CN212742447U - Vortex chamber structure capable of effectively reducing height of vortex chamber of pressure vertical shaft cyclone tunnel - Google Patents
Vortex chamber structure capable of effectively reducing height of vortex chamber of pressure vertical shaft cyclone tunnel Download PDFInfo
- Publication number
- CN212742447U CN212742447U CN202020860456.6U CN202020860456U CN212742447U CN 212742447 U CN212742447 U CN 212742447U CN 202020860456 U CN202020860456 U CN 202020860456U CN 212742447 U CN212742447 U CN 212742447U
- Authority
- CN
- China
- Prior art keywords
- chamber
- volute
- height
- volute chamber
- pressure
- 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.)
- Active
Links
Images
Classifications
-
- 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
Abstract
The utility model belongs to the technical field of the rivers energy dissipation, concretely relates to effectively reduce and press volute chamber structure of shaft whirl hole volute chamber height. The utility model discloses a have pressure hole, volute chamber, breather pipe, gradual change section and shaft to set up organically and form. The volute chamber is a cylinder with an inlet on the side wall and is vertically arranged, the inlet of the volute chamber is communicated with the pressure hole, and the upward direction of the pressure hole and the upward direction of the central axis of the volute chamber are obliquely arranged in an acute angle; the top of the volute chamber is a flat top, the center of the top of the volute chamber is connected with a vent pipe, and the bottom of the volute chamber is communicated with the vertical shaft through a gradual change section. The pressure hole is in a diffusion shape with gradually increasing height from upstream to downstream, and the flow velocity component of water flow entering the vortex chamber and then upwards is reduced. The top of the vortex chamber adopts a flat-top design, prevents the side wall of the vortex chamber from rotating water flow to continuously rise, and homogenizes the pressure distribution in the vortex chamber. The height of the vortex chamber of the utility model is about 60 percent of the height of the top arch vortex chamber. The utility model discloses the size is simple, easily is under construction, and has reduced the engineering volume of construction.
Description
Technical Field
The utility model belongs to the technical field of the rivers energy dissipation, concretely relates to effectively reduce and press volute chamber structure of shaft whirl hole volute chamber height.
Background
In recent years, in order to reduce the construction cost, a diversion tunnel is reconstructed into a permanent flood discharge tunnel by a plurality of projects, wherein a rotational flow type internal energy dissipater is adopted, so that the lining project can be simplified, the construction cost is reduced, the construction progress is accelerated, and the scouring and atomizing phenomena of the tunnel outlet are reduced. The vortex tunnel can be divided into vertical shaft vortex energy dissipation and horizontal vortex energy dissipation according to the position of the rotating water flow, the vertical shaft vortex tunnel is divided into a non-pressure or pressure vertical shaft vortex tunnel according to the flow state of the water flow at the upper flat section before entering the vortex chamber, the centrifugal force of the rotating water flow is utilized to form a cavity according to the principle, the pressure of the tunnel wall and the hydraulic friction resistance are increased, the flow is prolonged, and the purposes of cavitation erosion prevention and energy dissipation are achieved.
Compared with the non-pressure vertical shaft rotary flow tunnel, the pressure vertical shaft rotary flow tunnel has the following difficulties:
(1) because the pressure vertical shaft swirl hole is usually lower in inlet position and higher in water head above an inlet bottom plate, the flow velocity entering the volute chamber is higher, so that the surge of the volute chamber is higher, and the height of the volute chamber is increased;
(2) the length of the vertical shaft energy dissipation section is smaller, so that the length of the vertical shaft rotational flow energy dissipation section is shortened, and the energy dissipation rate of the vertical shaft is reduced; on the other hand, the impact pressure at the bottom of the shaft is increased. The top of the volute chamber of the pressure shaft vortex tunnel is arched, and the required height of the volute chamber is larger.
SUMMERY OF THE UTILITY MODEL
The utility model provides an effectively reduce and press shaft whirl hole volute chamber height's volute chamber structure, aim at provides one kind can effectively reduce and press shaft whirl hole volute chamber height, simple, the easily construction of size, and reduce the volute chamber structure of construction work volume simultaneously.
In order to achieve the above object, the utility model adopts the following technical scheme:
a volute chamber structure capable of effectively reducing the height of a vortex chamber of a pressure vertical shaft vortex tunnel comprises a pressure tunnel, a vortex chamber, a vent pipe, a gradual change section and a vertical shaft; the vortex chamber is vertically arranged in a cylindrical shape, an inlet is formed in the side wall of the vortex chamber, the inlet of the vortex chamber is communicated with a pressure hole, and the upward direction of the pressure hole and the upward direction of the central axis of the vortex chamber are obliquely arranged in an acute angle; the top of the volute chamber is a flat top, the center of the top of the volute chamber is connected with a vent pipe, and the bottom of the volute chamber is communicated with the vertical shaft through a gradual change section.
The pressure holes are equal in width and gradually increased in height from upstream to downstream, and the width of each pressure hole is 0.3-0.4 times of the diameter of the vortex chamber;
the slope ratio of the bottom slope of the pressure hole is 1: 5-1: 6.
The diffusion angle between the top plate and the bottom plate with the pressure holes is not more than 4.5 degrees.
The height of the joint of the pressure hole and the vortex chamber is not more than 0.4 time of the total height of the vortex chamber.
The ventilation volume of the ventilation pipe is 18-22% of the flow, and the wind speed of the ventilation pipe is not more than 60 m/s.
The transition section is located under the volute chamber, a vertical shaft is arranged under the transition section, and the volute chamber and the vertical shaft are smoothly connected through the transition section.
The diameter of the volute chamber is 1.2-1.4 times of the diameter of the vertical shaft.
The pressure hole, the volute chamber, the vent pipe, the transition section and the vertical shaft are all of reinforced concrete structures.
Has the advantages that:
(1) the utility model provides a have the hole for the diffusion shape from upper reaches to low reaches highly grow gradually, can reduce rivers and get into upward velocity of flow weight behind the volute chamber.
(2) The utility model provides a volute top adopts the flat-topped, can prevent the rotatory rivers of volute side wall to continue to gush the height to the pressure distribution in the homogenization volute.
(3) The utility model discloses a volute chamber height is about 60% of top arch volute chamber height, effectively reduces to press shaft whirl hole volute chamber height.
(4) The utility model discloses the size is simple, easily is under construction, and has reduced the engineering volume of construction.
The above description is only an overview of the technical solution of the present invention, and in order to clearly understand the technical means of the present invention and to implement the technical solution according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a side view of the scroll chamber structure of the present invention;
FIG. 2 is a top view of the vortex chamber structure of the present invention;
fig. 3 is an upstream elevation view of the volute chamber structure of the present invention.
In the figure: 1-punching; 2-vortex chamber; 3-a breather pipe; 4-transition section; 5-a vertical shaft; 6-a top plate; 7-bottom plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1 to 3, a volute chamber structure for effectively reducing the height of a volute chamber of a pressure vertical shaft cyclone tunnel comprises a pressure tunnel 1, a volute chamber 2, a vent pipe 3, a gradual change section 4 and a vertical shaft 5; the vortex chamber 2 is vertically arranged in a cylindrical shape, an inlet is formed in the side wall of the vortex chamber 2, the inlet of the vortex chamber 2 is communicated with the pressure hole 1, and the upward direction of the pressure hole 1 and the upward direction of the central axis of the vortex chamber 2 are obliquely arranged in an acute angle; the top of the volute chamber 2 is flat, the center of the top of the volute chamber 2 is connected with a vent pipe 3, and the bottom of the volute chamber 2 is communicated with a vertical shaft 5 through a transition section 4.
When the device is in actual use, water flow obliquely enters the vortex chamber 2 from the pressure hole 1 downwards, and under the blocking action of the side wall of the vortex chamber 2, a main flow obliquely flows downwards along the side wall of the vortex chamber 2, and a small part of the main flow obliquely flows upwards, and because the top of the vortex chamber 2 is horizontal, the water flow is prevented from continuously flowing upwards and turning to the horizontal or obliquely downward direction, on one hand, the surge height of the vortex chamber 2 is reduced, and on the other hand, the pressure distribution of the vortex chamber 2 is homogenized; the gradual change section 4 smoothly connects the volute chamber 2 and the vertical shaft 5, and large negative pressure is prevented from occurring near the connection part of the vertical shaft 5.
The utility model discloses the size is simple, easily is under construction, and the volute chamber height is about 60% of top arch volute chamber height, has effectively reduced the degree of difficulty and the engineering volume of construction.
Example two:
referring to fig. 1 to 3, a volute chamber structure for effectively reducing the height of a volute chamber of a pressure shaft cyclone cave is different from that of the first embodiment in that: the pressure holes 1 are equal in width and gradually increased in height from upstream to downstream, and the width of the pressure holes 1 is 0.3-0.4 times of the diameter of the vortex chamber 2;
when in actual use, the pressure hole 1 adopts the technical scheme, so that the water flow resistance caused by the width contraction of the pressure hole 1 can be reduced, and the water flow smoothly enters the vortex chamber and flows around the side wall of the vortex chamber.
Example three:
referring to fig. 1 to 3, a volute chamber structure for effectively reducing the height of a volute chamber of a pressure shaft cyclone cave is different from that of the first embodiment in that: the bottom slope ratio of the pressure hole 1 is 1: 5-1: 6.
When in actual use, the pressure hole 1 adopts the technical scheme, so that the upward flow velocity component of water can be reduced, and higher surge generated after the water enters the vortex chamber is avoided.
Example four:
referring to fig. 1 to 3, a volute chamber structure for effectively reducing the height of a volute chamber of a pressure shaft cyclone cave is different from that of the first embodiment in that: the diffusion angle between the top plate 6 and the bottom plate 7 of the pressure hole 1 is not more than 4.5 degrees.
When in actual use, the pressure hole 1 adopts the technical scheme, so that on one hand, water flow can be pulled vertically; on the other hand, the occurrence of a large negative pressure on the top plate 6 due to a large divergence angle can be avoided.
Example five:
referring to fig. 1 to 3, a volute chamber structure for effectively reducing the height of a volute chamber of a pressure shaft cyclone cave is different from that of the first embodiment in that: the height of the joint of the pressure hole 1 and the vortex chamber 2 is not more than 0.4 times of the total height of the vortex chamber 2.
When in actual use, the height of the joint of the pressure hole 1 and the vortex chamber 2 can be reduced by adopting the technical scheme, so that water flow can be smoothly connected, and the height of the vortex chamber can be reduced.
Example six:
referring to fig. 1 to 3, a volute chamber structure for effectively reducing the height of a volute chamber of a pressure shaft cyclone cave is different from that of the first embodiment in that: the ventilation volume of the ventilation pipe 3 is 18-22% of the flow, and the wind speed of the ventilation pipe is not more than 60 m/s.
In practical use, the vent pipe 3 is located at the center of the top of the vortex chamber 2, and the ventilation quantity is related to the Freund number and the flow quantity of the outlet of the pressure hole 1, and can be estimated by adopting the following formula
Qa＝0.1Qm(Fr-1)0.2
In the formula:
Frthe Freund number of the inlet of the vortex chamber 2;
Qais the maximum ventilation of the vortex chamber 2 and has the unit of m3/s；
QmThe maximum drainage capacity of the vertical shaft rotational flow tunnel is as follows: m is3/s；
The ventilation amount is generally about 20% of the flow rate, and the wind speed of the ventilation pipe 3 is preferably not more than 60 m/s.
The breather pipe 3 adopts the technical scheme, can keep the stability of the flow state of the water flow of the volute chamber and each section below the volute chamber, and avoid the larger pulsating pressure of the side wall of the building and the larger vibration of the whole building.
Example seven:
referring to fig. 1 to 3, a volute chamber structure for effectively reducing the height of a volute chamber of a pressure shaft cyclone cave is different from that of the first embodiment in that: the transition section 4 is positioned right below the volute chamber 2, the vertical shaft 5 is arranged right below the transition section 4, and the transition section 4 smoothly connects the volute chamber 2 and the vertical shaft 5.
When in actual use, by adopting the technical scheme, larger negative pressure near the connection part of the vertical shaft 5 can be effectively avoided.
Example eight:
referring to fig. 1 to 3, a volute chamber structure for effectively reducing the height of a volute chamber of a pressure shaft cyclone cave is different from that of the first embodiment in that: the diameter of the volute chamber 2 is 1.2-1.4 times of the diameter of the vertical shaft 5.
In practical use, the shaft 5 is located right below the transition section 4, and the diameter of the shaft can be calculated by adopting the following formula
In the formula:
μ＝1～1.25；
Qmis the maximum discharge capacity of the vertical shaft rotational flow tunnel, m3/s；
g is the acceleration of gravity.
In practical use, the volute chamber 2 adopts the technical scheme, so that the volute chamber and the vertical shaft can be ensured to be capable of meeting the flow discharge capacity of design requirements.
Example nine:
referring to fig. 1 to 3, a volute chamber structure for effectively reducing the height of a volute chamber of a pressure shaft cyclone cave is different from that of the first embodiment in that: the pressure hole 1, the volute chamber 2, the vent pipe 3, the gradual change section 4 and the vertical shaft 5 are all of reinforced concrete structures.
When in actual use, the pressure hole 1, the volute chamber 2, the vent pipe 3, the gradual change section 4 and the vertical shaft 5 adopt the technical scheme, so that the accuracy of building manufacture can be ensured, the damage of water flow to the pressure hole 1, the volute chamber 2, the vent pipe 3, the gradual change section 4 and the vertical shaft 5 can be avoided, and the permanent operation can be ensured.
To sum up, the utility model belongs to the technical field of the rivers energy dissipation, concretely relates to effectively reduce and press vortex room structure of shaft whirl hole vortex room height. The utility model discloses a have pressure hole, volute chamber, breather pipe, gradual change section and shaft to set up organically and form. The volute chamber is a cylinder with an inlet on the side wall and is vertically arranged, the inlet of the volute chamber is communicated with the pressure hole, and the upward direction of the pressure hole and the upward direction of the central axis of the volute chamber are obliquely arranged in an acute angle; the top of the volute chamber is a flat top, the center of the top of the volute chamber is connected with a vent pipe, and the bottom of the volute chamber is communicated with the vertical shaft through a gradual change section. The utility model provides a have the hole for from last diffusion shape that highly gradually becomes big extremely down, can reduce rivers and get into upward velocity of flow weight behind the volute chamber. The utility model provides a volute top adopts the flat-topped, can prevent the rotatory rivers of volute side wall to continue to gush the height to the pressure distribution in the homogenization volute. The utility model discloses a volute chamber height is about 60% of top arch volute chamber height, effectively reduces to press shaft whirl hole volute chamber height. The utility model discloses the size is simple, easily is under construction, and has reduced the engineering volume of construction.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
In the case of no conflict, a person skilled in the art may combine the related technical features in the above examples according to actual situations to achieve corresponding technical effects, and details of various combining situations are not described herein.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
The foregoing is illustrative of the preferred embodiments of the present invention, and the present invention is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention all fall within the scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides an effectively reduce and press vortex chamber structure of shaft whirl hole volute chamber height, its characterized in that: comprises a pressure hole (1), a volute chamber (2), a vent pipe (3), a gradual change section (4) and a vertical shaft (5); the vortex chamber (2) is vertically arranged in a cylindrical shape, an inlet is formed in the side wall of the vortex chamber (2), the inlet of the vortex chamber (2) is communicated with the pressure hole (1), and the upward direction of the pressure hole (1) and the upward direction of the central axis of the vortex chamber (2) are obliquely arranged in an acute angle; the top of the volute chamber (2) is flat, the center of the top of the volute chamber (2) is connected with a vent pipe (3), and the bottom of the volute chamber (2) is communicated with a vertical shaft (5) through a transition section (4).
2. The volute structure for effectively reducing the height of the volute chamber of the pressure shaft swirl tunnel according to claim 1, wherein: the pressure holes (1) are equal in width and gradually increased in height from upstream to downstream, and the width of the pressure holes (1) is 0.3-0.4 times of the diameter of the vortex chamber (2).
3. A volute structure effective to reduce the height of a volute of a pressurized shaft cyclone tunnel according to claim 1 or 2, wherein: the bottom slope ratio of the pressure hole (1) is 1: 5-1: 6.
4. The volute structure for effectively reducing the height of the volute chamber of the pressure shaft swirl tunnel according to claim 1, wherein: the diffusion angle between the top plate (6) and the bottom plate (7) of the pressure hole (1) is not more than 4.5 degrees.
5. The volute structure for effectively reducing the height of the volute chamber of the pressure shaft swirl tunnel according to claim 1, wherein: the height of the joint of the pressure hole (1) and the vortex chamber (2) is not more than 0.4 time of the total height of the vortex chamber (2).
6. The volute structure for effectively reducing the height of the volute chamber of the pressure shaft swirl tunnel according to claim 1, wherein: the ventilation volume of the ventilation pipe (3) is 18-22% of the flow, and the wind speed of the ventilation pipe is not more than 60 m/s.
7. The volute structure for effectively reducing the height of the volute chamber of the pressure shaft swirl tunnel according to claim 1, wherein: gradual change section (4) be located directly under volute chamber (2), be shaft (5) directly under gradual change section (4), gradual change section (4) are with volute chamber (2) and shaft (5) smooth-going connection.
8. The volute structure for effectively reducing the height of the volute chamber of the pressure shaft swirl tunnel according to claim 1, wherein: the diameter of the volute chamber (2) is 1.2-1.4 times of that of the vertical shaft (5).
9. The volute structure for effectively reducing the height of the volute chamber of the pressure shaft swirl tunnel according to claim 1, wherein: the pressure hole (1), the volute chamber (2), the vent pipe (3), the gradual change section (4) and the vertical shaft (5) are all of reinforced concrete structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020860456.6U CN212742447U (en) | 2020-05-21 | 2020-05-21 | Vortex chamber structure capable of effectively reducing height of vortex chamber of pressure vertical shaft cyclone tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020860456.6U CN212742447U (en) | 2020-05-21 | 2020-05-21 | Vortex chamber structure capable of effectively reducing height of vortex chamber of pressure vertical shaft cyclone tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212742447U true CN212742447U (en) | 2021-03-19 |
Family
ID=75005017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020860456.6U Active CN212742447U (en) | 2020-05-21 | 2020-05-21 | Vortex chamber structure capable of effectively reducing height of vortex chamber of pressure vertical shaft cyclone tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212742447U (en) |
-
2020
- 2020-05-21 CN CN202020860456.6U patent/CN212742447U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2018291568A1 (en) | Annular multi-level free-fall-type energy-dissipating vertical shaft | |
| CN107059810B (en) | Bilateral flow is classified drop type energy dissipating drilled shaft | |
| CN102767164A (en) | Bidirectional inflow whirling current type shaft facility for flood discharge and energy dissipation in dam | |
| CN203411960U (en) | Glory hole spillway of reservoir | |
| CN202610774U (en) | Deep-hole cyclone shaft type flood drainage tunnel | |
| CN212742447U (en) | Vortex chamber structure capable of effectively reducing height of vortex chamber of pressure vertical shaft cyclone tunnel | |
| CN103669301B (en) | The height bank absorption basin of double-layer disperse energy dissipating | |
| CN103469772A (en) | Shaft type flood spillway for reservoirs | |
| CN201952787U (en) | Shaft well swirling flow energy dissipating and flood discharging hole for diving swirling flow generation pier | |
| CN107034978B (en) | Classification drop type rotational flow silo suitable for deep layer tunnel system | |
| CN111119139A (en) | Rotational flow shaft type energy dissipation structure | |
| CN201844154U (en) | Reinforced type swirler | |
| CN107964928A (en) | A kind of baffle pier structure using limbers deduction and exemption cavitation erosion | |
| CN104358304A (en) | Volute device for realizing orderly water drainage and waterlogging prevention in cities | |
| CN101881020A (en) | Method and device for dissipating energy by automatically adjusting flow through shaft of submerged rotating pier | |
| CN206385741U (en) | A kind of siphon drainge system for building | |
| CN113265991B (en) | Method for rebuilding multiple diversion tunnels into rotational flow vertical shaft flood discharge system | |
| CN113089600B (en) | Reduce whirl flood discharge hole of whirl hole export velocity of flow | |
| CN215290012U (en) | Energy dissipation structure of drop building | |
| CN209164793U (en) | A kind of construction drainage standpipe voltage regulation type inside spin plastic tube | |
| CN106704269B (en) | A kind of board-like racemization device mounted on water pump loudspeaker suction inlet | |
| CN207245754U (en) | The rotational flow silo of small flow water inlet pipe is set | |
| CN206800344U (en) | Energy dissipation by aeration and gas explosion-proof flood discharge device | |
| CN219943256U (en) | Screw type pressure-reducing water distribution spray head | |
| CN219887111U (en) | Drainage well with energy dissipation function suitable for direct current circulating power plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |