CN114370035A - Guide sheet type sand discharge funnel - Google Patents
Guide sheet type sand discharge funnel Download PDFInfo
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- CN114370035A CN114370035A CN202210007651.8A CN202210007651A CN114370035A CN 114370035 A CN114370035 A CN 114370035A CN 202210007651 A CN202210007651 A CN 202210007651A CN 114370035 A CN114370035 A CN 114370035A
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- funnel
- guide vane
- sand discharge
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- 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
- E02B8/02—Sediment base gates; Sand sluices; Structures for retaining arresting waterborne material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/08—Details, e.g. gates, screens
Abstract
The invention relates to the technical field of hydraulic engineering, in particular to a guide vane type sand discharge funnel. The guide vane type sand discharge funnel middle upright column supports the flow regulating suspension plate, and a guide vane is arranged on the upright column. The guide vane changes the flow direction of the high-concentration sand-containing water flow at the bottom of the funnel chamber, and due to the flow guide effect of the guide vane, the motion path of the sand-holding water flow which originally does circular motion along the circumference of the inner side of the upright post and the vicinity of the circumference is changed, and the sand-holding water flow can quickly enter the spiral flow area at the center of the funnel to perform spiral motion under the combined action of the guide vane and the inertia force. Under the action of air vortex, silt in the spiral flow area is not easy to deposit on the bottom plate or escape along with overflow, and only can be discharged from the sand discharge bottom hole. The guide vane type sand discharge funnel reduces the sediment deposition amount of a funnel chamber bottom plate on the inner side of the stand column, improves the bottom hole sand discharge rate, and effectively solves the problems that the sediment deposition of the funnel chamber bottom plate caused by the stand column in the existing sand discharge funnel technology seriously causes the sand cutting rate and the sand discharge rate of the sand discharge funnel engineering along with the increase of the operation time.
Description
Technical Field
The invention relates to the technical field of hydraulic engineering, in particular to a guide vane type sand discharge funnel.
Background
In a sandy river basin in inland regions in the northwest, secondary sand discharge facilities are often required to be built at the upstream of a water diversion main canal, a reservoir and a hydropower station in an irrigation area to pretreat silt so as to reduce the harm of the silt to agricultural production and hydraulic engineering. The sediment discharge funnel (i.e. funnel type full-sand sediment discharge technology) effectively relieves the difficult problem of sediment accumulation in the canal. The sand discharge funnel is widely applied to the fields of hydroelectric generation, river dredging and dredging, river channel dredging and the like due to the good sand interception rate and the low sand discharge and water consumption rate.
The sand discharge funnel is a two-stage sand discharge facility which realizes water-sand separation by utilizing three-dimensional vertical shaft spiral flow. The sand-containing water flow enters the funnel chamber from the tangent direction to the water inlet culvert, the clear water with lower sand content on the surface layer is overflowed through the suspension plate after the cyclone separation, and the sediment sinking to the bottom of the pool is discharged through the sand discharge bottom hole at the center of the funnel chamber. For example, chinese patent document CN1157358A discloses a sand discharge funnel. The sand discharge funnel is provided with a flow regulating suspension plate on the wall of a funnel chamber, and the flow regulating suspension plate is horizontally placed in a fan shape with a central angle of 90-180 degrees. However, engineering practice shows that the flow-regulating suspension plate of the sand discharge funnel is horizontally placed in a fan shape with a central angle of 90-180 degrees, the flow-regulating suspension plate is horizontally arranged, the radial width is in direct proportion to the diameter of the funnel, the area of the suspension plate is large, and the silt falling amount of silt on the flow-regulating suspension plate is far beyond the design load in the operation process, so that the bearing capacity of the structure is not satisfied, inclined-pulling steel wires are broken, and the structure is unstable.
In order to solve the problems of overload and uneven sediment accumulation of sediment on the flow regulating suspension plate, the structure of the sediment discharge hopper is further optimized and designed in the prior art. For example, a sand discharge funnel is disclosed in chinese patent document CN 111270657B. The included angle formed by the connecting line of the near-center end and the far-center end (namely a conical surface bus) of the improved flow regulating suspension plate in the sand discharge funnel and the horizontal plane is more than 0 degree and less than or equal to 45 degrees, and the middle of the whole flow regulating suspension plate is high and the two ends are low. Overflowing water flows through the surface of the improved flow regulating suspension plate only from the lower two ends of the flow regulating suspension plate, the middle area of the surface of the flow regulating suspension plate is not filled with water, the actual water filling width of the improved flow regulating suspension plate is smaller than that of the flow regulating suspension plate, and the wet cycle is far smaller than that of a sand discharge funnel in the prior art. The improved flow-regulating suspension plate has small wet cycle and high flow rate, and is not easy to silt.
However, the sand discharge funnel after the improved flow regulating suspension plate still has defects in engineering practice. For example, when treating a high-concentration, predominantly suspended solids, sand discharge funnel having a large diameter, the width of the flow control flap increases in proportion to the diameter. In order to prevent the suspension plate from collapsing, multiple rows of upright posts are arranged below the flow regulating suspension plate to support the suspension plate in engineering practice so as to ensure the stable structure of the suspension plate. However, a large number of test results show that after the upright columns are additionally arranged, although the stability of the suspension plate is effectively ensured, the phenomena of serious sedimentation at the cone bottom of the funnel chamber, reduction of the sediment discharge rate of the sediment discharge bottom hole and reduction of the sand interception rate of the sediment discharge funnel along with the increase of the operation time occur.
Therefore, optimize the structural style of sediment outflow funnel, effectively solve current sediment outflow funnel technique because of add behind the stand funnel room silt siltation serious and arrange the sediment discharge rate low problem of sediment bottom outlet, improve arrange sand efficiency and become the problem that needs a long time to solve in order to further promote sediment outflow funnel technical application.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the problem that the sediment accumulation of the bottom plate of the sediment discharge funnel chamber is serious after the upright post is additionally arranged, so that the sediment interception rate and the sediment discharge rate of the bottom hole are reduced along with the increase of the operation time of the sediment discharge funnel engineering, the invention provides a technical scheme for optimizing the structure of the sediment discharge funnel, which is concretely as follows.
In order to achieve the purpose, the invention adopts the following scheme: the utility model provides a sediment funnel is arranged to guide vane formula, includes the funnel room, transfers and flows hanging deck, stand and guide vane, transfer and flow the hanging deck and be located the funnel room, the stand forms the support to transferring and flows the hanging deck, the top of stand links to each other with transferring and flow the hanging deck, the bottom of stand links to each other with the funnel room, the guide vane links to each other with the stand. The guide vane and the tangent direction of the concentric circle where the outer diameter of the upright post is located form an included angle.
The guide vane changes the flow direction of the high-concentration sand-containing water flow at the bottom of the funnel chamber, the sand-laden water flow movement path which originally moves along the circumference of the inner side of the upright post and the circumference near the circumference is changed due to the flow guide effect of the guide vane, and the sand-laden water flow can quickly enter a spiral flow area at the center of the funnel to perform spiral movement under the combined action of the guide vane and the inertia force. Under the action of air vortex, silt in the spiral flow area is not easy to deposit on the bottom plate or escape along with overflow, and only can be discharged from the sand discharge bottom hole. The guide vane type sand discharge funnel reduces the sediment deposition amount of the bottom plate of the funnel chamber on the inner side of the stand column, and improves the sand discharge rate of the bottom hole.
Preferably, one side of the guide vane close to the center of the funnel chamber is in a plane or arc surface shape, and one side of the guide vane far away from the center of the funnel chamber is in a plane or arc surface shape.
Preferably, the upright columns are distributed in an arc shape along the axis of the sand discharge bottom hole, and the guide vanes are connected with the upright columns. The guide vane at the bottom end of the upright post changes the motion path of the sand-laden water flow which does circular motion along the circumference of the inner side of the upright post and the vicinity thereof, the sand-laden water flow rapidly enters the spiral flow area at the center of the funnel to perform spiral motion under the action of the guide vane and inertia force, the motion path of the sand-laden water flow in the funnel is shortened, and the silt in the spiral flow area is not easy to deposit on the bottom plate or escape along with overflow under the action of air vortex rotation and can only be discharged from a sand discharge bottom hole. Therefore, the sediment deposition amount of the bottom plate of the hopper chamber on the inner side of the rear upright post with the guide vane is reduced, and the sediment discharge rate of the bottom hole is increased.
Preferably, the guide vane type sand discharge funnel comprises a water inlet culvert, a side wall, an overflow weir and a side groove, wherein the water inlet culvert is connected to the upper part of the funnel chamber and is tangent to the outer circumference of the funnel chamber, a sand discharge bottom hole is formed in the bottom of the funnel chamber, the sand discharge bottom hole is connected with a sand discharge gallery, the side wall is connected to the upper part of the funnel chamber to form a first arc section surrounding structure, the overflow weir is connected to the upper part of the funnel chamber to form a second arc section surrounding structure, the height of the overflow weir is lower than that of the side wall, the side groove is connected to one side of the overflow weir, the side groove and the side wall form a third arc section surrounding structure, and a diversion canal opening is formed in the side groove.
Preferably, the side groove is formed by splicing a bottom plate, an end plate and a side plate, one end of the bottom plate is connected with the side wall of the hopper chamber, the side plate is connected to the other end of the bottom plate, the end plate connects the side wall and the side plate together to form a side wall surrounding structure of the side groove, and the water channel opening is located on the side plate.
Compared with the prior art, the guide vane type sand discharge funnel provided by the invention has the following prominent substantive characteristics and remarkable progress:
this sediment funnel is arranged to guide vane formula sets up the guide vane on the stand, and the guide vane has changed the flow direction that the funnel room bottom high concentration contains husky rivers, because the guide vane water conservancy diversion effect, originally is the sand holding rivers movement path of circular motion along the inboard place circumference of stand and near and is changed, and the spiral flow region that sand holding rivers can get into the funnel center fast carries out the screw motion under the combined action of guide vane and inertial force. Under the action of air vortex, silt in the spiral flow area is not easy to deposit on the bottom plate or escape along with overflow, and only can be discharged from the sand discharge bottom hole. The guide vane type sand discharge funnel reduces the sediment deposition amount of a funnel chamber bottom plate on the inner side of the stand column, improves the bottom hole sand discharge rate, and effectively solves the problems that the sediment deposition of the funnel chamber bottom plate caused by the stand column in the existing sand discharge funnel technology seriously causes the sand cutting rate and the sand discharge rate of the sand discharge funnel engineering along with the increase of the operation time.
Drawings
FIG. 1 is a schematic perspective view of a guide vane type sand discharge funnel according to an embodiment of the present invention;
FIG. 2 is a schematic view showing the internal structure of the guide vane type sand discharge funnel of FIG. 1;
FIG. 3 is a top view of FIG. 1;
fig. 4 is a cross-sectional view at a-a in fig. 3.
Reference numerals: the water inlet culvert comprises a water inlet culvert 1, side walls 2, upright columns 3, guide vanes 4, a sand discharge bottom hole 5, a flow regulating suspension plate 6, an overflow weir 7, a side groove 8, a funnel chamber 9, a water inlet channel opening 10, a first arc section surrounding structure 11, a second arc section surrounding structure 12 and a third arc section surrounding structure 13.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
A guide vane type sand hopper as shown in figures 1-4 for optimizing the sand hopper technology for handling suspended solids sand-laden water streams. This sediment hopper is arranged to guide vane formula sets up the guide vane on the stand, and this guide vane has changed the flow direction that the funnel room bottom high concentration contains husky rivers, because guide vane water conservancy diversion effect, originally along the inboard circumference of stand and near do circular motion hold husky rivers movement path with the arms and be changed, hold husky rivers and can get into the spiral flow region at funnel center fast and carry out the screw motion under the combined action of guide vane and inertial force. Under the action of air vortex, silt in the spiral flow area is not easy to deposit on the bottom plate or escape along with overflow, and only can be discharged from the sand discharge bottom hole. The guide vane type sand discharge funnel reduces the sediment deposition amount of the bottom plate of the funnel chamber on the inner side of the stand column, and improves the sand discharge rate of the bottom hole. In conclusion, the guide vane can effectively solve the problems of the prior art of the sand discharge funnel that the silt discharge rate of a funnel chamber is increased and the silt discharge rate of a sand discharge bottom hole is reduced due to the fact that the upright post supporting system is additionally arranged below the flow adjusting suspension plate.
As shown in fig. 1 and fig. 2, the guide vane type sand discharge funnel comprises a water inlet culvert 1, a side wall 2, a funnel chamber 9, a flow regulating suspension plate 6, an overflow weir 7 and a side groove 8. The inlet culvert 1 is connected to the upper part of the funnel chamber 9 and is tangent to the outer circumference of the funnel chamber 9. The bottom of the funnel chamber 9 is provided with a sand discharge bottom hole 5. The sand discharge bottom hole 5 is connected with a sand discharge gallery. The side wall 2 is connected to the upper part of the hopper chamber 9 to form a first arc segment surrounding structure 11. The overflow weir 7 is connected to the upper part of the funnel chamber 9 to form a second arc segment surrounding structure 12. The height of the overflow weir 7 is lower than the height of the side wall 2. The side groove 8 is connected to the side of the overflow weir 7. The side groove 8 and the side wall 2 form a third arc segment surrounding structure 13. The side groove 8 is provided with a water channel opening 10.
As shown in fig. 4, the flow regulating suspension plate 6 is located in the hopper chamber 9. The upright posts 3 support the flow adjusting suspension plate. The top end of the upright post 3 is connected with a flow regulating suspension plate 6. The bottom end of the upright 3 is connected with a funnel chamber 9. The guide vane 4 is connected to the column 3. One side of the guide vane 4 close to the center of the hopper chamber 9 is in a circular arc surface shape. The side of the guide vane 4 far away from the center of the funnel chamber 9 is planar. The guide vane 4 and the tangent direction of the concentric circle where the outer diameter of the upright post 3 is located form an included angle.
Wherein, stand 3 is used for forming the support to the unsettled part of accent class hang plate 6, guide vane 4 has changed the flow direction that funnel room bottom high concentration contains husky rivers, at stand and guide vane inboard region (being close to the funnel center), this guide vane has changed the flow direction that funnel room bottom high concentration contains husky rivers, because guide vane water conservancy diversion effect, the sand holding rivers motion path that circular motion was done to original along stand inboard place circumference and near and is changed, the spiral flow region that can get into the funnel center fast carries out helical motion under the combined action of guide vane and inertial force holds the husky rivers. Under the action of air vortex, silt in the spiral flow area is not easy to deposit on the bottom plate or escape along with overflow, and only can be discharged from the sand discharge bottom hole. The guide vane type sand discharge funnel reduces the sediment deposition amount of the bottom plate of the funnel chamber on the inner side of the stand column, and improves the sand discharge rate of the bottom hole.
For example, when the flow adjusting suspension plate is horizontally arranged, in order to improve the interception rate of silt when a high-concentration sand-containing water flow is treated, the diameter of the sand discharge funnel can be increased to reduce the flow velocity in the funnel chamber, and the width of the flow adjusting suspension plate is correspondingly increased along with the increase of the diameter of the sand discharge funnel. Therefore, the self weight of the flow regulating suspension plate is increased, and the upright columns need to be arranged below the flow regulating suspension plate to support the flow regulating suspension plate, so that the safety and stability of the flow regulating suspension plate are ensured. However, the addition of the column system causes local interference to the spiral flow field in the hopper chamber, local head loss is increased, the rotational flow velocity is reduced, the rotational speed and the spiral flow strength of air vortex are weakened, silt is deposited on the bottom plate after settling to the bottom plate of the hopper chamber, and the silt is difficult to be discharged through a sediment discharge bottom hole. In order to increase the upright post to ensure the stable horizontal arrangement of the suspension plate and simultaneously reduce the silt in the funnel chamber, the upright post is provided with the guide vane, the guide vane changes the flow direction of the high-concentration sandy water flow at the bottom of the funnel chamber, the sand-laden water flow movement path which originally does circular movement along the circumference of the inner side of the upright post and the vicinity of the circumference is changed due to the flow guiding effect of the guide vane, and the sand-laden water flow can quickly enter the spiral flow area at the center of the funnel to perform spiral movement under the combined action of the guide vane and the inertia force. Under the action of air vortex, silt in the spiral flow area is not easy to deposit on the bottom plate or escape along with overflow, and only can be discharged from the sand discharge bottom hole. The guide vane type sand discharge funnel reduces the sediment deposition amount of a funnel chamber bottom plate on the inner side of the stand column, improves the bottom hole sand discharge rate, and effectively solves the problems that the sediment deposition of the funnel chamber bottom plate caused by the stand column in the existing sand discharge funnel technology seriously causes the sand cutting rate and the sand discharge rate of the sand discharge funnel engineering along with the increase of the operation time.
As shown in fig. 2, the side groove 8 is formed by splicing a bottom plate, an end plate and a side plate. One end of the bottom plate is connected to the side wall of the funnel chamber 9. The side plate is connected with the other end of the bottom plate. The end plates connect the side walls 2 and side plates together to form a side wall enclosure for the side channels 8. The inlet channel mouth 10 is located on the side plate.
As shown in fig. 3, the columns 3 are distributed along the axis of the sand discharge bottom hole 5 in an arc shape. The guide vane 4 is located at the bottom end of the upright post 3. So set up, be many stands 3 of circular-arc distribution, be favorable to carrying out the support to flow adjusting hanger plate 6 more evenly. The guide vane 4 positioned at the bottom end of the upright post 3 changes the flow direction of the high-concentration sand-containing water flow at the bottom of the funnel chamber, and due to the flow guide effect of the guide vane, the sand-laden water flow movement path which originally does circular movement along the circumference of the inner side of the upright post and the vicinity of the circumference is changed, and the sand-laden water flow can quickly enter the spiral flow area at the center of the funnel to perform spiral movement under the combined action of the guide vane and the inertia force. Under the action of air vortex, silt in the spiral flow area is not easy to deposit on the bottom plate or escape along with overflow, and only can be discharged from the sand discharge bottom hole. The guide vane type sand discharge funnel reduces the sediment deposition amount of the bottom plate of the funnel chamber on the inner side of the stand column, and improves the sand discharge rate of the bottom hole.
According to the guide vane type sand discharge funnel provided by the embodiment of the invention, high-concentration sand-containing water flow enters the funnel chamber from the water inlet culvert. The sand-containing water flow carries out rotational flow motion in the funnel chamber, and water-sand separation is realized. Most of the silt in the sand-containing water flow is discharged into a sand discharge gallery through a sand discharge bottom hole at the bottom of the funnel chamber and discharged. The supernatant in the funnel chamber is the water flow with lower sand concentration, flows into the side groove through the overflow weir along the flow adjusting suspension plate, and finally enters the diversion channel through the diversion channel mouth.
In order to further verify the improvement effect of the sand discharge efficiency of the sand discharge funnel after the guide vane is additionally arranged on the stand column, test tests are carried out under various water flow working conditions aiming at two conditions that whether the guide vane is arranged on the stand column, and the change of the sediment quality of a bottom plate of the sand discharge funnel when different inflow sand concentration is detected after the guide vane is additionally arranged on the stand column of the sand discharge funnel. The two sand discharge funnels are tested under different inflow rates and inflow sand-containing concentrations, the sediment deposition quality on a bottom plate of the sand discharge funnel without a guide vane and after the guide vane is arranged, the sediment deposition quality on a flow regulating suspension plate and the sand-containing concentrations and the flow rates of inflow water flow and outflow water flow are measured respectively, and the sediment interception rate, the sand discharge water consumption rate and the bottom hole sand discharge rate are calculated according to the sand-containing concentrations and flow meters corresponding to all working conditions.
The inlet flow rates of the sand discharge funnels are respectively 0.83l/s, 1.66l/s and 2.07l/s, and the sand concentration of the water flow at the inlet is respectively 6kg/m3、9kg/m3And in the test, the water is cut off after the funnel runs for 1.5h under each working condition.
The total silt interception rate is calculated by the following formula:
wherein eta is the total silt cut-off rate QwFor inlet flow, Q0For overflow outlet flow, SwIs the sand concentration, S, of the influent stream0The sand outlet concentration of the overflow port.
The sand discharge water consumption rate is calculated by the following formula:
wherein, lambda is the sand-discharging water-consumption rate, QdFor the flow of the sand-discharging bottom hole, QwIs the inlet flow.
The bottom hole sand discharge rate is calculated by the following formula:
wherein mu is bottom hole sand discharge rate, QdFor the flow of the sand-discharging bottom hole, SdIs the sand concentration at the bottom hole outlet, QwIs the inlet flow, SwThe influent sand concentration.
In order to better compare the change of the sediment quality deposited on the bottom plate of the funnel chamber and the flow regulating suspension plate under the two conditions that whether the guide vanes are arranged on the upright post or not, phi,
The two parameters respectively represent the relative variation of the sediment quality deposited on the bottom plate of the hopper chamber and the relative variation of the sediment quality deposited on the flow regulating suspension plate. The computational expressions for the above two parameters are as follows:
phi is the relative variation of the mass of sediment on the bottom plate of the funnel chamber after the guide vane is installed on the upright column relative to the mass of sediment on the bottom plate of the funnel chamber when the guide vane is not installed on the upright column, M2For the quality after silt is dried, M, deposited on the bottom plate of the funnel chamber with guide vanes installed on the upright column1The quality of the dried sediment deposited on the bottom plate of the funnel chamber without the guide vane on the upright post is shown;
the relative variation quantity m of the sediment mass on the flow regulating suspension plate after the guide vanes are installed on the upright post relative to the sediment mass on the flow regulating suspension plate when the guide vanes are not installed on the upright post2The quality m after silt deposition and drying on the flow-regulating suspension plate for installing guide vanes on the upright posts1The quality of the dried sediment deposited on the flow regulating suspension plate without the guide vane is shown.
The results of the experiment are shown in tables 1 and 2.
TABLE 1 Sand concentration of the water stream at the inlet of 6kg/m3Result comparison of guide plate on time column
TABLE 2 Sand concentration of the water stream at the inlet of 9kg/m3Result comparison of guide plate and guide plate on column
As can be seen from the combination of tables 1 and 2, the sand concentration of the water flow at the inlet is 6kg/m3When the flow rate of the inlet is respectively 0.83l/s, 1.66l/s (design flow rate) and 2.07l/s, the mass of sediment of the funnel chamber after the guide vane is installed on the upright post is respectively reduced by 16.6 percent, 2.61 percent and 16.48 percent relative to the relative variation of the mass of sediment of the funnel chamber when the guide vane is not installed on the upright post, and the mass of sediment of the flow regulating suspension plate after the guide vane is installed on the upright post is respectively reduced by 16.29 percent, 2.07 percent and 12.89 percent relative to the relative variation of the mass of sediment of the flow regulating suspension plate when the guide vane is not installed on the upright post; the sand concentration of the water flow at the inlet is 9kg/m3When the flow rate of the inlet is respectively 0.83L/s, 1.66L/s (design flow rate) and 2.07L/s, the mass of sediment deposited on the cone bottom of the funnel chamber after the guide vane is installed on the upright post is respectively reduced by 27.83%, 15.75% and 37.21% relative to the relative variation of the mass of sediment deposited on the cone bottom of the funnel chamber when the guide vane is not installed on the upright post, and the mass of sediment deposited on the flow regulating suspension plate after the guide vane is installed on the upright post is respectively reduced by 18.92%, 6.1% and 30.77% relative to the relative variation of the mass of sediment deposited on the flow regulating suspension plate when the guide vane is not installed on the upright post. Obviously, after the guide vane is additionally arranged on the upright post, the sediment quality on the bottom plate of the funnel chamber and the flow regulating suspension plate is obviously reduced, and the sediment quality on the surfaces of the funnel chamber and the suspension plate is obviously reduced along with the increase of the inflow sediment concentration. It can also be seen from the table that the interception rate and the sand discharge water consumption rate of the front and rear sand discharge funnels with the guide vane added under the inlet concentration of each level are not large when the flow is less than or equal to the design flow.
When the inflow exceeds the designed flow, the interception rate is reduced, the sand discharge water consumption rate is slightly reduced, and if the sand concentration at the inlet is 9kg/m3When the flow rate is 2.07L/s, the cut-off rate is reduced from 28.1 percent to 23.18 percent, and the reduction is about 5 percent. The sand discharge funnel operates when the inlet flow exceeds the design flow, and the cutting rate is lower than the design flow operation condition due to the large turbulent intensity of the sand discharge funnel; the strength of spiral flow and the turbulent fluctuation strength of water flow are increased after the guide vanes are added, so that the axial flow velocity for settling sediment and the radial flow velocity for transporting sediment are influenced by the turbulent fluctuation effect of water flow, and the interception rate is reduced. In the operation process of the actual engineering, once the working condition of the operation exceeding the designed flow occurs, the water inflow of the river channel is large, the sediment amount of the water flow is large, the sediment settlement amount in unit time after the water flow enters the hopper chamber is large, the volume of the hopper chamber is reduced, the retention time of the sediment moving along with the flow in the hopper chamber is reduced, the overflow amount is increased, and the interception rate is reduced. The results of the examples show that the turbulence intensity is increased after the guide vanes are added, so that a large amount of silt can be effectively prevented from being deposited in the funnel chamber, for example, the sand concentration of the water flow at the inlet is 9kg/m3When the flow rate is 2.07L/s and exceeds the design flow rate, the relative variation of the sediment mass on the bottom plate of the funnel chamber after the guide vane is installed on the upright column is reduced by 37.21% relative to the relative variation of the sediment mass on the bottom plate of the funnel chamber when the guide vane is not installed on the upright column, and the interception rate is only reduced by about 5%.
The present invention is not limited to the specific technical solutions described in the above embodiments, and other embodiments may be made in the present invention in addition to the above embodiments. It will be understood by those skilled in the art that various changes, substitutions of equivalents, and alterations can be made without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a sediment funnel is arranged to guide vane formula, its characterized in that, includes the funnel room, transfers and flows hanging deck, stand and guide vane, transfer and flow the hanging deck and be located the funnel room, the stand forms the support to transferring and flowing the hanging deck, the top of stand links to each other with transferring and flowing the hanging deck, the bottom of stand links to each other with the funnel room, the guide vane links to each other with the stand.
2. The guide vane type sand discharge funnel according to claim 1, wherein: one side of the guide vane close to the center of the funnel chamber is in a plane or arc surface shape, and one side of the guide vane far away from the center of the funnel chamber is in a plane or arc surface shape.
3. The guide vane type sand discharge funnel according to claim 1, wherein the guide vane has an angle with a tangential direction of a concentric circle where an outer diameter of the pillar is located.
4. The guide vane type sand discharge funnel according to claim 1, wherein the columns are distributed along the axis of the sand discharge bottom hole in a circular arc shape, and the guide vane is connected with the columns.
5. The guide-vane type sand discharge funnel according to claim 1, wherein the guide-vane type sand discharge funnel comprises a water inlet culvert, a side wall, an overflow weir and a side groove, the water inlet culvert is connected to the upper part of the funnel chamber and is tangent to the outer circumference of the funnel chamber, a sand discharge bottom hole is formed in the bottom of the funnel chamber, the sand discharge bottom hole is connected with a sand discharge gallery, the side wall is connected to the upper part of the funnel chamber to form a first arc section surrounding structure, the overflow weir is connected to the upper part of the funnel chamber to form a second arc section surrounding structure, the height of the overflow weir is lower than that of the side wall, the side groove is connected to one side of the overflow weir, the side groove and the side wall form a third arc section surrounding structure, and a water channel opening is formed in the side groove.
6. The guide vane type sand discharge funnel as claimed in claim 5, wherein the side groove is formed by splicing a bottom plate, an end plate and a side plate, one end of the bottom plate is connected with the side wall of the funnel chamber, the side plate is connected with the other end of the bottom plate, the end plate connects the side wall and the side plate together to form a side wall surrounding structure of the side groove, and the diversion canal opening is positioned on the side plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210007651.8A CN114370035A (en) | 2022-01-06 | 2022-01-06 | Guide sheet type sand discharge funnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210007651.8A CN114370035A (en) | 2022-01-06 | 2022-01-06 | Guide sheet type sand discharge funnel |
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| CN114370035A true CN114370035A (en) | 2022-04-19 |
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| CN202210007651.8A Pending CN114370035A (en) | 2022-01-06 | 2022-01-06 | Guide sheet type sand discharge funnel |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2673955Y (en) * | 2004-01-17 | 2005-01-26 | 新疆水利水电科学研究院 | Collar vortex sand removing equipment |
| US20190352923A1 (en) * | 2016-02-17 | 2019-11-21 | Purple Line Limited | Camping assembly with a storage box and a tent |
| CN111270657A (en) * | 2020-02-04 | 2020-06-12 | 新疆农业大学 | Sand discharge funnel |
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2022
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2673955Y (en) * | 2004-01-17 | 2005-01-26 | 新疆水利水电科学研究院 | Collar vortex sand removing equipment |
| US20190352923A1 (en) * | 2016-02-17 | 2019-11-21 | Purple Line Limited | Camping assembly with a storage box and a tent |
| CN111270657A (en) * | 2020-02-04 | 2020-06-12 | 新疆农业大学 | Sand discharge funnel |
Non-Patent Citations (1)
| Title |
|---|
| 王元等: "立柱排布方式对悬沙排沙漏斗水沙分离性能的影响", 《水资源与水工程学报》, vol. 32, no. 6, pages 152 - 158 * |
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