CN205934858U - Protection device for be used for high ground water level water delivery channel bottom plate - Google Patents

Abstract

Protection device for be used for high ground water level water delivery channel bottom plate, protector is fixed to be set up in along the vertical domatic bottom of water delivery channel, including shell, check valve and apron, the apron is fixed to be set up in the domatic bottom of water delivery channel, is provided with the hole of permeating water on the apron, the shell is the open casing of one end, and opening end and apron are fixed, form the water storage chamber between apron and shell, install the check valve at the water storage intracavity, the groundwater uniflow is to the water storage chamber, protector's elevation is greater than zero with the depth displacement of water delivery channel bottom plate. After water delivery channel domatic bottom sets up this protector, self -closing and do not increase head loss's effect when having reached the water delivery, the check valve is automatic when ground water level is higher than the channel water level opens, has subductd the uplift pressure that high ground water level produced to the channel bottom plate.

Description

Preventer for phreatic high canal for water conveyance base plate

Technical field

This utility model is related to Hydraulic and Hydro-Power Engineering technical field, is a kind of for groundwater level region canal for water conveyance bottom The preventer of plate.

Background technology

It is in the canal for water conveyance of groundwater level region, water delivery terminates the phenomenon that rear underplate concrete often occurs breakage, former Therefore one be level of ground water be higher than canal for water conveyance water level elevation (elevation refer to certain point arrive absolute datum along plumb line direction Distance, claims absolute elevation, abbreviation elevation.The distance that certain point supposes leveling datum along plumb line direction to certain, claims assumed height), Canal base plate is in the floating support state of subsoil water, and its deadweight irresistibly descends bigcatkin willow pressure to create structural deterioration.

Prior art measure has taken and has added reverse stop valve on channel base plate, can will be higher for canal for water conveyance base plate vicinity Canal for water conveyance is introduced, thus cut down the uplift pressure that water-head brings (building under the uplift pressure effect that the subsoil water of water level produces at it Build the infiltration in thing and its ground, certain level calculated with uplift pressure and the osmotic pressure sum in section) to canal for water conveyance base plate Floating support.But its cope level of reverse stop valve due to being arranged at canal bottom is higher than generally individually canal for water conveyance floor elevation 3-5cm, changes Become the original design size of canal for water conveyance and form, but safeguard procedures are improper in addition and regular maintenance not in time, often free Alluvial clogging, does not have due effect；The reverse stop valve simultaneously exceeding canal for water conveyance base plate also increases channel hydraulic pipeline When the loss of flood peak (loss of flood peak：Current mechanical loss of energy of unit mass liquid in motor process is referred to as the loss of flood peak； The reason produce the loss of flood peak has endogenous cause of ill and two kinds of exopathogenic factor, and the resistance of outer bound pair current is the main exopathogenic factor producing the loss of flood peak, The viscosity of liquid is to produce the major endogeneous of the loss of flood peak, is also basic reason), have impact on the conveyance power of water of channel.

How to be improved using prior art, innovate, reach more effective protection groundwater level region canal for water conveyance The safety and stability of base plate, is contract access point of the present utility model.

Utility model content

For overcoming problems of the prior art, this utility model provides one kind and is used for phreatic high canal for water conveyance The preventer of base plate, can protect the phenomenon destroyed from uplift pressure in groundwater level region canal for water conveyance base plate, not change Become the original design size of canal for water conveyance and form, do not increase canal silting and the loss of flood peak, peace tears simple to operate, easy access dimension open Shield, overcomes the deficiencies in the prior art.

This utility model solves technical problem and is adopted the technical scheme that：This kind is used for phreatic high canal for water conveyance bottom The preventer of plate is fixedly installed on the bottom along canal for water conveyance both sides longitudinal direction side slope, including shell, check valve, cover plate and pre-buried Vertical water-supply-pipe, described cover plate is fixedly installed on the shell opening end of canal for water conveyance side slope bottom, cover plate is provided with permeable hole, Described permeable in the hole is provided with drainage screen, and described drainage screen is installed for single hole or integral installation or packet installation；Described shell is The reserved housing of open at one end, and opening end fixed with cover plate, forms water storage cavity between cover plate and housing；It is provided with water storage intracavity Check valve, when uplift pressure is larger, subsoil water flows into water storage cavity through check valve；It is original design that described preventer does not change canal for water conveyance Size and form, the depth displacement of shell bottom elevation and canal for water conveyance base plate controls between 5cm～10cm.Described pre-buried vertically defeated Water pipe is connected with subsoil water.

Further, the bottom of described check valve is fixed with the vertical filter tube connecting with check valve bottom pyramidal mouth, Described vertical filter tube is connected with the pre-buried vertical water-supply-pipe of outer casing bottom, is provided with filtering bodies in vertical filter tube, described perpendicular It is provided with rubber fastening band to filter tube and pre-buried vertical water-supply-pipe connection screw thread section, bottom linkage section is provided with one layer of watertight rubber Pad.

Further, the cover plate of described preventer is in tilted layout and concordant with canal for water conveyance side slope surface, described cover plate Bottom row permeable hole answers vertical equity arrangement and bottom elevation is flushed with housing bottom elevation.

Further, the valve body of described check valve carry bell, ball valve core, bell top be provided with spacing net, On bell, one layer of rubber blanket is set, during closed check valve state, described spacing net cope level is poor with valve element cope level little In or be equal to valve element radius, during valve element closed mode, valve element fall into bell and with bell on rubber blanket be in close contact.

Further, the valve body of described check valve carries bell, ball valve core, is provided with limiting plate at bell top, Limiting plate center is provided with spacing hole, and limiting plate edge is water flowing net, and during closed check valve state, described limiting plate is away from bell bottom The diameter of the distance between elevation and spacing hole should with valve element fully open when its bottom elevation to bell bottom depth displacement be less than or wait Be to control foundation in the radius of valve element, during valve element closed mode, valve element fall in bell and with its bell on rubber blanket It is in close contact.

Further, the valve body of described check valve carry bell, ball valve core, inside the housing roof be provided with spacing Bar, described gag lever post bottom is provided with trumpet-shaped spacing collar, and the bottom of described spacing collar is just to valve element, closed check valve state When, described spacing collar elevation is less than the radius of valve element with valve element cope level difference, and during valve element closed mode, valve element falls into bell Interior and with bell on rubber blanket be in close contact.

Further, the valve element of described check valve is the hollow rubber spheroid of the proportion that proportion is more than water, has certain bullet Property, described valve element bottom is provided with balancing weight, and the density of balancing weight is more than the density of valve element, and valve element and its bottom arrange balancing weight Deadweight sum should be greater than the proportion 10%～20% of water.

Further, also include the second check valve, described second check valve is connected with pre-buried vertical water-supply-pipe, and second is unidirectional The top of valve element is provided with the cavity of closing, and the cavity of described second check valve passes through the connection of cavity outlet with described check valve Pipe and pre-buried water delivery bend pipe connect, and one end of described communicating pipe is connected with cavity, and the other end is connected with one end of pre-buried water delivery bend pipe Logical, the described other end of pre-buried water delivery bend pipe is connected with the vertical filter tube of check valve and communicates.

Further, described preventer can run according to canal for water conveyance and the needs of maintenance carry out installation or removal dimension Shield is easy and simple to handle, quick.

Further, described cover plate, shell, bell, vertical filter tube, pre-buried vertical water-supply-pipe, spacing net, spacing Plate, gag lever post, communicating pipe and pre-buried water delivery bending component can adopt stainless alloy material or engineering plastics manufacture.

To sum up, the beneficial effect of technique scheme of the present utility model is：

1., after canal for water conveyance both sides face toe is symmetrical arranged some groups of this preventers, check valve can be according to subsoil water Produce the size timely adjustment of uplift pressure, can be automatically switched off or open, cut down the uplift to channel base plate during phreatic high Power.

2. this preventer is arranged at the bottom of channel two side slope, slightly above channel floor elevation, cover plate of outer casing and canal Road side slope be maintained at same domatic on, do not change original design size and the form of channel, it is to avoid block water and channel bottom alluvial Phenomenon causes the blocking to check valve and destruction, enables preventer to keep normal operating conditions, does not increase channel hydraulic pipeline simultaneously When the loss of flood peak.

3. this preventer is arranged on the channel side slopes bottom of inclination and is easy to peace and tears open, safeguard and conventional maintenance.

4. this preventer utilizes tandem principle, and two check valves are cascaded, and its guarantee of work rate is unquestionable.

Brief description

Fig. 1 is installed on the domatic generalized section of canal for water conveyance for this utility model；

Fig. 2 is the partial enlarged drawing of part A in this utility model embodiment one Fig. 1；

Fig. 3 is the partial enlarged drawing of part A in this utility model embodiment two Fig. 1；

Fig. 4 is the partial enlarged drawing of part A in this utility model embodiment three Fig. 1；

Fig. 5 is this utility model perspective view；

Fig. 6 is the first mounting means structural representation of drainage screen in this utility model cover plate；

Fig. 7 is drainage screen second mounting means structural representation in this utility model cover plate；

Fig. 8 is the structural representation of drainage screen in this utility model drainage screen second mounting means；

Fig. 9 is the third mounting means structural representation of drainage screen in this utility model cover plate；

Figure 10 is the structural representation of drainage screen in the third mounting means of this utility model drainage screen；

Figure 11 is the partial enlarged drawing of part A in this utility model example IV Fig. 1；

Figure 12 is this utility model valve core structure schematic diagram；

Figure 13 is this utility model filter structure schematic diagram；

Figure 14 is this utility model second embodiment limiting plate floor map.

In figure：

1 housing, 2 check valves, 21 valve elements, 22 bells, 221 rubber blankets, 23 balancing weights, 24 vertical filter tubes, 241 rubber Waterstop, 242 rubber water-proof pads, 25 filtering bodies, 251 coarse sand granules filter, and 252 one-level non-woven fabrics filter, 253 one-level polyphosphazene polymers Compound filters, and 254 2 grades of non-woven fabrics filter, 255 2 grades of high molecular polymer filtrations, 26 spacing nets, 27 limiting plates, and 271 is spacing Hole, 272 water flowing nets, 28 gag lever posts, 281 spacing collars, 3 cover plates, 31 permeable holes, 32 drainage screens, 4 water storage cavities, 5 canal for water conveyance, 51 Channel side slopes, 52 base plates, 6 hooks, 7 second check valves, 71 second inner elements of check valves, 72 second check valve bells, 721 second Check valve bell rubber blanket, 73 second check valve balancing weights, the vertical filter tube of 74 second check valves, 75 second check valves filter Body, 8 communicating pipes, 9 pre-buried vertical water-supply-pipes, 10 cavitys, 11 pre-buried water delivery bend pipes.

Specific embodiment

Below in conjunction with accompanying drawing 1～14, feature of the present utility model and principle are described in detail, illustrated embodiment is only used In explaining this utility model, not protection domain of the present utility model is limited with this.

As shown in figure 1, the preventer of this utility model design is fixedly installed on along canal for water conveyance 5 length direction channel two The bottom on side slope 51, preventer housing 1 bottom elevation is slightly above canal for water conveyance 5 base plate 52 crest level, and because it is not disposed on On canal for water conveyance 5 canal base plate 52, and do not change the original design size of canal for water conveyance 5 and form, during producing water delivery Block water and phenomenon of depositing, turn avoid normal alluvial on canal for water conveyance 5 canal base plate 52 after water delivery terminates anti-to this simultaneously The adverse effect of protection unit and damage, can reach that during water delivery, described preventer check valve 2 can be in good time automatic according to practical situation Close or open, and do not increase the effect of the loss of flood peak.Bottom symmetrical setting along canal for water conveyance 5 both sides longitudinal direction channel side slopes 51 Some groups, this preventer can be laid using different spacing according to local level of ground water hydrographic data throughout the year, if certain section of water delivery The corresponding throughout the year average subsoil water elevation of channel 5 is higher, can arrange several groups of preventers, if certain section of canal for water conveyance 5 is corresponding more Average subsoil water elevation is relatively low throughout the year, can arrange several groups of preventers less, accomplish to make the best use of everything, decrease in use and bring Unnecessary installation and maintenance time-consuming, also allow for later stage maintenance and engineering cost can be reduced.The bottom of described preventer housing 1 Depth displacement H1 between elevation and canal for water conveyance 5 base plate 52 crest level controls in 5～10cm.

Embodiment one：As shown in Fig. 2, Fig. 5, Figure 12 and Figure 13, this preventer is by housing 1, check valve 2, cover plate 3 and pre- Bury vertical water-supply-pipe 9 grade composition.Described housing 1 be open at one end be arranged on canal for water conveyance 5 both sides channel side slopes 51 bottoms Reserved cavity housing, its opening end can be fixedly connected by the bolt of non-corrosive alloy material with cover plate 3；Described cover plate 3 is square sheet material, is in tilted layout in channel side slopes 51 bottom, the uncovered fixation with housing 1, forms water storage cavity between cover plate 3 and housing 1 4, the size of water storage cavity 4 can design according to actual requirement.Check valve 2 is installed in water storage cavity 4, when produced by subsoil water When uplift pressure is larger, the unidirectional check valve 2 that flows through of subsoil water enters water storage cavity 4.Described pre-buried vertical water-supply-pipe 9 is provided in housing The built-in fitting of 1 bottom, pre-buried vertical water-supply-pipe 9 is connected with subsoil water, and inside it, epimere 5cm is provided with standard thread, is easy to The installation of check valve 2.Described check valve 2 is by ball valve core 21, bell 22, vertical filter tube 24, filtering bodies 25 and spacing net 26 compositions, are integrated members.Bell 22 bottom on described check valve 2 is fixed with vertical filter tube 24, outside it Epimere 5cm is provided with standard connection screw thread, sets one layer of rubber water-proof pad 242 outside hypomere, and inside it, filling filtering bodies 25 (refer to Figure 13), the setting of filtering bodies 25 can avoid subsoil water to bring fine particle in water storage cavity 4 into, enables the lasting holding of check valve 2 Normal operating conditions；What what described vertical filter tube 24 inserted that preventer housing 1 bottom reserves in advance can be connected with subsoil water Pre-buried vertical water-supply-pipe 9, both are rotatably connected on top, arrange rubber fastening band 241 between described screw thread, to ensure what both connected Sealing, prevents leak, sets one layer of rubber water-proof pad 242, effect and rubber fastening band 241 phase outside vertical filter tube 24 hypomere With, and subsoil water can also be stoped to flow between the gap of vertical filter tube 24 outside and pre-buried vertical water-supply-pipe 9 interior side contacts In water storage cavity 4, improve the stability of both connections simultaneously again.The caliber numerical value of pre-buried vertical water-supply-pipe 9 can set according to channel Meter scale, water level and relevant parameter and locality throughout the year average level of ground water hydrographic data determining, vertical filter tube 24 external diameter Less than in pre-buried vertical water-supply-pipe 9, through 2mm, its length controls in 20cm.

The valve body of described check valve 2 is provided with bell 22, ball valve core 21, is fixedly connected spacing net at bell 22 top 26, spacing net 26 can control the Lift of valve element 21, and its structure should ensure that the unimpeded of current, during check valve 2 closed mode, The difference of described spacing net 26 cope level and valve element 21 cope level should be slightly less than the radius of valve element 21.The taper of described bell 22 Section inner side border arranges that a layer thickness is less than the rubber blanket 221 of 5mm, to improve sealing when check valve 2 is closed.Described taper Mouth 22, vertical filter tube 24, spacing net 26, pre-buried vertical water-supply-pipe 9 can be made using engineering plastics, and filtering bodies 25 are from bottom to top Filtering material is：Coarse sand granule filters 251, and one-level non-woven fabrics filter 252, and one-level high molecular polymer filters 253, two grades of non-woven fabrics Filter 254, two grades of high molecular polymers filter 255.The top surface of filtering bodies 25 should apart from closed mode when valve element 21 bottom 5cm Within.

Permeable hole 31 is provided with cover plate 3, drainage screen 32 is installed in permeable hole 31, when channel hydraulic pipeline it is assumed that not having When having under uplift pressure effect, water storage cavity 4 is full of by the permeable hole 31 that water flows through on cover plate 3；The valve element 21 of check valve 2 can by it certainly Overcome buoyancy of water in water storage cavity 4 to be closed again, the valve element 21 of check valve 2 be the proportion that proportion is more than water have one Determine the hollow rubber spheroid of wall thickness, its material should have certain elasticity, reach check valve 2 and be in valve element 21 and taper during closing In mouth 22, rubber blanket 221 contact should be tight, waterproof, and playing to be automatically switched off in channel hydraulic pipeline prevents the effect of seepage.As Fig. 2 Shown, a kind of preferred design, bottom setting balancing weight 23 (referring to Figure 12) within valve element 21, the density of balancing weight 23 Should be greater than valve element 21 density, valve element 21 and its bottom arrange balancing weight 23 deadweight sum should be greater than the proportion 10% of water～ 20%, so can ensure that the steadily of centre of gravity in the anhydrous or water-filled state bottom spool 21 of water storage cavity 4, when check valve 2 is closed Naturally can vertically fall in bell 22 and be in close contact with rubber blanket 221, so that check valve 2 is in stable closed mode. Through equal, its top circle segments diameter control is the 1.7 of valve element 21 diameter with vertical filter tube 24 for bell 22 bottom inner diameter Times～2 times in the range of.

After channel hydraulic pipeline operating mode or water delivery terminate, when level of ground water is higher than water level in channel or higher than canal for water conveyance bottom During plate 52 crest level, now subsoil water enters in water storage cavity 4 through pre-buried vertical water-supply-pipe 9, check valve 2.Detailed process is, if When level of ground water is higher than water level in channel, the uplift pressure that water-head produces is by subsoil water by pre-buried vertical water-supply-pipe 9, vertical mistake Filtering bodies 25 jacking ball valve core 21 in chimney filter 24 and balancing weight 23.When underground bigcatkin willow pressure is more than valve element 21 and balancing weight 23 During deadweight sum, upper shifting departs from bell 22 bottom rubber blanket 221 to subsoil water jacking valve element 21 automatically, and now check valve 2 is in Open mode, subsoil water enters water storage cavity 4 through check valve 2, and the permeable hole 31 then passing through on cover plate 3 flows in channel, thus Reduce the uplift pressure of subsoil water jacking channel base plate 52, protect the safety and stability of channel base plate 52.

Closed mode can accurately be reduced for valve element 21 when making check valve 2 close, valve element 21 when check valve 2 should be controlled to open Floating height, when this requires that check valve 2 is fully open in the presence of subsoil water uplift pressure, its Bottom Altitude is still in cone In shape mouth 22 upper circular segment limit.The setting of spacing net 26 can control the Lift of valve element 21, and non-corrosive used by spacing net 26 Alloy material bolt is fixedly connected on the top of bell 22 upper circular section.Check valve 2 spacing net 26 when being closed Crest level be should be less than or the radius equal to valve element 21 with the discrepancy in elevation of ball valve core 21 crest level, and check valve 2 so can be made to open When valve element 21 bottom be still in the span of control of bell 22 upper circular section so as to can in time, accurately playback protect when closing Demonstrate,prove the accurately and timely of check valve 2 open and close.Spacing net 26 can be made using engineering plastics or rustless alloy material.

Embodiment two：As shown in Fig. 3, Figure 14, from unlike embodiment one, the valve body of described check valve 2 carries taper Mouth 22, valve element 21, vertical filter tube 24, are fixedly connected in bell 22 upper circular section top non-corrosive alloy material bolt Limiting plate 27, limiting plate 27 center is provided with spacing hole 271, and periphery is water flowing net 272 (as shown in figure 14), and shape closed by check valve 2 During state, the diameter of distance away between the elevation of bell bottom for the described limiting plate 27 and spacing hole 271 should with valve element 21 fully open when The radius that its Bottom Altitude is less than or equal to valve element 21 to the bell 22 bottom discrepancy in elevation is to control foundation.The setting of limiting plate 27 with The setting effect of spacing net 26 is identical, will not be described here.Its specific implementation process is, after check valve 2 fully opens, valve element 21 floatings, are limited by spacing hole 271 and stop continuation and float, and the water flowing net 272 that water flows through limiting plate 27 periphery flows into storage Water cavity 4, now valve element 21 bottom still control certain distance following at bell 22 upper circular section top, so can make unidirectional When valve 2 is fully open valve element 21 bottom be still in the span of control of bell 22 upper circular section so as to when closing can in time, Accurately playback it is ensured that check valve 2 open and close accurately and in time.Described limiting plate 27 can adopt engineering plastics or rustless conjunction Golden material is made.

Embodiment three：As shown in figure 4, from unlike embodiment one and embodiment two, the valve body of described check valve 2 carries Bell 22, valve element 21, vertical filter tube 24, are provided with housing 1 inner top wall and can pacify the gag lever post 28 torn open, described spacing Bar 28 bottom is provided with trumpet-shaped spacing collar 281, and the bottom of described spacing collar 281 is just to valve element 21, check valve 2 closed mode When, the difference of described spacing collar 281 elevation and valve element 21 cope level is less than or equal to the radius of valve element 21.Gag lever post 28 and spacing The setting of circle 281 is identical with the setting effect of spacing net 26, will not be described here.Its specific implementation process is, when check valve 2 is complete After entirely opening, valve element 21 floats, and is limited by spacing collar 281 and stops continuation and float, now valve element 21 bottom still controls The following certain distance in bell 22 upper circular section top, when check valve 2 so can be made to open, valve element 21 bottom is still in cone In the span of control of shape mouth 22 upper circular section so as to when closing can in time, accurately playback it is ensured that check valve 2 open and close accurate With timely.Described gag lever post 28 and spacing collar 281 can be made using engineering plastics or rustless alloy material.

For improving guarantee of work rate it is contemplated that this utility model preventer arranges the check valve of two series connection, see enforcement Example four, as shown in figure 11, preventer mainly includes：Housing 1, check valve 2, the second check valve 7, communicating pipe 8, pre-buried vertically defeated Water pipe 9, cavity 10, pre-buried water delivery bend pipe 11, cover plate 3 etc. form.Second check valve 7 is single by the second inner elements of check valve 71, second Vertically filter to valve bell 72, the second check valve bell rubber blanket 721, the second check valve balancing weight 73, the second check valve Pipe 74, the second check valve filtering bodies 75, communicating pipe 8 and cavity 10 form.Described second check valve vertical water-supply-pipe 74 structure with The structure of vertical filter tube 24 of check valve 2 and size all same, the vertical water-supply-pipe of the second check valve 74 insertion housing 1 lower section is right The threaded connection realized with subsoil water of pre-buried vertical water-supply-pipe 9 answered, the water storage cavity of described second check valve 7 setting is one Closed cavity 10, its cavity 10 upper outlet is communicated with pipe 8, and cavity 10 passes through communicating pipe 8 with check valve 2 by pre-buried water delivery Bend pipe 11 is connected, and it is threaded that the vertical filter tube 24 of check valve 2 inserts pre-buried water delivery bend pipe 11, by the second check valve 7 with Check valve 2 is together in series.When level of ground water is higher than water level in channel, produced uplift pressure is more than the second inner elements of check valve 71 During with the second check valve balancing weight 73 weight sum, subsoil water passes through pre-buried vertical water-supply-pipe 9, vertically filters through the second check valve Pipe 74, overcomes the second inner elements of check valve 71 and the deadweight of the second check valve balancing weight 73, now underground in the presence of uplift pressure Water jacking the second inner elements of check valve 71 is automatically upper to move the second check valve cone tank rubber departing from the second check valve bell 72 bottom Rubber cushion 721, the second check valve 7 is opened, and subsoil water flows into the cavity 10 of the second check valve 7, and after cavity 10 is full of, subsoil water is through chamber The communicating pipe 8 of body 10 upper outlet, pre-buried water delivery bend pipe 11, vertical filter tube 24 enter check valve 2, check valve 2 worked Journey illustrates with the first embodiment, and subsoil water enters water storage cavity 4 through check valve 2, and water storage cavity 4 is full of, and then passes through lid Permeable hole 31 on plate 3 flows in channel, thus reducing the uplift pressure of subsoil water jacking channel base plate 52, protects channel bottom The safety and stability of plate 52.Second check valve 7 can control the second inner elements of check valve 71 to open height using the ceiling height of cavity 10 Degree, principle ditto repeats no more.Second check valve 7 is all identical with check valve 2 except the outer other structures of cavity 10 and size, two lists To after valve series connection, the subsoil water uplift pressure that each check valve is obtained is equal, even if a check valve breaks down, another Individual check valve can also ensure normal work, and its advantage is apparent.

Setting drainage screen 32 in permeable hole 31, permeable hole 31 is arranged on described cover plate 3, it is to avoid debris or tiny in channel Grain enters water storage cavity 4 internal blocking check valve 2 it is ensured that the normal work of check valve 2 and the second check valve 7.Cover plate 3 bottom row Permeable hole 31 should be horizontally disposed with and bottom elevation is flushed with housing 1 bottom elevation, can to empty the hydrops in housing 1 when needed. Cover plate 3 is it is contemplated that adopt non-corrosive alloy material, engineering plastics or water penetration concrete material.

Described drainage screen 32 is installed for single hole or integral installation or packet installation.It is illustrated in figure 6 the first of drainage screen 32 Plant mounting means, be mounted on drainage screen 32 in each permeable hole 31, and each permeable hole 31 filtering net 32 is independent, This kind of installation should ensure that installation accuracy.It is the second mounting means of drainage screen 32 as shown in Figure 7 and Figure 8, that is, on whole cover plate 3 Drainage screen 32 in all permeable holes 31 is fixedly connected with together, and the permeable hole 31 that each drainage screen 32 correspondence is installed with it Position, is provided with a hook 6 on whole drainage screen 32, conveniently fetches.This kind of mode is easily installed, and improves installation effectiveness. It is the third mounting means of drainage screen 32 as shown in Figure 9 and Figure 10, that is, several adjacent drainage screens 32 are divided into one group, and often Permeable hole 31 position that individual drainage screen 32 correspondence is installed with it, every group of drainage screen 32 is fixed as one, on every group of drainage screen 32 It is provided with a hook 6, conveniently fetch.This kind of mounting means had both improve installation effectiveness and also ensure that installation accuracy, after being easy to Phase keeps in repair.

In first, second, and third embodiment, such as Fig. 2, Fig. 3 and Fig. 4, when preventer needs maintenance, cover plate 3 is taken Can be taken off check valve 2 after lower to be overhauled.During installation, first embodiment and second embodiment are by vertical for check valve 2 filter tube The threaded rotation of pre-buried vertical water-supply-pipe 9 that 24 insertion housing 1 bottoms are reserved is tightened, then by cover plate 3 with housing 1 outer uncovered use Non-corrosive alloy material bolt be fixedly connected can complete install, convenient and swift it is easy to operation；3rd embodiment is first to install list To valve 2, then gag lever post 28 is installed, cover plate 3 is finally installed.Cover plate 3 be should ensure that after installation is complete and is maintained at channel side slopes 51 In the plane of the same gradient, do not change original design size and the form of channel, it is to avoid produce and block water and phenomenon of depositing.In housing 1 The height of cavity should meet the requirement that can smoothly install check valve 2, and vertical filter tube 24 should be made smoothly to insert pre-buried vertical water delivery It is advisable in pipe 9.

In fourth embodiment after two check valve series connection, as shown in figure 11, during maintenance, the order of dismounting：Cover plate 3 is taken Under, take out check valve 2, pull down be connected to the second check valve 7 cavity 10 outlet and communicating pipe 8 of pre-buried water delivery bend pipe 11 one end, Again the second check valve 7 is taken off and complete to remove work, overhauled according to being actually needed or safeguard.During installation, install second first Check valve 7, is then installed and connected in the communicating pipe 8 of the second check valve 7 cavity 10 outlet and pre-buried water delivery bend pipe 11 one end, installs Check valve 2 and cover plate 3.Be embodied as be：Vertical for second check valve filter tube 74 is inserted reserved pre-buried vertical in housing 1 lower section Water-supply-pipe 9, rotation screw thread is reinforced and is tightened, will be corresponding with check valve 2 with communicating pipe 8 for cavity 10 upper outlet of the second check valve 7 Reserved pre-buried water delivery bend pipe 11 one end connects, and then reserves vertical filter tube 24 side of the being inserted under correspondence of check valve 2 Pre-buried water delivery bend pipe 11 other end rotation screw thread is reinforced and is tightened, and can complete installment work after installing cover plate 3, convenient and swift, easily In operation.

Above-described embodiment is only the description that preferred implementation of the present utility model is carried out, not to this utility model Scope be defined, on the premise of without departing from this utility model design spirit, relevant technical staff in the field is to this practicality New various modifications and improvement, all should expand in protection domain determined by this utility model claims.

Claims (10)

1. be used for phreatic high canal for water conveyance base plate preventer it is characterised in that：Described preventer is fixedly installed on Along the bottom of canal for water conveyance both sides longitudinal direction side slope, including shell, check valve, cover plate and pre-buried vertical water-supply-pipe, described cover plate is solid Surely it is arranged on the shell opening end of canal for water conveyance side slope bottom, cover plate is provided with permeable hole, described permeable in the hole was provided with Filter screen, described drainage screen is installed for single hole or integral installation or packet installation；Described shell is the reserved housing of open at one end, and Opening end is fixed with cover plate, forms water storage cavity between cover plate and housing；In water storage intracavity, check valve is installed, ground when uplift pressure is larger Lower water flows into water storage cavity through check valve；Described preventer does not change the original design size of canal for water conveyance and form, shell bottom elevation And the depth displacement of canal for water conveyance base plate controls between 5cm～10cm；Described pre-buried vertical water-supply-pipe is connected with subsoil water.

2. according to claim 1 be used for phreatic high canal for water conveyance base plate preventer it is characterised in that：Described list It is fixed with the vertical filter tube connecting with check valve bottom pyramidal mouth, described vertical filter tube and outer casing bottom to the bottom of valve Pre-buried vertical water-supply-pipe connect, be provided with filtering bodies in vertical filter tube, described vertical filter tube and pre-buried vertical water-supply-pipe Connection screw thread section is provided with rubber fastening band, and bottom linkage section is provided with one layer of watertight rubber pad.

3. according to claim 1 be used for phreatic high canal for water conveyance base plate preventer it is characterised in that：Described anti- The cover plate of protection unit is in tilted layout and concordant with canal for water conveyance side slope surface, and described cover plate bottom row permeable hole answers vertical equity Arrange and bottom elevation is flushed with housing bottom elevation.

4. according to claim 1 be used for phreatic high canal for water conveyance base plate preventer it is characterised in that：Described list Carry bell, ball valve core to the valve body of valve, be provided with spacing net, one layer of rubber blanket is set on bell at bell top, During closed check valve state, described spacing net cope level is less than or equal to the radius of valve element, valve element with valve element cope level difference During closed mode, valve element is fallen into bell and is in close contact with the rubber blanket on bell.

5. according to claim 1 be used for phreatic high canal for water conveyance base plate preventer it is characterised in that：Described list Carry bell, ball valve core to the valve body of valve, be provided with limiting plate at bell top, limiting plate center is provided with spacing hole, limit Position edges of boards edge is water flowing net, during closed check valve state, distance away between the elevation of bell bottom for the described limiting plate and spacing hole Diameter should with valve element when fully open its bottom elevation to bell bottom depth displacement be less than or equal to valve element radius for control foundation, During valve element closed mode, valve element is fallen in bell and is in close contact with the rubber blanket on its bell.

6. according to claim 1 be used for phreatic high canal for water conveyance base plate preventer it is characterised in that：Described list To valve valve body carry bell, ball valve core, inside the housing roof be provided with gag lever post, described gag lever post bottom is provided with loudspeaker The spacing collar of shape, the bottom of described spacing collar just to valve element, during closed check valve state, described spacing collar elevation and valve element top Portion's depth displacement is less than or equal to the radius of valve element, during valve element closed mode, valve element fall in bell and with bell on rubber Rubber cushion is in close contact.

7. according to claim 1 be used for phreatic high canal for water conveyance base plate preventer it is characterised in that：Described list It is the hollow rubber spheroid of the proportion that proportion is more than water to the valve element of valve, there is certain elasticity, described valve element bottom is provided with counterweight Block, the density of balancing weight is more than the density of valve element, and the deadweight sum of valve element and its bottom setting balancing weight should be greater than the proportion of water 10%～20%.

8. according to claim 1 be used for phreatic high canal for water conveyance base plate preventer it is characterised in that：Also include Second check valve, described second check valve is connected with pre-buried vertical water-supply-pipe, and the top of the second nonreturn valve core is provided with the chamber of closing Body, the cavity of described second check valve is connected by the communicating pipe of cavity outlet and pre-buried water delivery bend pipe with described check valve, One end of described communicating pipe is connected with cavity, and the other end is connected with one end of pre-buried water delivery bend pipe, described pre-buried water delivery bend pipe The other end is connected with the vertical filter tube of check valve and communicates.

9. according to claim 1 be used for phreatic high canal for water conveyance base plate preventer it is characterised in that：Permissible Run according to canal for water conveyance and the needs of maintenance carry out installation or removal maintenance.

10. according to claim 1 be used for phreatic high canal for water conveyance base plate preventer it is characterised in that：Described Cover plate, shell, bell, vertical filter tube, pre-buried vertical water-supply-pipe, spacing net, limiting plate, gag lever post, communicating pipe and pre-buried Water delivery bending component can adopt stainless alloy material or engineering plastics manufacture.