainwater in rain collecting device, and sends control signals to motor after generating control signal according to this feature value；Described motor performs corresponding operation after receiving described control signal；Described telescope support is connected with motor；Described awning is fixed on telescope support；When telescope support is opened, awning is opened therewith；When telescope support draws in, awning draws in therewith.The acid rain preventer of the band drain valve of the present invention can detect be acid rain after control electric motor starting telescope support and awning opened, by awning acid rain stopped and reaches to protect soil and the effect of plant below awning.

Description

Acid rain preventer with drain valve

Technical field

The present invention relates to plant protection device technical field, be specifically related to avoid the acid of the potted plant band drain valve suffering acid rain Rain preventer.

Background technology

The formal title of acid rain is for acid deposition. refer to the rain that pH value is less than 5.6.Plant generally soda acid journey to soil Degree and nutritional labeling rely on higher, the most potted plant class plant.And the nutrient potassium in soil, sodium, calcium, magnesium can be caused at acid rain Can discharge, and along with rainwater is leached.So acid rain can make substantial amounts of nutrient in soil by leaching loss, cause soil The wretched insufficiency of Middle nutrition element, so that soil becomes barren, therefore can cause plant growing abnormal even dead.

Therefore to reduce acid rain to plant and the impact of soil, it is necessary to prevent plant from contacting with acid rain.

Summary of the invention

For the deficiencies in the prior art, it is an object of the invention to provide one and can identify acid rain, and acid rain can be prevented The acid rain preventer of the band drain valve of contact potted plant and soil thereof.

For achieving the above object, the present invention is by adopting the following technical scheme that

The acid rain preventer of a kind of band drain valve, including rain collecting device, rainwater monitor controller, telescope support, motor, rain Canopy and the brush that catchments；Described rainwater monitor controller is connected with motor；It is provided with drain valve on described rain collecting device；The described brush bag that catchments Include swipe, brush holder support, bearing and push pedal；Described bearing is fixed on rain collecting device；Described brush holder support is arranged on bearing；Described brush Bar is fixed on brush holder support and is positioned at rain collecting device；Described push pedal is fixed on brush holder support and is positioned at outside rain collecting device；Institute State rainwater monitor controller for detecting the eigenvalue of rainwater in rain collecting device, and after generating control signal according to this feature value Send control signals to motor；Described telescope support is connected with motor, when described motor receives described control signal for opening Signal, telescope support is opened by described electric motor starting；Described awning is fixed on telescope support；When telescope support is opened, rain Canopy is opened therewith；When telescope support draws in, awning draws in therewith.

Preferably, described rain collecting device offers receiving chamber and a discharge opening, and this receiving chamber connects with discharge opening；Described Drain valve includes water pipe and valve；Described water pipe is arranged in discharge opening；Described valve is installed on water pipe removably On.

Preferably, described rain collecting device includes that funnel shaped rain trap and rainwater store, described rainwater store are fixed on The lower end of rain trap；This rain trap is used for collecting rainwater, and the rainwater collected imports in rainwater store；Described bearing is fixed On rain trap；Described swipe fits in rain trap for gathering the sidewall of rainwater.

Preferably, described rainwater store offers receiving chamber and an import, this receiving chamber and inlet communication；Rainwater store Import and funnel shaped rain trap outlet, the rainwater that rain trap is collected passes sequentially through the outlet of this rain trap, rainwater store Import enter described receiving intracavity, the part of described rain collecting device is interspersed in this receiving intracavity.

Preferably, described telescope support includes slide rail, slide block, the first telescopic component, the second telescopic component and transverse bar；Institute State and on slide rail, offer chute；Described slide block is arranged in chute, and this slide block is connected by chain with motor；Described first stretches Assembly is all connected with slide block and transverse bar, this first telescopic component according to the state of slide block between elongation state and contraction state Switching；Described second telescopic component is affixed with described slide rail and transverse bar；The retracted position and first of described second telescopic component The retracted position of telescopic component synchronizes.

Preferably, described first telescopic component includes least one set expansion link group；Each expansion link group includes that two intersections set The expansion link put, and the position intersected is provided with rotating shaft, this rotating shaft is also cross two expansion links so that two expansion link energy Rotate with this rotating shaft.

Preferably, described rainwater monitor controller includes the first acquisition module, the second acquisition module, computing module, judge module And control module；

Produce electromotive force after described first acquisition module and contacting rain water, and this electromotive force is sent to computing module；

Described second acquisition module is used for detecting temperature value and the refractive index of monitored rainwater, and by this temperature value and refraction Rate sends to computing module；

Described computing module calculates the pH value of rainwater according to the electromotive force received, temperature value and refractive index, and sends extremely Control module；

Described control module generates control signal according to the size of pH value, and sends control signals to motor.

Preferably, the pH value of described computing module employing equation below calculating rainwater:

$ln\mathrm{\α}\left(H^{+}\right)=\frac{E-E^0}{KT}+lgR$

$K=\frac{E_2-E_1}{{\mathrm{PH}}_2-{\mathrm{PH}}_1}$

Wherein: E is electromotive force；E⁰For constant；E₂With E₁It is the current potential of the first acquisition module, PH₂With PH₁It it is the first collection mould The pH value of block；T is the temperature of rainwater, and R is the refractive index of rainwater, and ln α (H+) is the pH value of rainwater.

Preferably, described first acquisition module and the second acquisition module are installed in rain collecting device.

Preferably, described control module includes receiver module, judge module, signal generation module and sending module；

Described receiver module is for receiving the pH value that computing module sends；

Whether the pH value that described judge module receives for judging receiver module is less than 5.6；

Described signal generation module for the result that judges according to described judge module as being time, generation opening signal；

Described sending module is for sending described opening signal to motor.

Beneficial effects of the present invention:

Rainwater can be acquired by the acid rain preventer of the band drain valve of the present invention by rain collecting device, then passes through The rainwater gathered is detected by rainwater monitor controller, and enter according to the work of output control motor of detection, if the arriving of detection It is that acid rain can control electric motor starting and telescope support and awning opened, by awning, acid rain is carried out stop and reach to protect under awning Necromancer earth and the effect of plant.By arranging drain valve on rain collecting device, this drain valve can be used for when a pH value detection After complete, the rainwater in rain collecting device is discharged, in order to carry out pH value detection next time.By pacifying on rain collecting device Filling the brush that catchments, by catchmenting, the rainwater on rain collecting device is assembled by brush, thus improves rain collecting device and gather rainwater Speed, and then improve the efficiency of PH detection, it is also possible to avoid the rain collecting device when raindrop are less to gather rainwater relatively difficult Problem.

Accompanying drawing explanation

Fig. 1 is the acid rain protective device structure schematic diagram of a kind of band drain valve in embodiments of the invention；

Fig. 2 is awning and the scheme of installation of telescope support in embodiments of the invention；

Fig. 3 is the structural representation of a kind of rain collecting device in embodiments of the invention；

Fig. 4 is the structural representation brushed that catchments in embodiments of the invention；

Fig. 5 is the module map of rainwater monitor controller in embodiments of the invention；

Fig. 6 is a kind of first acquisition module schematic diagram in embodiments of the invention.

In figure: 1, rain collecting device；10, chamber is accommodated；11, rain trap；12, rainwater store；13, drain valve；131, water pipe； 132, valve；2, rainwater monitor controller；21, the first acquisition module；211, containment vessel；212, the first detection bodies；2121, the first shell Body；2122, the first detection solution；2123, the first electrode cable；213, the second detection bodies；2131, the second housing；2132, second Detection solution；2133, the second electrode cable；22, the second acquisition module；23, computing module；24, control module；241, mould is received Block；242, judge module；243, signal generation module；244, sending module；3, telescope support；31, slide rail；310, chute；32、 Slide block；33, the first telescopic component；331, the first expansion link；332, rotating shaft；34, the second telescopic component；341, the second expansion link； 3411, hollow pipe；35, transverse bar；4, motor；5, awning；6, catchment brush；61, swipe；62, brush holder support；63, bearing；64, push pedal.

Detailed description of the invention

Below, in conjunction with accompanying drawing and detailed description of the invention, the present invention is described further:

With reference to Fig. 1 and Fig. 2, the present invention relates to the acid rain preventer of a kind of band drain valve, including rain collecting device 1, rain Water monitor controller 2, telescope support 3, motor 4, awning 5 and the brush 6 that catchments.Described rainwater monitor controller 2 is connected with motor 4.Described rainwater Monitor controller 2 is for detecting the eigenvalue of rainwater in rain collecting device 1, and will control after generating control signal according to this feature value Signal processed sends to motor 4.This feature value includes the temperature value of rainwater, refractive index or pH value etc..Described control signal can be control Motor 4 processed starts and/or controls the signal that motor 4 cuts out.Described motor 4 performs corresponding after receiving described control signal Operation.Such as motor 4 is when receiving startup control signal, and this motor 4 performs to start operation, i.e. starts working telescope support 3 open.Described telescope support 3 is connected with motor 4, this telescope support 3 by motor 4 control open mode and rounding state it Between switch.Described awning 5 is fixed on telescope support 3.The described brush 6 that catchments is installed on rain collecting device 1.When telescope support 3 When opening, awning 4 is opened therewith.When telescope support 3 draws in, awning 5 draws in therewith.Described awning 5 is used for blocking rain.Generally In the case of, when described rainwater monitor controller 2 detects that rainwater is acid rain, send the control signal starting motor 4, promote motor 4 Telescope support 3 is opened, so that opened by awning 5 by work, it is to avoid acid rain and the soil under awning 5 and plant contact, from And realize protecting plant and the effect of soil.Described rain, 5 are made up of flexible plastics.So awning 5 can be along with telescope support 3 open synchronize is opened with shrinking, is shunk.

With reference to Fig. 3, described rain collecting device 1 offers a receiving chamber 10, and this receiving chamber 10 is used for collecting rainwater.Described rain The part of water monitor controller 2 is interspersed in this receiving chamber 10.Specifically, at least the rainwater parts that rainwater monitor controller 2 detects can be worn It is inserted in receiving chamber 10.In the case of needs have detected whether acid rain, this rain collecting device 1 is positioned over open air.Due to rainwater Harvester 1 is for gathering the rainwater that nature falls, and therefore accommodating chamber 10 is opening towards skyward direction, in order to rainwater falls Enter to accommodate in chamber 10.Concrete described rainwater monitor controller 3 is for accommodating the eigenvalue of rainwater in chamber 10.Described first acquisition module The part of 2 is interspersed in this receiving chamber 10.By accommodate chamber 10 rainwater is collected, in order to rainwater monitor controller 2 preferably with Contacting rain water, improves detection efficiency.

Described rain collecting device 1 includes that funnel shaped rain trap 11 and rainwater store 12, described rainwater store 12 are fixed on The lower end of rain trap 11；This rain trap 11 is used for collecting rainwater, and the rainwater collected imports in rainwater store 12.Concrete Described rainwater monitor controller 3 is for detecting the eigenvalue of rainwater in rainwater store 12.Described rainwater store 12 offers a receiving chamber 10 and import (not shown), this receiving chamber 10 and inlet communication；The import of rainwater store 12 and funnel shaped rain trap 11 Outlet, the rainwater that rain trap 11 is collected passes sequentially through the outlet of this rain trap 11, the import of rainwater store 12 enters described Accommodating in chamber 10, the part of described first acquisition module 2 is interspersed in this receiving chamber 10.

One drain valve 13 is installed in described rainwater store 12；This drain valve 13 can be used for when the detection of pH value complete it After, the rainwater in rain collecting device 1 is discharged, in order to carry out pH value detection next time.Sluicing also offered by described rain collecting device 1 Mouth is not shown, and this receiving chamber 10 connects with discharge opening.Described drain valve 13 includes water pipe 131 and valve 132.Described water pipe 131 Being arranged in discharge opening, so one end of this water pipe 131 is extended outside rainwater store 12.Described valve 132 is with detachably Mode be installed on water pipe on the end stretched out in outside rain collecting device 1.When needing the Water in Rainwater Drainage in rainwater store 12 When going out, valve 132 is taken off from water pipe 131.Or also described valve 132 can be set to electronic valve, work as rainwater When monitor controller 2 sends the control signal starting motor 4, transmission simultaneously is opened the signal of valve 132 and is opened by valve 132.Work as rain When rainwater in water container 12 is drained, valve 132 is closed.

With reference to Fig. 5, described rainwater monitor controller 2 include first acquisition module the 21, second acquisition module 22, computing module 23 and Control module 24.Produce electromotive force after described first acquisition module 21 and contacting rain water, and this electromotive force is sent to calculating mould Block 23.First acquisition module 21 includes measuring electrode and reference electrode, and described measurement electrode is to have hydrion optionally Electrode.Therefore, when being inserted in rainwater to be measured by this first acquisition module 21, corresponding electricity can be produced according to rainwater acid-base value Kinetic potential.Described computing module 23 and control module 24 can be combined to a part of module of single-chip microcomputer.Described second acquisition module 22 Can be temperature sensor and refractometer.

With reference to Fig. 6, described first acquisition module 21 includes containment vessel 211 and the first inspection being installed in containment vessel 211 Survey body 212 and the second detection bodies 213.Offer in described containment vessel 211 for installing described first detection bodies 212 and the second inspection Survey the cavity of body 213.Described first detection bodies 212 includes that the first housing 2121, first detects solution 2122 and the first electrode is led Line 2123.Described first housing 2121 inner hollow.Described first detection liquid 2122 is placed in the first housing 2121.First electricity One end of polar conductor 2123 is immersed in the first detection solution 2122, and the other end sequentially passes through the first housing 2121 and containment vessel 211 and be connected with computing module 23.Measure during described first detection bodies 212 not with contacting rain water to be detected；And the Two detection bodies 213 and contacting rain water to be detected.

Described second detection bodies 213 includes that the second housing 2131, second detects solution 2132 and the second electrode cable 2133. Described second housing 2131 inner hollow.Described second detection liquid 2132 is placed in the second housing 2131.Second electrode cable One end of 2133 is immersed in the second detection solution 2132, the other end sequentially pass through the second housing 2131 and containment vessel 211 and with Computing module 23 connects.

First housing 2121 and the second housing 2131 are made by glass.Described first detection solution 2122 and the second detection Solution 2132 is the Klorvess Liquid that concentration is about 3mol/L, and wherein the first detection solution 2122 accounts in the first housing 2121 The 1 of space, portion 9-1 about 51；Second detection solution 2132 account for the second housing 2131 inner space 1 9-1 about 51.Institute State the first electrode cable 2123 and the second electrode cable 2133 can be silver chloride.

Described second acquisition module 22 is used for detecting temperature value and the refractive index of monitored rainwater, and by this temperature value and folding Rate of penetrating sends to computing module 23.Described computing module 23 calculates rainwater according to the electromotive force received, temperature value and refractive index PH value, and send to control module 24.Described control module 24 generates control signal according to the size of pH value, and control is believed Number send to motor 4.Described second acquisition module 22 can be that refractometer is also known as refractometer.

Described computing module 23 can be computer, and this computing module 23 uses equation below (1) (2) to calculate the PH of rainwater Value:

$ln\mathrm{\α}\left(H^{+}\right)=\frac{E-E^0}{KT}+lgR---\left(1\right)$

$K=\frac{E_2-E_1}{{\mathrm{PH}}_2-{\mathrm{PH}}_1}---\left(2\right)$

Wherein: E is electromotive force；E⁰May be less than or equal to E constant；E₂With E₁It is respectively in the first acquisition module 21 first Detection solution 2122 and the current potential of the second detection solution 2132, PH₂With PH₁It is the first detection solution in the first acquisition module 21 2122 and second pH values detecting solution 2132；T is the temperature of rainwater, and R is the refractive index of rainwater；lnα(H⁺) it is the PH of rainwater Value.The temperature value gathering rainwater by arranging the second acquisition module 22 in rainwater monitor controller 2 can effectively carry with refractive index The degree of accuracy of high rainwater monitor controller 2 detection.LgR represents denary logarithm, ln α (H⁺) represent the logarithm with e as the end.

Described first acquisition module 21 and the second acquisition module 22 are installed in rain collecting device 1.Specifically, this first is adopted Collection module 21 and the second acquisition module 22 are installed in described receiving chamber 10, in order to contacting rain water to be measured.

Include receiver module 241, judge module 242, signal generation module 243 with reference to control module described in Fig. 5 24 and send out Send module 244.Described receiver module 241 is for receiving the pH value that computing module 23 sends.Described judge module 242 is used for judging Whether the pH value that receiver module 241 receives, less than 5.6, if then illustrating that this rainwater is acid rain, needing to open awning, otherwise may be used So that awning need not be opened.Described signal generation module 243 is in time judging the result of 242 as being according to described judge module, raw Become opening signal.Described sending module 244 is for sending described opening signal to motor 4.

Described motor 4 starts after receiving described opening signal, drives described telescope support 3 to open, and then by rain Canopy 5 is opened.When awning has plant 5 times, by the awning 5 of open mode, rainwater can be intercepted, prevent rainwater and plant Thing contacts.

Described telescope support 3 includes slide rail 31, slide block the 32, first telescopic component the 33, second telescopic component 34 and transverse bar 35.Chute 310 is offered on described slide rail 31.Described slide block 32 is arranged in chute 310, and this slide block 32 passes through chain with motor 4 Bar connects.Owing to awning 5 is that the flexiplast with waterproof effect is made, awning 5 can be supported by two telescopic components, keep away Exempt from being deposited on awning 5 of excessive rainfall, thus the ruggedness of awning 5 can be effectively improved.Slide block 32 can be driven to exist by motor 5 Chute 310 slides.Described transverse bar 35 be arranged in parallel with slide rail 31.Described first telescopic component 33 and slide block 32 and transverse bar 35 Being all connected with, this first telescopic component 33 switches between elongation state and contraction state according to the state of slide block 32.With described cunning When block 32 is two, the retracted position to the first telescopic component 33 is described, when two slide blocks 32 are close to each other to contacting with each other State under, this first telescopic component 33 is in full open position, and now the air line distance between transverse bar 35 and slide rail 31 is Greatly；When air line distance between two described slide blocks 32 is gradually increased, this first telescopic component 33 realizes gradually drawing in, now Distance between transverse bar 35 and slide rail 31 is gradually shortened.Described second telescopic component 34 is solid with described slide rail 31 and transverse bar 35 Connect.

Described first telescopic component 33 includes least one set expansion link group；Each expansion link group includes two arranged in a crossed manner One expansion link 331, and the position intersected is provided with rotating shaft 332, this rotating shaft 332, also cross two the first expansion links 331, makes Obtain two the first expansion links 331 to rotate with this rotating shaft 332.When two the first expansion links 331 are centered by rotating shaft 332 During rotation so that the angle between two the first expansion links 331 changes, it is achieved the first telescopic component 33 elongation and shortening. In conjunction with Fig. 1, described expansion link group is two groups, and each expansion link group includes first expansion link 331 of four, arranged in a crossed manner two One expansion link 331 is a pair, and this two couple the first expansion link 331 mutually joins.

The retracted position of described second telescopic component 34 and the retracted position of the first telescopic component 33 synchronize.Described second stretches Contracting assembly 34 includes that two the second expansion links 341, each second expansion link 341 include at least two hollow pipe 3411, and two Hollow pipe 3411 diameter differs, and the hollow pipe 3411 that diameter is little can be interspersed in large-diameter hollow pipe 3411, when there is external force In the case of push-and-pull, the hollow pipe 3411 of minor diameter can be realized and do in the hollow pipe 3411 of major diameter and stretch out or the behaviour of indentation Make, thus realize the second expansion link 341 elongation and shorten.In Fig. 1, each second expansion link 341 includes three hollow pipes 3411.

In conjunction with reference to Fig. 3 and Fig. 4, described in the brush 6 that catchments include swipe 61, brush holder support 62, bearing 63 and push pedal 64.Described bearing 63 are fixed on rain collecting device 1.Described brush holder support 62 is arranged on bearing 63 so that this brush holder support 62 can rotate.Described swipe 61 are fixed on brush holder support 62 and are positioned at rain collecting device 1.Described push pedal 64 is fixed on brush holder support 62 and is positioned at rain collecting device 1 Outside.Specifically: described bearing 63 is fixed on rain trap 11.The through hole of installation bearing 63 can be offered at rain trap 11, make When obtaining brush holder support 21 through bearing, one end of brush holder support 62 is positioned at rain trap 11, and this end is used for installing swipe 61；The other end is positioned at collection Outside rain device 11, this end is used for installing described push pedal 64.Described swipe 61 fits in rain trap 11 for gathering the sidewall of rainwater. It is both secured on described brush holder support 62 by swipe 61 and push pedal 64, described push pedal 64 can be promoted by external force, so that brush holder support 62 and swipe 61 all move, when swipe 61 is moved, this swipe 61 can be swiped the side contacted with swipe 61 on rain collecting device 1 Wall (that is: rain trap 11 is for gathering the sidewall of rainwater), thus realize the rainwater of rain trap 11 from assembling rapidly, and have, and Scrape to rainwater store 12；Especially can accelerate the collection of rainwater when rainwater is less, improve rainwater pH value detection efficiency.Institute State push pedal to be driven by external force such as the thrusts of wind-force or motor.Described swipe 61 can be silica gel, rubber or plastics Making Deng flexible materials, described brush holder support 62 can be that rustless steel is made.Described baffle plate 64 can be that airfast plastics are made.

To sum up, rainwater can be acquired, so by the acid rain preventer of the band drain valve of the present invention by rain collecting device 1 By rainwater monitor controller 2, the rainwater gathered is detected afterwards, and control the work of motor 4 according to the result of detection and enter, if Detection to be that acid rain can control motor 4 and starts and telescope support 3 and awning 5 are opened, by awning 5, acid rain is stopped Reaching to protect soil and the effect of plant below awning 5, by catchmenting, brush 5 coordinates with drain valve 13, both can realize quickly Assemble rainwater, by drain valve 13, Water in Rainwater Drainage can be run out again after detection is complete in case under in subnormal detection once The pH value detection of rainwater.

It will be apparent to those skilled in the art that can technical scheme as described above and design, make other various Corresponding change and deformation, and all these change and deformation all should belong to the protection domain of the claims in the present invention Within.

Claims (10)

1. the acid rain preventer of a band drain valve, it is characterised in that: include rain collecting device, rainwater monitor controller, stretch and prop up Frame, motor, awning and the brush that catchments；Described rainwater monitor controller is connected with motor；It is provided with drain valve on described rain collecting device；Institute State the brush that catchments and include swipe, brush holder support, bearing and push pedal；Described bearing is fixed on rain collecting device；Described brush holder support is arranged in axle Hold；Described swipe is fixed on brush holder support and is positioned at rain collecting device；Described push pedal is fixed on brush holder support and is positioned at rainwater and adopts Outside storage；Described rainwater monitor controller is for detecting the eigenvalue of rainwater in rain collecting device, and is generating according to this feature value Motor is sent control signals to after control signal；Described telescope support is connected with motor, when described motor receives described control Signal processed is opening signal, and described motor starts according to opening signal and opened by telescope support；Described awning is fixed on flexible On support；When telescope support is opened, awning is opened therewith；When telescope support draws in, awning draws in therewith.

The acid rain preventer of band drain valve the most according to claim 1, it is characterised in that: described rain collecting device is offered Having receiving chamber and a discharge opening, this receiving chamber connects with discharge opening；Described drain valve includes water pipe and valve；Described water pipe wears In discharge opening；Described valve is installed on water pipe removably.

The acid rain preventer of band drain valve the most according to claim 1, it is characterised in that: described rain collecting device includes Funnel shaped rain trap and rainwater store, described rainwater store is fixed on the lower end of rain trap；This rain trap is used for collecting rainwater, And the rainwater collected imports in rainwater store；Described bearing is fixed on rain trap；Described swipe fits in rain trap and uses On the sidewall gathering rainwater.

Band the most according to claim 3 catchment brush acid rain guard system, it is characterised in that: described rainwater store offers One accommodates chamber and import, this receiving chamber and inlet communication；The import of rainwater store and funnel shaped rain trap outlet, collect rain The rainwater that device is collected passes sequentially through the outlet of this rain trap, the import of rainwater store enters described receiving intracavity, and described rainwater is adopted The part of storage is interspersed in this receiving intracavity.

The acid rain preventer of band drain valve the most according to claim 1, it is characterised in that: described telescope support includes sliding Rail, slide block, the first telescopic component, the second telescopic component and transverse bar；Chute is offered on described slide rail；Described slide block is arranged on In chute, this slide block is connected by chain with motor；Described first telescopic component is all connected with slide block and transverse bar, and this first is stretched Contracting assembly switches between elongation state and contraction state according to the state of slide block；Described second telescopic component and described slide rail and Transverse bar is affixed；The retracted position of described second telescopic component and the retracted position of the first telescopic component synchronize.

The acid rain preventer of band drain valve the most according to claim 5, it is characterised in that: described first telescopic component bag Include least one set expansion link group；Each expansion link group includes two expansion links arranged in a crossed manner, and is provided with in the position intersected and turns Axle, this rotating shaft is also cross two expansion links so that two expansion links can rotate with this rotating shaft.

7. according to the acid rain preventer of the band drain valve described in any one of claim 1-6, it is characterised in that: described rainwater is supervised Control instrument includes the first acquisition module, the second acquisition module, computing module, judge module and control module；

Produce electromotive force after described first acquisition module and contacting rain water, and this electromotive force is sent to computing module；

Described second acquisition module is for detecting temperature value and the refractive index of monitored rainwater, and this temperature value and refractive index is sent out Deliver to computing module；

Described computing module calculates the pH value of rainwater according to the electromotive force received, temperature value and refractive index, and sends to controlling Module；

Described control module generates control signal according to the size of pH value, and sends control signals to motor.

The acid rain preventer of band drain valve the most according to claim 7, it is characterised in that: described computing module uses such as The pH value of lower formula calculating rainwater:

$ln\mathrm{\α}\left(H^{+}\right)=\frac{E-E^0}{KT}+\lg R$

$K=\frac{E_2-E_1}{{\mathrm{PH}}_2-{\mathrm{PH}}_1}$

Wherein: E is electromotive force；E⁰For constant；E₂With E₁It is the current potential of the first acquisition module, PH₂With PH₁It it is the first acquisition module PH value；T is the temperature of rainwater, and R is the refractive index of rainwater, and ln α (H+) is the pH value of rainwater.

The acid rain preventer of band drain valve the most according to claim 8, it is characterised in that: described first acquisition module and Second acquisition module is installed in rain collecting device.

The acid rain preventer of band drain valve the most according to claim 8, it is characterised in that: described control module includes Receiver module, judge module, signal generation module and sending module；

Described receiver module is for receiving the pH value that computing module sends；

Whether the pH value that described judge module receives for judging receiver module is less than 5.6；

Described signal generation module for the result that judges according to described judge module as being time, generation opening signal；

Described sending module is for sending described opening signal to motor.