CN215714968U - Inlet section structure of inverted siphon pipeline - Google Patents
Inlet section structure of inverted siphon pipeline Download PDFInfo
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- CN215714968U CN215714968U CN202121076687.9U CN202121076687U CN215714968U CN 215714968 U CN215714968 U CN 215714968U CN 202121076687 U CN202121076687 U CN 202121076687U CN 215714968 U CN215714968 U CN 215714968U
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Abstract
The utility model provides an inlet section structure of an inverted siphon pipeline, which comprises a gradual change section, a slope section, a desilting pool, a water inlet gate, a stilling well type water inlet pool slope section and a stilling well type water inlet pool which are sequentially communicated along the flowing direction of water flow. The utility model arranges the stilling well type water inlet pool at the downstream of the water inlet gate, reduces the elevation of the bottom plate of the stilling well type water inlet pool, ensures the submergence depth of the top of the inlet pipe, meets the submergence flow state, arranges the water outlet gate at the upstream side of the water inlet gate, is used for inverted siphon water outlet under the condition of emergency accidents, and can discharge excessive water to ensure the safety of the water inlet when the upstream incoming water is more than the overflowing capacity of the inverted siphon in the actual operation process, thereby ensuring the submergence depth of the water inlet to avoid the influence of water jump and vortex on the safety of the pipeline, ensuring the smooth operation of the inverted siphon and reducing the safety risk.
Description
Technical Field
The utility model belongs to the technical field of hydraulic engineering, and particularly relates to an inlet section structure of an inverted siphon pipeline.
Background
The inverted siphon is a common hydraulic structure and is widely applied to water diversion, water supply and other projects. When the sand carrying amount of the water flow is large, the sediment brought into the inverted siphon pipeline by the water flow often causes siltation and abrasion to the pipeline, the flow capacity of the inverted siphon is greatly reduced over time, and the normal use and the service life of the inverted siphon are influenced; in addition, if the upstream water inflow is larger than the overflowing capacity of the inverted siphon pipeline, the water inlet of the inverted siphon pipeline, surrounding buildings, farmlands and the like can be submerged, economic property and other losses are caused, and certain threats are formed on the safety of buildings.
The water flow in the inverted siphon pipeline is pressure pipe flow, and a water inlet of the inverted siphon pipeline needs to meet a certain submerging depth so as to avoid the influence of hydraulic jump and vortex on the safety of the pipeline, so that the selection of a proper water inlet structural form is very important for the normal operation of the pipeline.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an inlet section structure of an inverted siphon pipeline, so as to overcome the technical defects.
In order to solve the technical problem, the utility model provides an inlet section structure of an inverted siphon pipeline, which comprises a gradual change section, a slope section, a sand settling tank, a water inlet gate, a slope section of a stilling well type water inlet tank and the stilling well type water inlet tank which are sequentially communicated along the flowing direction of water flow, wherein a water retaining wall is erected at the tail part of the stilling well type water inlet tank, the inverted siphon pipeline is laid in the water retaining wall in a penetrating way, and an upstream pipe orifice of the inverted siphon pipeline is used as a water inlet;
and a water stopping material is embedded at the joint between any two adjacent water stopping materials.
Furthermore, a water outlet channel communicated with the wall of the desilting basin is formed in the wall of the desilting basin, a water outlet gate is installed in the water outlet channel, and a water outlet channel gradual change section is arranged at the downstream of the water outlet gate along the flowing direction of water flow.
Preferably, the upstream of the transition section is an upstream channel, the upstream channel and the transition section are adjacent and communicated, the length of the transition section is 3-5 times of the water depth of the upstream channel, and the transition section adopts any one of a twisted surface, a splayed inclined wall and a circular arc straight wall.
Further, the sand basin is a cast-in-place reinforced concrete structure, the depth H =0.5r +0.2m, the width W =1.5a, and the length L = × H, wherein:
r represents the outer diameter of the inverted siphon pipe;
a represents the bottom width of the upstream channel;
h represents the water depth of the upstream channel.
Preferably, the floor elevation of the intake gate is coincident with the floor elevation of the upstream channel.
Furthermore, the included angle between the center line of the sand settling tank in the water flow direction and the center line of the water outlet channel in the water flow direction is 30 degrees, the elevation of the bottom plate of the sand settling tank is consistent with that of the bottom plate of the water outlet gate, and the elevation of the top of the water outlet gate is 1-10 cm higher than the designed water level.
Preferably, the water inlet is in a horn shape, the large-diameter end of the water inlet is positioned at the upstream, the material of the water inlet is the same as that of the inverted siphon pipeline, a waterproof wing ring which is welded on the inverted siphon pipeline in a penetrating and sleeving manner is arranged at the water inlet, and the waterproof wing ring is embedded into the water retaining wall.
The utility model has the following beneficial effects:
the utility model arranges the stilling well type water inlet pool at the downstream of the water inlet gate, reduces the elevation of the bottom plate of the stilling well type water inlet pool, ensures the submergence depth of the top of the inlet pipe, meets the submergence flow state, arranges the water outlet gate at the upstream side of the water inlet gate, is used for inverted siphon water outlet under the condition of emergency accidents, and can discharge excessive water to ensure the safety of the water inlet when the upstream incoming water is more than the overflowing capacity of the inverted siphon in the actual operation process, thereby ensuring the submergence depth of the water inlet to avoid the influence of water jump and vortex on the safety of the pipeline, ensuring the smooth operation of the inverted siphon and reducing the safety risk.
In order to make the aforementioned and other objects of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a plan view of an inlet section structure of an inverted siphon channel.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a partial sectional view taken along line B-B of fig. 1.
Description of reference numerals:
1. an upstream channel; 2. a transition section; 3. a slope section; 4. a desilting pool; 5. a water inlet gate; 6. a slope section of the absorption well type water inlet pool; 7. a stilling well type water inlet pool; 8. a waterproof wing ring; 9. a water inlet; 10. a water stopping material; 11. a water return gate; 12. a gradual change section of the water-withdrawal channel; 13. a water withdrawal channel; 14. a water retaining wall; 15. a bottom plate of the water inlet tank; 16. and (4) a reverse siphon pipeline.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
In the present invention, the upper, lower, left and right in the drawings are regarded as the upper, lower, left and right of the inlet section structure of the inverted siphon pipe described in the present specification.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the utility model. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
First embodiment
The present embodiment relates to an inlet section structure of an inverted siphon pipeline, as shown in fig. 1 or fig. 2, the inlet section structure includes a gradual change section 2, a slope section 3, a sand settling tank 4, a water inlet gate 5, a slope section 6 of a stilling well type water inlet tank and a stilling well type water inlet tank 7 which are sequentially communicated along a flow direction of water flow (arrows represent a water flow direction in the figure), a water retaining wall 14 is erected at a tail part of the stilling well type water inlet tank 7, an inverted siphon pipeline 16 is laid through the water retaining wall 14, and an upstream pipe orifice of the inverted siphon pipeline 16 serves as a water inlet 9.
The inlet section structure of the inverted siphon pipeline is positioned at the upstream of the inverted siphon pipeline 16, and the working principle is as follows:
the water flow in the upstream channel 1 flows to the gradual change section 2, the impact force of the water flow is dispersed and then flows to the desilting basin 4 along the slope section 3, most of silt carried by the water flow is intercepted, the water inlet gate 5 is kept in an open state, the water flow entering the inverted siphon pipeline 16 is controlled, the water flow continues to flow, flows through the slope section 6 of the inverted siphon inlet basin and enters the inverted siphon pipeline 16, the water flow is dissipated, and finally enters the inverted siphon pipeline 16 through the water inlet 9.
The gradual change section 2 is used for enabling water flow to smoothly flow into the desilting basin 4 from a channel, so that the water flow is prevented from generating eddy current, and the water head loss and cavitation damage are reduced.
The flow rate of the sediment tank 4 is reduced by enlarging the water passing section, and sediment which does not meet the requirement of water use is precipitated.
If an accident occurs inside the inverted siphon pipe 16, the inlet gate 5 is closed to block the water flow entering the inverted siphon pipe 16.
In order to avoid water seepage, referring to fig. 2, a water-stopping material 10 is buried in the connection between any two adjacent water-stopping materials.
Second embodiment
The present embodiment relates to an inlet section structure of an inverted siphon pipeline, as shown in fig. 1 or fig. 2, the inlet section structure includes a gradual change section 2, a slope section 3, a sand settling tank 4, a water inlet gate 5, a slope section 6 of a stilling well type water inlet tank and a stilling well type water inlet tank 7 which are sequentially communicated along a flow direction of water flow (arrows represent a water flow direction in the figure), a water retaining wall 14 is erected at a tail part of the stilling well type water inlet tank 7, an inverted siphon pipeline 16 is laid through the water retaining wall 14, and an upstream pipe orifice of the inverted siphon pipeline 16 serves as a water inlet 9.
The wall of the sand basin 4 is provided with a water outlet channel communicated with the wall, referring to fig. 1, the water outlet channel is positioned at one side of the sand basin 4, a water outlet gate 11 is arranged in the water outlet channel, the elevation of the bottom plate of the water outlet gate 11 is consistent with that of the bottom plate of the sand basin 4, and the water outlet channel is mainly used for draining the upstream channel 1 when the upstream excess water inflow and the pipeline are in emergency, and simultaneously takes account of the sand flushing effect of the sand basin.
As shown in fig. 3, the top height of the water outlet gate 11 is 1-10 cm higher than the designed water level, and can be used as an overflow weir, if an emergency occurs in the inverted siphon pipeline 16, the drainage capacity is suddenly reduced, and when the water outlet gate 11 is not opened in time, the water flow can flow out over the gate, so as not to submerge the water inlet building, the surrounding buildings, the farmland and the like.
Downstream of the drain gate 11, in the flow direction of the water flow, is a drain channel transition 12 to ensure smooth drain of the water flow.
The included angle between the central line of the desilting basin 4 along the water flow direction and the central line of the water discharge channel along the water flow direction is preferably 30 degrees, which is a preferred included angle, but the included angle is not limited to this, and other angles can also be used.
The upstream of the gradual change section 2 is an upstream channel 1, which is located between the upstream channel 1 and a desilting basin 4 and is used for connecting the upstream channel 1 and the desilting basin 4 in sequence, so that water flows smoothly from the upstream channel 1 into the desilting basin 4, the upstream channel 1 is adjacent to and communicated with the gradual change section 2, the length of the gradual change section 2 is 3-5 times of the water depth of the upstream channel 1, and the gradual change section 2 is in any form of a twisted surface, a splayed inclined wall, a circular arc straight wall or other forms.
The sand basin 4 is a cast-in-place reinforced concrete structure, the depth H =0.5r +0.2m, the width W =1.5a, the length L = 4-5 × H, wherein:
r represents the outer diameter of the inverted siphon pipe;
a represents the bottom width of the upstream channel;
h represents the water depth of the upstream channel.
The sand settling tank 4 plays a role in settling sand and intercepts most of silt carried by water flow.
The water inlet gate 5 is located behind the sand basin 4, and the elevation of the bottom plate of the water inlet gate 5 is consistent with that of the bottom plate of the upstream channel 1, so that the water flow entering the inverted siphon pipeline 16 can be controlled, and if an accident occurs inside the inverted siphon pipeline 16, the water flow entering the inverted siphon pipeline 16 can be blocked by closing the water inlet gate 5.
The stilling well type water inlet pool 7 is positioned behind the water inlet gate 5, the elevation of the bottom plate of the stilling well type water inlet pool 7 is reduced, namely the elevation of the bottom plate of the water inlet pool bottom plate 15 is lower than the water inlet 9, so that the pipe top has enough submerging depth, the stilling well type water inlet pool 7 is of a cast-in-place concrete structure, the stilling well type water inlet pool is connected with the water inlet gate 5 through a stilling well type water inlet pool slope section 6, the slope (1: 3) - (1: 5) is between, the pool length meets the requirement of the water jump length in the pool, and the pool width meets the requirement that the single width flow of the water flow in the pool is less than 10-15 m3And/s, the distance between the bottom of the tank and the bottom of the pipe is about 50cm, the distance between the top of the pipe and the designed water level is 1.5-2.5 times of the pipe diameter, and the distance between the top of the tank and the designed water level is kept to be 0.3-0.5 m, namely the safety height.
The water inlet 9 is in a horn shape, the large-diameter end of the water inlet 9 is located at the upstream, the material of the water inlet 9 is the same as that of the inverted siphon pipeline 16, and the water flow smoothly flows into the inverted siphon pipeline 16, so that the head loss is reduced, and the arrangement of the inverted siphon pipeline 16 and the selection of the pipe diameter are facilitated.
The water inlet 9 is provided with a waterproof wing ring 8 which is sleeved and welded on the inverted siphon pipeline 16, the waterproof wing ring 8 is embedded and inserted into the water retaining wall 14, specifically, the waterproof wing ring 8 is arranged between the water retaining wall 14 and the inverted siphon pipeline 16 and adopts a welding connection form with the inverted siphon pipeline 16, and then the waterproof wing ring 8 is inserted into the water retaining wall 14 to prevent water flow from seepage along the pipe wall.
This embodiment arranges the desilting pond before the inlet lock, deposit and cut off most silt content in the aquatic, avoid silt to get into the inverted siphon, the siltation pipeline, arrange the well formula inlet basin that disappears behind the inlet lock, reduce inlet lock bottom plate elevation, guarantee the inlet tube top submergence degree of depth, satisfy and submerge the flow state, the upper reaches side of inlet lock arranges the water gate that moves back for the siphon moves back under the emergency accident condition, simultaneously at the actual motion in-process, when the upper reaches water that comes is greater than the siphon ability of overflowing, can release unnecessary water, guarantee water inlet safety.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the utility model, and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model in practice.
Claims (7)
1. An inlet section structure of an inverted siphon pipeline is characterized by comprising a gradual change section (2), a slope section (3), a sand settling tank (4), a water inlet gate (5), a stilling well type water inlet tank slope section (6) and a stilling well type water inlet tank (7) which are sequentially communicated along the flowing direction of water flow, wherein a water retaining wall (14) is erected at the tail part of the stilling well type water inlet tank (7), an inverted siphon pipeline (16) penetrates through and is laid in the water retaining wall (14), and an upstream pipe orifice of the inverted siphon pipeline (16) serves as a water inlet (9);
a water stop material (10) is embedded at the joint between any two adjacent water stop materials.
2. The inducer structure of the inverted siphon according to claim 1, characterized in that the wall of the desilting basin (4) is provided with a water outlet channel communicated with the wall, a water outlet gate (11) is installed in the water outlet channel, and a water outlet channel transition section (12) is arranged at the downstream of the water outlet gate (11) along the flowing direction of the water flow.
3. The inducer structure of the inverted siphon pipe according to claim 1, characterized in that the upstream of the gradual change section (2) is an upstream channel (1), the two are adjacent and communicated, the length of the gradual change section (2) is 3-5 times of the water depth of the upstream channel (1), and the gradual change section (2) is in any form of a twisted surface, a splayed inclined wall and a circular arc straight wall.
4. The inlet section structure of an inverted siphon pipeline according to claim 3, wherein the desilting basin (4) is a cast-in-place reinforced concrete structure, its depth H =0.5r +0.2m, its width W =1.5a, its length L = (4-5). times.h, wherein:
r represents the outer diameter of the inverted siphon pipe;
a represents the bottom width of the upstream channel;
h represents the water depth of the upstream channel.
5. An inlet section structure of inverted siphon channel according to claim 3, characterized in that the floor level of the inlet gate (5) coincides with the floor level of the upstream channel (1).
6. The inlet section structure of an inverted siphon pipeline according to claim 2, characterized in that the included angle between the center line of the desilting basin (4) along the water flow direction and the center line of the water outlet channel along the water flow direction is 30 °, the elevation of the bottom plate of the desilting basin (4) is consistent with that of the bottom plate of the water outlet gate (11), and the elevation of the top of the water outlet gate (11) is 1-10 cm higher than the designed water level.
7. The inlet section structure of an inverted siphon pipe according to claim 1, characterized in that the water inlet (9) is in a trumpet shape, the large diameter end of the water inlet is located at the upstream, the material of the water inlet (9) is the same as that of the inverted siphon pipe (16), a waterproof wing ring (8) which is welded to the inverted siphon pipe (16) in a penetrating and sleeving manner is arranged at the water inlet (9), and the waterproof wing ring (8) is embedded into the water retaining wall (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121076687.9U CN215714968U (en) | 2021-05-19 | 2021-05-19 | Inlet section structure of inverted siphon pipeline |
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| CN202121076687.9U CN215714968U (en) | 2021-05-19 | 2021-05-19 | Inlet section structure of inverted siphon pipeline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114606906A (en) * | 2022-03-29 | 2022-06-10 | 中国水利水电科学研究院 | Device for controlling water flow state in front pool of inverted siphon water inlet |
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2021
- 2021-05-19 CN CN202121076687.9U patent/CN215714968U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114606906A (en) * | 2022-03-29 | 2022-06-10 | 中国水利水电科学研究院 | Device for controlling water flow state in front pool of inverted siphon water inlet |
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