CN106192931B - A kind of gallery automatic sand discharging device of more sand inlet sequence opening and closings - Google Patents
A kind of gallery automatic sand discharging device of more sand inlet sequence opening and closings Download PDFInfo
- Publication number
- CN106192931B CN106192931B CN201610565063.0A CN201610565063A CN106192931B CN 106192931 B CN106192931 B CN 106192931B CN 201610565063 A CN201610565063 A CN 201610565063A CN 106192931 B CN106192931 B CN 106192931B
- Authority
- CN
- China
- Prior art keywords
- sand
- gallery
- sliding plate
- sand conveying
- inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000004576 sand Substances 0.000 title claims abstract description 242
- 238000007599 discharging Methods 0.000 title claims abstract description 20
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000013049 sediment Substances 0.000 claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 238000011010 flushing procedure Methods 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000003801 milling Methods 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 2
- 238000005406 washing Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
- E02B9/02—Water-ways
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Barrages (AREA)
Abstract
The present invention relates to a kind of gallery automatic sand discharging devices of more sand inlet sequence opening and closings, belong to water project management field, the device include top be equipped with the galleries for sediment transport of multiple sand inlets, the slide plate set below each sand inlet, the triggering component for being fixed below each slide plate the lateral symmetry setting in middle part, driving slide plate along the longitudinally reciprocal haulage gear moved of gallery for sediment transport, positioned at the symmetrically arranged slide plate resetting apparatus in slide plate both sides, outlet lock；Wherein, gallery for sediment transport excavates construction on the riverbed of reservoir dam upstream, and gallery for sediment transport one end is connected with reservoir dam bottom, and by exporting lock across reservoir dam bottom, the other end of gallery for sediment transport is located in reservoir at the end；Quadrangle below slide plate is arranged with idler wheel, and slide plate is moved along gallery for sediment transport is longitudinally reciprocal.Sand inlet sequence is opened and closed when the present apparatus is run, and only there are one sand inlets to open, and ensures there is identical acting head when gallery for sediment transport is opened along each sand inlet of journey, solves distal end sand inlet and hold susceptible to plugging critical issue.
Description
Technical Field
The invention belongs to the technical field of operation management of hydraulic engineering, and particularly relates to an automatic sand discharge device for a gallery with multiple sand inlets opened and closed sequentially.
Background
The development of economy and society is severely restricted by water resource shortage in northwest areas of China. The sand content of the yellow river main branch in northwest region, the inland river in Xinjiang and the like is high, the particle size of silt is coarse, and the method has adverse effect on the effective operation and management of water conservancy engineering facilities such as reservoirs and channels, for example, the yellow river three-gate gorge reservoir generates serious siltation at the initial stage of operation, directly threatens the safety of the Guanzhong plain and only reduces the design function; some small and medium size reservoirs in Xinjiang may lose effectiveness within years; the water diversion channel can also reduce the flow capacity due to silt deposition and the deposited silt to desertify the cultivated land. The historic famous water diversion project 'Zheng national canal' conducts water diversion from the Luo river and the agriculture of irrigation areas develops greatly, so that the Qin nations are strong and unified all over the world, but the 'Zheng national canal' is difficult to find due to silt deposition and burying.
Engineering management, design and research units have been dedicated to research and exploration of reservoir channel silt reduction and dredging measures for a long time, and the sand washing hole and the sand discharge gallery related to the invention are common devices.
Sand washing hole: some reservoirs are provided with sand washing holes for sand discharge, for example, three gorges reservoir is provided with 7 sand washing holes in the main dam section, and an underground power plant dam section is provided with 3 sand washing holes. The inlet elevation of the sand flushing cave is generally higher than the elevation of the initial riverbed and lower than the inlet elevation of a power station or a water diversion port needing protection, as sediment gradually deposits, when the deposited sediment surface approaches the water inlet elevation, the outlet gate is opened to flush the sediment, the initial sand content of the sand flushing water flow is very high, and then the sand flushing flow gradually decreases. The flushing funnel is generally funnel-shaped after flushing, the elevation of the inlet bottom of the sand flushing hole is taken as a starting point, the pre-dam flushing funnel taking the underwater dynamic repose angle as a side slope is formed, and the flushing funnel has a good effect of protecting a water inlet and the like. The sand flushing cave has limited flushing range and has little effect on large-scale flushing and sand discharging, effective storage capacity maintenance of a reservoir and the like.
A sand discharge gallery: the invention patent of Tantaki's patent of self-draining sand gallery, NIOIOO397 OA' proposes a self-draining sand gallery. This patent is arranged by many galleries parallel, and the upper portion order of every gallery sets up a plurality of sand discharge mechanisms, forms netted distribution's sediment outflow hole on the plane, and many galleries adopt unified exit gate centralized control. The patent focuses on the design of the shape and structure of the sand discharge mechanism. The influence of the change of the acting water head of each sand discharging mechanism along with the distance from the outlet gate is not considered, so that the sand discharging mechanism at the far end is gradually silted to influence the sand discharging effect in the running process as the inlet flow of the sand discharging mechanism at the far end from the outlet gate is smaller.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the gallery automatic sand discharging device with multiple sand inlets opened and closed sequentially, when the device is operated, the sand inlets are opened and closed sequentially, only one sand inlet is opened, each sand inlet along the course of the sand conveying gallery is ensured to have the same acting water head, and the key problem that the remote sand inlet is easy to block is solved; the automatic sand discharge by utilizing the drop of the reservoir saves energy, and has simple structure and remarkable economic benefit.
The invention provides an automatic sand discharging device of a corridor with multiple sand inlets opened and closed sequentially, which is characterized by comprising a sand conveying corridor, a sliding plate, triggering members, a traction mechanism, sliding plate resetting devices and an outlet gate, wherein the top of the sand conveying corridor is provided with the multiple sand inlets; the sand conveying gallery is excavated and constructed on an upstream riverbed of the reservoir dam, the downstream end of the sand conveying gallery is connected with the bottom of the reservoir dam, the downstream end of the sand conveying gallery penetrates through the bottom of the reservoir dam through an outlet gate, and the upstream end of the sand conveying gallery is closed and is positioned in the reservoir; the four corners of the lower part of the sliding plate are symmetrically provided with rollers, and the sliding plate longitudinally reciprocates along the sand conveying gallery.
The invention has the characteristics and effects that:
the sliding plate is arranged below the sand inlet of the sand conveying gallery, only one sand inlet of the whole sand conveying gallery is opened by controlling the opening and closing of the sliding plate, the other sand inlets are closed, so that the acting water heads of all the sand inlets are the same when the sand inlets are opened, the inlet flow rates are approximately equal, and the key problem of silting of the sand inlets at the far end of the common gallery is solved. The fall of the reservoir is used for automatic sand discharge, and no additional power is needed; the device has the advantages of simple structure, convenient operation, low operation cost and good social and economic benefits.
Drawings
FIG. 1 is a schematic longitudinal section of the overall arrangement of the device of the present invention.
FIG. 2(a) is a schematic cross-sectional structure of the device of the present invention,
FIG. 2(b) is a schematic view of a longitudinal sectional partial structure of the apparatus of the present invention.
Fig. 3 is a schematic view of the trigger member of the device of the present invention, wherein: FIG. 3(a) is a schematic top view of the triggering member when the sliding plate is located right below the sand inlet and the driving ball is just stuck, and FIG. 3(b) is a schematic top view of the sliding plate when the sliding plate is fully opened and the triggering member releases the driving ball; FIG. 3(c) is a schematic top view and FIG. 3(d) is a schematic side view of the positioning block; fig. 3(e) is a schematic top view and fig. 3(f) is a schematic side view of the telescopic rod.
FIG. 4 is a schematic view of the operating state of the slide block resetting device when the sand inlet is opened from the downstream in sequence, wherein: fig. 4(a) is a schematic view of the working state of the slide block resetting device when the first sand inlet is opened, fig. 4(b) is a schematic view of the working state of the slide block resetting device when the second sand inlet is opened, and fig. 4(c) is a schematic view of the working state of the slide block resetting device when the third sand inlet is opened.
Detailed Description
The automatic sand discharge device for a corridor with multiple sand inlets opened and closed sequentially according to the invention will be described in detail with reference to the accompanying drawings 1-4 and the embodiment. For convenience of description, the length L is defined along the longitudinal direction of the sand conveying gallery 1, the width B is defined along the transverse direction of the cross section of the sand conveying gallery 1, and the height or thickness H is defined vertically upward, and the size of each device number is represented by the characters and the corresponding numerical marks in the drawings, such as the length L1 and the width B1 of the sand conveying gallery 1; and the water flow is divided into upstream and downstream according to the flow direction of the water flow, the water flow flows from the upstream to the downstream, and the water flow faces the downstream and is divided into left and right banks.
The structure of the device is shown in figures 1 and 2, the device comprises a sand conveying gallery 1 (the length L1 and the net width B1 of the sand conveying gallery 1 are determined according to engineering design, if only the dam needs to be desilted, the length is 100m order of magnitude, if the silt needs to be removed to keep the reservoir capacity, the length is 1000m order of magnitude), a sliding plate 4 arranged below each sand inlet 3, triggering members 6 transversely and symmetrically arranged in the middle part below each sliding plate 4, a traction mechanism for driving the sliding plate 4 to longitudinally reciprocate along the sand conveying gallery 1, sliding plate resetting devices symmetrically arranged at two sides of the sliding plate 4 and an outlet gate Valve; wherein, the sand conveying gallery 1 is excavated and built on a riverbed (UB is an upstream riverbed and DB is a downstream riverbed in figure 1) at the upstream of the reservoir Dam, the downstream end of the sand conveying gallery 1 is connected with the Dam bottom of the reservoir Dam, the downstream end passes through the Dam bottom of the reservoir Dam through an outlet gate Valve, the upstream end of the sand conveying gallery 1 is closed and positioned in the reservoir, and sediment is deposited on the top of the sand conveying gallery 1 (DS is the upper surface of the sediment in figure 1); four corners below the sliding plate 4 are symmetrically provided with rollers 11, and the sliding plate 4 longitudinally reciprocates along the sand conveying gallery 1.
The cross section of the sand conveying gallery 1 is a composite section of an upper rectangle, a lower trapezoid or a semicircle, as shown in fig. 2(a) (fig. 2(a) is the cross section of the sand conveying gallery 1 with the lower trapezoid), the shape and the size of the section are unchanged along the longitudinal direction of the sand conveying gallery 1, the longitudinal section of the sand conveying gallery 1 is as shown in fig. 2(b), V in the figure indicates the flowing direction of water flow, and an arrow points to the downstream; the upper surface of a straight cover plate 2 at the top of a sand conveying gallery 1 is flush with the surface of a river bed, two sides of the cover plate 2 protrude out of the side wall of the sand conveying gallery 1 and form a closed sand conveying gallery 1 with a composite section, rectangular sand inlets 3 (length multiplied by width: L3 multiplied by B3) are sequentially arranged on the straight cover plate 2 along the longitudinal direction of the sand conveying gallery at certain intervals (the intervals of the sand inlets are designed according to the sand discharge requirement), and each sand inlet 3 has the same acting water head when opened; a sliding plate 4 is correspondingly arranged below each sand inlet 3, the length of the sliding plate 4 is 1.2 times of the length of the sand inlet 3, and the width of the sliding plate 4 is 1.1 times of the width of the sand inlet 3 (namely, L4 × B4 is 1.2L3 × 1.1B3), so that the sand inlet 3 can be completely sealed, in the embodiment, the width B4 of the sliding plate 4 is 0.95B1, and therefore the width B3 of the sand inlet can be calculated to be 0.86B 1; a plurality of brackets 13 are arranged on two inner side walls of the sand conveying gallery 1 according to a certain distance (the specific size is ensured that the sliding rails 12 do not bend and droop after bearing), the sliding rails 12 are arranged on the brackets 13, and the rollers 11 below the sliding plates 4 move on the sliding rails 12 in a reciprocating manner; positive trigger blocks 7 (the top view is trapezoidal, and the wider side is positioned at the upstream) are arranged on two side walls of the sand conveying gallery 1 at the upstream of each sand inlet 3, and the longitudinal position of each positive trigger block is away from the center of the sand inlet 3 by the length of a sliding plate 4; on both side walls of the sand conveying corridor 1 of each sand inlet 3 are arranged reverse trigger blocks 27 (the size of which is the same as that of the forward trigger block, and the wider side is positioned at the downstream) which are symmetrically arranged with the forward trigger block 7, the longitudinal position of the reverse trigger blocks is positioned at the center of the sand inlet 3, the heights of the two trigger blocks are flush with the trigger member 6, and the width of the wide side is 0.02B 1.
The minimum flow velocity in the sand conveying corridor 1 should be greater than the maximum starting flow velocity V of the siltDThe maximum flow velocity can be 2-3 times of the minimum flow velocity; wherein,g is the acceleration of gravity, D is the silt particle size, and H is the total operating head (i.e. the difference between the upstream water level of the reservoir and the Valve central elevation of the outlet gate).
The traction mechanism comprises two driving balls 5, two traction steel cables 8, four fixed pulleys 9 and a winch 10; wherein, the two driving balls 5 are strictly parallel and are respectively fixed on the two traction steel cables 8; the four fixed pulleys 9 are fixed at two ends of the sand conveying gallery 1 in pairs, and the height of the fixed pulleys is flush with that of the triggering member; the winch 10 is positioned at the top of the Dam; the traction steel cables 8 are positioned at two sides of the sand conveying gallery 1, the traction steel cables 8 firstly pass through a fixed pulley at the downstream end of the sand conveying gallery from a winch 10 at the top of the reservoir dam, sequentially pass through a trigger component below the sliding plate 4, then pass through the fixed pulley at the upstream end of the sand conveying gallery to be folded back, pass through the rollers 11 at four corners of the sliding plate, and then pass back to the winch 10 from the fixed pulley at the downstream end of the sand conveying gallery, and finally the annular traction steel cables 8 which have the same length and pull the driving balls 5 in a reciprocating mode are formed.
The triggering members 6 are transversely and symmetrically fixed at the middle part below each sliding plate 4, the structure of the triggering members is shown in fig. 3 (only the triggering member at one side below the sliding plate is shown in the figure, and the other side is not shown), and the triggering members comprise a positioning block 14, a telescopic rod 17 with a roller 19 and a pressure spring 18; wherein, the positioning block 14 is rectangular and fixed at one side of the middle part below the sliding plate 4, the outer side of the positioning block 14 is retracted into the width of the wide side of the trigger block at the position close to the side wall 21 of the sand conveying gallery and at the position closer to the outer side of the sliding plate 4, an inverted T-shaped groove is transversely milled at the middle part of the upper plane of the positioning block (as shown in 14-1 and 14-2 in figures 3(c) and (d)), the pressure spring 18 is placed in the transverse inner side section 14-1 of the T-shaped groove, the expansion link 17 is placed in the transverse outer side section 14-2 of the T-shaped groove, the rear end of the expansion link 17 abuts against the pressure spring 18, then the upper plane of the positioning block 14 is riveted with the lower plane of the sliding plate, the sliding plate forms a closed cavity with 14-1 and 14-2; one side of the positioning block 14 close to the side wall of the sand flushing gallery 1 is longitudinally and symmetrically provided with conical horn holes 15 (as shown in fig. 3 (c)) with large openings facing outwards, so that the driving balls 5 fixed on the traction steel cables 8 can be guided to smoothly enter the horn holes, the longitudinal inner side of each horn hole 15 is provided with a cylindrical hole 16 which is just used for the driving balls 5 to pass through and is concentric with the horn hole 15, and the diameter of each cylindrical hole 16 is equal to the diameter of a small opening of the horn hole 15; the telescopic rod 17 is an inverted T-shaped structure formed by a transverse inner side section 17-2 and a transverse outer side section 17-3, a rod end (namely an outer side end) close to the side wall 21 of the sand conveying gallery is provided with a groove 19-2 for mounting a roller 19 and a wheel axle hole 17-1 (as shown in figure 3 (e)), the wheel axle 19-1 is inserted into the wheel axle hole 17-1 and then riveted, the middle part of the telescopic rod 17 is provided with a cylindrical hole 20 for just passing the driving ball 5, and the height of the center of the hole is flush with the center of the horn hole 15 of the positioning block 14; the pull cable 8 passes through the flared hole 15 of the positioning block 14, the cylindrical hole 16 and the cylindrical hole 20 in the middle of the telescopic rod 17.
The relative position relationship between the internal components of the trigger component 6 according to the relative position change of the sliding plate 4 and the sand inlet 3 is described as follows:
when the sliding plate 4 is positioned right below the sand inlet 3 (as shown in fig. 3 (a)), the sand inlet 3 is closed, the forward trigger block 7 is positioned at the upstream of the sliding plate 4, the reverse trigger block 27 is longitudinally positioned at the center of the sand inlet, the driving ball 5 enters the bell-mouth 15 of the positioning block 14, the telescopic rod 17 extends towards the direction close to the side wall 21 under the action of the pressure spring 18, but the transverse outer section 17-3 of the telescopic rod abuts against the transverse middle section 14-2 of the T-shaped groove of the positioning block 14 and does not extend outwards continuously; the cylindrical hole 20 in the middle of the telescopic rod 17 and the cylindrical hole 16 in the middle of the positioning block 14 are transversely staggered (the dislocation width is 0.002B4 in the embodiment), the driving ball 5 is clamped, and the sliding plate 4 is pulled in the upstream direction under the action of the traction steel cable 8;
when the sliding plate 4 leaves the sand inlet 3 and is about to be fully opened (as shown in fig. 3 (b)), the outer end roller 19 of the telescopic rod 17 starts to contact the positive trigger block 7, the telescopic rod 17 is gradually retracted and pushes back the pressure spring 18 under the extrusion of the inclined surface of the positive trigger block 7, when the cylindrical hole 20 in the middle of the telescopic rod 17 is aligned with the cylindrical hole 16 of the positioning block 14, the driving ball 5 enters the cylindrical hole 20 (in the embodiment, the gradient of the inclined surface of the forward trigger block 7 is 2:1, the length from the roller 19 at the outer end part of the telescopic rod 17 to the contact of the forward trigger block 7 to the alignment of the cylindrical hole 20 in the middle part of the telescopic rod 17 and the cylindrical hole 16 of the positioning block 14 is 0.004B4), the sliding plate 4 stays at the full-open position of the sand inlet 3, the sand inlet discharges sand (see the position B in figure 1; the sand inlet at the position A finishes discharging sand, a sand discharging funnel is formed at the top, and the sliding plate 4 at the position is reset to the closed position); the pull cable 8 pulls the drive ball 5 to move the next slide 4.
The sliding plate resetting device comprises a plurality of linkage ropes positioned at two sides of the sliding plate and fixed pulleys 22 (shown in figures 2(a) and (b)) which are matched with each linkage rope and fixed at the bottom of the sand conveying gallery cover plate; wherein, two ends of each linkage rope are respectively fixed on two adjacent sliding plates after passing around the fixed pulley 22, and the fixed pulley 22 is positioned at the downstream oblique side of the sand inlet and is 0.5L4 away from the downstream end of the sand inlet; when two adjacent sliding plates are positioned right below the sand inlet to close the two sand inlets, the linkage rope fixed between the two sliding plates is in a loose state.
Fig. 4 illustrates the process of pulling the slide 4 back to the sand inlet 3 closed with the linkage rope:
the linkage ropes 23 are symmetrically arranged on both sides of the slide 4, and only one side is schematically shown, and the other side is not schematically shown. The initial working condition of the device is that all sand inlets 3 of the sand conveying gallery 1 are sealed by sliding plates 4, the driving balls 5 are positioned below the downstream (the left side of a figure 4 (a)) of the first sand inlet 3-1 in front of the reservoir dam, and the driving balls 5 on the two sides are strictly parallel; when the sand discharge is started, the outlet Valve is opened, the winch 10 is started, the traction steel cable 8 pulls the driving ball 5 to move upstream (the right side of the figure 4 (a)), the driving ball 5 is clamped when the first sliding plate 4-1 is reached, the sliding plate 4-1 is pulled to gradually open the sand inlet 3-1, and meanwhile, the linkage rope 23-1 is pulled and the linkage rope 23-2 is pulled tightly by bypassing the fixed pulley 22; when the sliding plate 4-1 reaches the full-open position of the sand inlet 3-1, the linkage rope 23 is also just straightened, the driving ball 5 just passes through the cylindrical hole 20 of the telescopic rod 17 to continue to move, and the sliding plate 4-1 is left at the full-open position of the sand inlet 3-1, as shown in fig. 4 (a); the traction steel cable 8 pulls the driving ball 5 to continuously move upstream, reaches the second sliding plate 4-2 and pulls open the second sliding plate, and the linkage rope 24-1 is synchronously elongated and the linkage rope 24-2 is tensioned; because the first group of linkage ropes 23 are tensioned, when the second sliding plate 4-2 moves upstream, because the length of each linkage rope is unchanged, the linkage ropes 23 are pulled anticlockwise to pull the first sliding plate 4-1 back to the position for closing the first sand inlet 3-1, and the telescopic rod is in an outward extending state under the action of the pressure spring 18, as shown in fig. 4 (b); continuing the same operation, the sand inlet 3-3 is opened, the slide plate 4-2 is pulled back to the position closing the sand inlet 3-2, the linkage rope 23 is restored to the slack state, and the linkage rope 25 is pulled tight, as shown in fig. 4 (c).
The driving ball 5 is pulled by the traction steel cable 8 to move towards the upstream direction of the reservoir, the sand inlets 3 are opened in sequence, only one sand inlet 3 is kept to be opened for sand discharge all the time, and the rest sand inlets 3 are reset and closed under the action of reverse pulling of the linkage rope, so that the key problem that the sand inlets 3 at the far end of the common sand conveying gallery 1 are silted up is solved.
When the driving ball 5 reaches the upstream end of the sand conveying gallery 1 and opens the farthest sand inlet 4, the driving ball 5 passes through the triggering component of the farthest sliding plate 4; a pressure spring 28 (shown in figure 1) is arranged in the lower middle of the upstream end cover plate 2 of the sand conveying gallery 1, and after the triggering component releases the driving ball 5, the pressure spring 28 pushes the sliding plate 4 backwards a small distance, so that the rod end roller of the telescopic rod 17 is separated from the forward triggering block 7, and the telescopic rod 17 returns to an extended state; the winch 10 runs reversely to pull back the driving ball 5, after the driving ball 5 is clamped by the triggering component of the sliding plate 4 at the upstream end of the sand conveying gallery, the sliding plate is pulled back to the position right below the sand inlet 3 at the upstream end of the sand conveying gallery, the reverse triggering block 27 squeezes the telescopic rod 17 at the same time to release the driving ball 5, the sliding plate 4 at the upstream end of the sand conveying gallery stays at the position right below the sand inlet 3 at the upstream end to seal the sliding plate, and the driving ball 5 is pulled further downstream, because the sliding plate 4 is reset, the telescopic rod 17 extends outwards, the cylindrical hole 20 in the middle of the telescopic rod 20 is staggered with the cylindrical hole 16 of the positioning block 14, the driving ball 5 is clamped when being pulled back to the central position of the sand inlet 3, the roller 19 at the outer side end of the telescopic rod 17 also contacts the reverse triggering block 27, the telescopic rod 17 is gradually retracted under the squeezing of the inclined surface of the reverse triggering block 27, when the cylindrical hole 20 in the, the drive balls 5 continue to move downstream through the trigger member and the slide 4 stays further downstream (0.004B4) from the sand inlet 3, and since the slide 4 is 1.2 times longer than the sand inlet 3 (B4-1.2B 3), the further downstream (0.004B4) can also completely close off its corresponding sand inlet 3. The driving balls 5 pass through the triggering components of each sliding plate one by one, and the driving balls 5 finally return to the position in front of the dam to wait for next sand discharge.
The sand discharging time of each sand inlet 3 is determined by the sand discharging effect, and when the sediment deposited above the sand inlet 3 is basically discharged and the sand content of the sand discharging water flow is obviously reduced, the sand is discharged to the next sand inlet 3. The sand discharging time of each sand inlet 3 is approximately the moving time of the driving ball 5 between the two sand inlets 3, and the speed of the winch 10 can be adjusted for control; if the sand discharging time required by a single sand inlet 3 is longer, the driving ball 5 can stay for a certain time when being positioned between two sand inlets 3.
In the embodiment, the upper opening clear width B1 of the sand conveying gallery 1 (figure 2) is 1.6m, the height of the rectangle is 0.7m, the height of the trapezoid is 1.0m, the bottom width is 0.6m, and the water passing area is 2.22m2The flow rate in the sand conveying gallery is 2.50m/s, and the sand discharge flow rate is 5.55m3And/s, the width B3 of the sand inlet 3 is 0.86B1 to 1.38m, the length L3 is 1.6m, and the inlet area of the sand inlet 3 is 2.20m2From this, the size of the slide 4 can be calculated, the width B4 being 1.1B3 being 1.52m and the length L4 being 1.2L3 being 1.92 m. The distance between every two sand inlets 3 is 20m,50 sand inlets are arranged, so that sediment deposited in the range of 1000m in the reservoir can be removed.
The device is suitable for long-strip-shaped reservoirs. If the sand discharge device is synchronously built on the surface of the reservoir bed during reservoir construction, when the thickness of the silt with the designed dead reservoir capacity is 20m, the underwater dynamic angle of repose of the silt is 30 degrees, and the sand is timely discharged at a certain deposition thickness, the effective width of the sand discharge can be maintained at about 70 m.
For a large reservoir, a plurality of independent devices can be arranged in front of a dam, for example, 3 sand washing holes are built in an underground power plant at the right bank of the three gorges, and an inlet gate of the sand washing hole can be used as an outlet gate of the device, so that the aim of continuing sand washing to the depth in the reservoir is fulfilled.
Claims (8)
1. A corridor automatic sand discharging device with a plurality of sand inlets opened and closed sequentially is characterized by comprising a sand conveying corridor, a sliding plate, triggering members, a traction mechanism, sliding plate resetting devices and an outlet gate, wherein the top of the sand conveying corridor is provided with the plurality of sand inlets; the sand conveying gallery is excavated and constructed on an upstream riverbed of the reservoir dam, the downstream end of the sand conveying gallery is connected with the bottom of the reservoir dam, the downstream end of the sand conveying gallery penetrates through the bottom of the reservoir dam through an outlet gate, and the upstream end of the sand conveying gallery is closed and is positioned in the reservoir; the four corners of the lower part of the sliding plate are symmetrically provided with rollers, and the sliding plate longitudinally reciprocates along the sand conveying gallery.
2. The automatic sand discharging device of the corridor with multiple sand inlets opened and closed sequentially as claimed in claim 1, wherein the cross section of the sand conveying corridor is a composite section with a rectangular upper part, a trapezoidal lower part or a semicircular lower part, the top of the sand conveying corridor is a flat cover plate, the upper surface of the flat cover plate is flush with the surface of a river bed, and two sides of the cover plate protrude out of the side walls of the sand conveying corridor; a pressure spring is arranged in the middle of the lower part of the cover plate at the upstream end of the sand conveying gallery; arranging sand inlets on the cover plate along the longitudinal direction of the sand conveying gallery at a certain interval, wherein the sand inlets are rectangular and each sand inlet has the same acting water head when being independently opened; a plurality of brackets are arranged on two side walls in the sand conveying gallery at certain intervals, sliding rails are arranged on the brackets, and rollers at four corners below the sliding plate reciprocate on the sliding rails; the sand conveying gallery comprises a sand inlet, a sand conveying gallery and triggering blocks, wherein the triggering blocks are symmetrically arranged on two side walls of the sand conveying gallery at the upper and lower reaches of each sand inlet, the longitudinal position of the upstream forward triggering block is as long as a sliding plate from the center of the sand inlet, the downstream reverse triggering block is positioned at the center of the sand inlet, and the heights of the triggering blocks are flush with the triggering members.
3. The apparatus according to claim 2, wherein the minimum flow velocity in the sand conveying corridor is greater than the maximum starting flow velocity of the sediment, and the maximum flow velocity is 2-3 times the minimum flow velocity.
4. The automatic sand discharge device for galleries opened and closed by multiple sand inlets in sequence as claimed in claim 1, wherein the sliding plate is rectangular and has a length 1.2 times the length of the sand inlet and a width 1.1 times the width of the sand inlet, so that the sand inlet is completely closed when the sliding plate is located right under the sand inlet.
5. The corridor automatic sand discharging device with multiple sand inlets opened and closed sequentially as claimed in claim 2, wherein the traction mechanism is composed of two driving balls, two traction steel cables, four fixed pulleys and a winch; wherein, the two driving balls are strictly parallel and are respectively fixed on the two traction steel cables; the four fixed pulleys are fixed at two ends of the sand conveying gallery in pairs, and the height of the fixed pulleys is flush with that of the triggering member; the winch is positioned at the top of the reservoir dam; the traction steel cables are positioned at two sides of the sand conveying gallery, pass through the trigger component below the sliding plate in sequence from a winch at the top of the reservoir dam around the fixed pulley at the downstream end of the sand conveying gallery, return back around the fixed pulley at the upstream end of the sand conveying gallery, pass through the rollers at four corners of the sliding plate, and then return to the winch from the fixed pulley at the downstream end of the sand conveying gallery to finally form the annular traction steel cable with the length unchanged and capable of pulling the driving ball in a reciprocating mode.
6. The corridor automatic sediment ejection device with multiple sand inlets opened and closed sequentially as claimed in claim 5, wherein the triggering member comprises a positioning block, a telescopic rod with a roller and a pressure spring; the outer side of the positioning block, which is close to the side wall of the sand conveying gallery, is transversely retracted into the distance of the longer wide edge of the trigger block than the outer side of the sliding plate, a telescopic rod and a pressure spring are placed in a transverse milling groove of the positioning block, the upper plane of the positioning block is riveted with the lower plane of the sliding plate to form a closed cavity formed by the sliding plate and the transverse milling groove of the positioning block, the telescopic rod and the pressure spring slide in the closed cavity, and a conical horn hole with a large opening facing outwards and a cylindrical hole concentric with the horn hole are longitudinally and symmetrically arranged on one side of the positioning block, which is close to the side wall of the sand flushing gallery; the outer side end of the telescopic rod is provided with a groove for mounting a roller and a wheel shaft hole, the rear end of the telescopic rod abuts against the pressure spring, the middle part of the telescopic rod is provided with a cylindrical hole for the traction steel cable and the driving ball to pass through, the diameter of the cylindrical hole is equal to that of the cylindrical hole of the positioning block, the cylindrical hole is consistent in height, the cylindrical hole is transversely staggered with the cylindrical hole of the positioning block under the thrust action of the pressure spring, but the cylindrical hole of the positioning block is concentric under the extrusion of the trigger block, so that the driving ball.
7. The automatic sand discharge device for galleries opened and closed by a plurality of sand inlets in sequence according to claim 1, wherein the sliding plate resetting device comprises a plurality of linkage ropes positioned at two sides of the sliding plate, and fixed pulleys which are matched with each linkage rope and fixed at the bottom of a cover plate of the sand conveying gallery; two ends of each linkage rope are respectively fixed on two adjacent sliding plates after bypassing the fixed pulleys matched with the linkage rope, and the fixed pulleys are positioned on the oblique side of the downstream of the sand inlet; the slide plate resetting device is driven by the traction mechanism to form linkage so as to reset the slide plate.
8. The corridor automatic sediment outflow device with multiple sand inlets opened and closed sequentially as claimed in claim 1, wherein the outlet gate controls the outlet flow of the sediment outflow device to meet the requirement of the designed flow speed in the sand conveying corridor; the timing of opening and closing is selected according to the sand discharge schedule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610565063.0A CN106192931B (en) | 2016-07-18 | 2016-07-18 | A kind of gallery automatic sand discharging device of more sand inlet sequence opening and closings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610565063.0A CN106192931B (en) | 2016-07-18 | 2016-07-18 | A kind of gallery automatic sand discharging device of more sand inlet sequence opening and closings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106192931A CN106192931A (en) | 2016-12-07 |
| CN106192931B true CN106192931B (en) | 2018-06-26 |
Family
ID=57493768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610565063.0A Expired - Fee Related CN106192931B (en) | 2016-07-18 | 2016-07-18 | A kind of gallery automatic sand discharging device of more sand inlet sequence opening and closings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106192931B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112237759A (en) * | 2020-11-23 | 2021-01-19 | 上海勘测设计研究院有限公司 | Sand washing device for sand basin and use method thereof |
| CN112681218B (en) * | 2020-12-10 | 2021-11-30 | 中国水利水电科学研究院 | Forward and reverse scouring dredging method for diversion channel of hydropower station and diversion channel structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT400343B (en) * | 1994-02-16 | 1995-12-27 | Mueller Hans | Screening weir (submerged weir) |
| JPH1060871A (en) * | 1996-08-21 | 1998-03-03 | Koken Boring Mach Co Ltd | Method of dam renewal |
| CN2628583Y (en) * | 2003-07-29 | 2004-07-28 | 谭培根 | Self-removing sand gallery |
| CN105735203A (en) * | 2016-05-04 | 2016-07-06 | 安徽理工大学 | Desilting canal |
-
2016
- 2016-07-18 CN CN201610565063.0A patent/CN106192931B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT400343B (en) * | 1994-02-16 | 1995-12-27 | Mueller Hans | Screening weir (submerged weir) |
| JPH1060871A (en) * | 1996-08-21 | 1998-03-03 | Koken Boring Mach Co Ltd | Method of dam renewal |
| CN2628583Y (en) * | 2003-07-29 | 2004-07-28 | 谭培根 | Self-removing sand gallery |
| CN105735203A (en) * | 2016-05-04 | 2016-07-06 | 安徽理工大学 | Desilting canal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106192931A (en) | 2016-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204174574U (en) | For the gear row structure of mud-rock flow protection | |
| CN205116250U (en) | Sediment removal device of reservoir among hydraulic engineering | |
| CN103882838B (en) | A kind of sand discharge method of low water head river channel hinge powerplant intakes | |
| CN104878829B (en) | Anti-clogging inverted siphon sewage pipe system | |
| WO2014201742A1 (en) | Debris flow drainage trough planning and designing method and application thereof | |
| CN102392429B (en) | Headwork stratified water intaking method for Yellow River diversion irrigation district | |
| EP2464858A2 (en) | Shaft power plant | |
| CN106192931B (en) | A kind of gallery automatic sand discharging device of more sand inlet sequence opening and closings | |
| CN107059818B (en) | Hydrodynamic force auto purification type trash rack system | |
| CN106522177A (en) | Fishway system arranged inside water retaining dam | |
| CN103882839B (en) | A kind of sand flushing system of low water head river channel hinge powerplant intakes | |
| CN102767155B (en) | A kind of reservoir desilting pipe-line system and distribution method thereof | |
| CN202324058U (en) | Double-layered pump and gate layout structure | |
| CN113893584A (en) | Double-layer energy dissipation and sand collection channel and method | |
| CN109853492B (en) | Gate valve pipeline type fish passing method | |
| CN117513260A (en) | Drainage structure combining diversion tunnel, drainage tunnel and vertical shaft type flood drainage tunnel | |
| CN201978546U (en) | Roadway through type underground water precipitation system | |
| Shrestha | Application of hydrosuction sediment removal system (HSRS) on peaking ponds | |
| CN202440787U (en) | Riverway diversion device | |
| CN103614986B (en) | It a kind of is applicable to the pressure free current inlet method that Tailings Dam drains off floodwaters | |
| CN203904944U (en) | Desilting system at water inlets of power station | |
| Auel et al. | Sediment management in the Solis reservoir using a bypass tunnel | |
| CN203904946U (en) | Sediment transport device | |
| CN106013009A (en) | Multi-reverse-slope type stilling pool | |
| CN109853493B (en) | Pump valve pipeline type fish passing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210401 Address after: 101300 915, 9th floor, building 1, yard 7, Yuxi Road, Konggang street, Shunyi District, Beijing Patentee after: Beijing Keyuan Changxu Technology Co.,Ltd. Address before: 100084 No. 1 Tsinghua Yuan, Beijing, Haidian District Patentee before: Wang Xingkui |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221108 Address after: 100000 Room 802, Floor 8, Fangxing Building, Zone 1, No. 30, Xueyuan Road, Haidian District, Beijing Patentee after: BEIJING JIANGYI TECHNOLOGY Co.,Ltd. Address before: 101300 915, 9th floor, building 1, yard 7, Yuxi Road, Konggang street, Shunyi District, Beijing Patentee before: Beijing Keyuan Changxu Technology Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180626 |