CN203067361U - Improved back shaft stretching type tubular device - Google Patents
Improved back shaft stretching type tubular device Download PDFInfo
- Publication number
- CN203067361U CN203067361U CN 201320031193 CN201320031193U CN203067361U CN 203067361 U CN203067361 U CN 203067361U CN 201320031193 CN201320031193 CN 201320031193 CN 201320031193 U CN201320031193 U CN 201320031193U CN 203067361 U CN203067361 U CN 203067361U
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- China
- Prior art keywords
- water
- straight
- water inlet
- guide vane
- back shaft
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- Expired - Fee Related
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Abstract
The utility model discloses an improved back shaft stretching type tubular device, and belongs to the technical field of water pump devices. The back shaft stretching type tubular device is composed of a water inflow pool, a straight type water inflow pipe, straight guide vanes, a straight guide vane body, an impeller, an impeller chamber, a rear guide vane, a rear guide vane body, a water outflow bend pipe section, a pump shaft, a transmission device, a power machine, a siphoning type water outflow pipe, a vacuum break valve, a water outflow pool and the like. The device is characterized in that the water inflow pipe is a straight type water inflow pipe, the front guide vane body is a straight guide vane body provided with straight guide vanes, the straight guide vane body takes the shape of a truncated cone which shrinks step by step form the water inflow to the water outflow, and the shrinking angle is 4-8 degrees. The straight type water inflow pipe can provide a favorable water inflow condition to a water pump, the straight guide vanes can control the circumferential flow velocity of the inflow stream, cut off the backflow continuity in the impeller inflow, improve the water inflow condition of the water pump, and improve the pumping head under a small flow rate condition; and the vacuum break valve is mounted at the top of the siphoning type water outflow pipe, so that the cutting off of water flow is safe and reliable, the installation, maintenance and operation management of the water pump device are convenient, and the safety and reliability of the operation of the tubular pump device are improved.
Description
Technical field
The utility model relates to the tubular pump structural type, and particularly the water inlet flow channel of back shaft extension formula tubular pump and the structure of diffuser belong to the pumping plant technical field.
Background technique
The rated lift of tubular pump is lower, but the device H-Max may be higher, when working under low flow rate condition, may enter into the range of instability of pump, causes the unit operation instability, reduces the Security of pumping plant.
Existing tubular pump, mainly by water inlet pool, water inlet flow channel, power engine, blade wheel chamber, transmission device, pump shaft, impeller, vacuum breaker valve, the rear guide vane body, Discharging bent-tube, composition such as siphon outlet conduit and water outlet pool, water inlet pool, water inlet flow channel, blade wheel chamber, the rear guide vane body, Discharging bent-tube, siphon outlet conduit is connected successively with water outlet pool, power engine is arranged on outside the Discharging bent-tube after the blade wheel chamber, power engine is connected with the impeller-driven of blade wheel chamber with pump shaft by transmission device, vacuum breaker valve is installed at the top of siphon outlet conduit, under low flow rate condition, lift on the impeller different radii is unequal, secondary back and circumferential flow velocity appear in import, reduce lift of pump, cause vibration, influence performance and the stability of pump performance.
The model utility content
The purpose of this utility model is in order to guarantee that water pump has good water inlet condition, being convenient to unit installs and overhauls, reduce the interrupter device investment, make things convenient for unit operation, administer and maintain, the improved back shaft extension formula tubular pump structural type of safe operation under a kind of low flow rate condition is provided.
The purpose of this utility model is to realize like this, a kind of improved back shaft extension formula tubular pump, comprise the water inlet pool that connects successively, water inlet flow channel, straight diffuser, blade wheel chamber, the rear guide vane body, Discharging bent-tube, siphon outlet conduit and water outlet pool, power engine arranges outside the Discharging bent-tube after the blade wheel chamber, power engine is by the impeller rotation of transmission device and pump shaft drives impeller chamber, vacuum breaker valve is installed at the top of siphon outlet conduit, it is characterized in that, described water inlet flow channel is the straighttube-type water inlet flow channel, described straight diffuser is the straight diffuser that is provided with straight stator, straight diffuser is frustoconic shape, progressively shrinks to outlet from import, and angle of throat is 4～8 degree.
The quantity of described straight stator is 4～8, evenly arranges along circumference, is fixed in the straight diffuser.
Described straighttube-type water inlet flow channel and siphon outlet conduit are reinforced concrete construction.
Described straight diffuser and Discharging bent-tube are the built-in metal structural member.
The utility model has adopted the straighttube-type water inlet flow channel, can provide good water inlet condition for water pump, straight stator in the straight diffuser can suppress the circumferential flow velocity of impeller inlet current, improve water pump water inlet condition, cut off the continuity that import refluxes, improve the pumping head under the low flow rate condition, vacuum breaker valve is installed at the siphon outlet conduit top, reliable cutout mode can be provided, make things convenient for pumping plant installation, maintenance and operation management, save pumping plant construction investment and maintenance cost, improve Security and the reliability of tubular pump operation.When the utility model start was used, current through bulkhead gate, entered the straighttube-type water inlet flow channel from water inlet pool, through straight diffuser, flow into the water pump vane chamber again, the water body that obtains energy is discharged from the outlet of rear guide vane body, enter siphon outlet conduit from the Discharging bent-tube section, final row's turnover pond.When unit orderly closedown or accidental shutdown, vacuum breaker valve is opened automatically, cuts off current.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation at the utility model blade wheel chamber position.
Among the figure: 1. water inlet pool; 2. bulkhead gate; 3. straighttube-type water inlet flow channel; 4. straight stator; 5. straight diffuser; 6. impeller; 7. blade wheel chamber; 8. rear guide vane; 9. rear guide vane body; 10. Discharging bent-tube; 11. water pump spindle; 12. transmission device; 13. power engine; 14. siphon outlet conduit; 15. water outlet pool; 16. vacuum breaker valve.
Embodiment
A kind of improved back shaft extension formula tubular pump is made up of water inlet pool, straighttube-type water inlet flow channel, straight stator, straight diffuser, impeller, blade wheel chamber, rear guide vane, rear guide vane body, Discharging bent-tube section, pump shaft, transmission device, power engine, siphon outlet conduit, vacuum breaker valve and water outlet pool etc.Water inlet pool, water inlet flow channel, preceding diffuser, blade wheel chamber, rear guide vane body, Discharging bent-tube, siphon outlet conduit are connected successively with water outlet pool, power engine arranges outside the Discharging bent-tube after the blade wheel chamber, power engine is connected with the impeller-driven of blade wheel chamber with pump shaft by transmission device, vacuum breaker valve is installed at the top of siphon outlet conduit, described water inlet flow channel is the straighttube-type water inlet flow channel, preceding diffuser is the straight diffuser that is provided with straight stator, straight diffuser is frustoconic shape, progressively shrink to outlet from import, angle of throat is 4～8 degree.The quantity of straight stator is 4～8, evenly arranges along circumference, is fixed in the straight diffuser.Described straighttube-type water inlet flow channel and siphon outlet conduit are reinforced concrete construction.Described straight diffuser and Discharging bent-tube are the built-in metal structural member.
Before starting water pump, open bulkhead gate 2, vacuum breaker valve 16 is in closed condition.After water pump assembly starts, power engine 13 drives water pump spindle 11 rotations by transmission device 12, impeller 6 work, the mechanical energy of power engine is converted into potential energy and the kinetic energy of water body, and current through bulkhead gate 2, enter straighttube-type water inlet flow channel 3 from water inlet pool 1, flow to water pump vane chamber 7 through straight diffuser 5, discharge from the outlet of rear guide vane body 8, enter siphon outlet conduit 14 by Discharging bent-tube section 10, finally enter water outlet pool 15.When water pump assembly orderly closedown or accidental shutdown, vacuum breaker valve 16 is opened automatically, cuts off current, guarantees the safety of water pump assembly.At low flow rate condition, straight stator in the straight stator 4 straight diffusers in the straight diffuser 5, the circumferential flow velocity that can suppress the import current, improve water pump water inlet condition, can cut off the continuity that impeller 6 imports reflux, improve the pump head under the low flow rate condition, improve Security and the reliability of tubular pump operation.
Claims (4)
1. improved back shaft extension formula tubular pump, comprise the water inlet pool that connects successively, water inlet flow channel, straight diffuser, blade wheel chamber, the rear guide vane body, Discharging bent-tube, siphon outlet conduit and water outlet pool, power engine arranges outside the Discharging bent-tube after the blade wheel chamber, power engine is by the impeller rotation of transmission device and pump shaft drives impeller chamber, vacuum breaker valve is installed at the top of siphon outlet conduit, it is characterized in that, described water inlet flow channel is the straighttube-type water inlet flow channel, described straight diffuser is the straight diffuser that is provided with straight stator, straight diffuser is frustoconic shape, progressively shrink to outlet from import, angle of throat is 4～8 degree.
2. a kind of improved back shaft extension formula tubular pump according to claim 1 is characterized in that the quantity of described straight stator is 4～8, evenly arranges along circumference, is fixed in the straight diffuser.
3. a kind of improved back shaft extension formula tubular pump according to claim 1 is characterized in that described straighttube-type water inlet flow channel and siphon outlet conduit are reinforced concrete construction.
4. a kind of improved back shaft extension formula tubular pump according to claim 1 is characterized in that described straight diffuser and Discharging bent-tube are the built-in metal structural member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320031193 CN203067361U (en) | 2013-01-22 | 2013-01-22 | Improved back shaft stretching type tubular device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320031193 CN203067361U (en) | 2013-01-22 | 2013-01-22 | Improved back shaft stretching type tubular device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203067361U true CN203067361U (en) | 2013-07-17 |
Family
ID=48766151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320031193 Expired - Fee Related CN203067361U (en) | 2013-01-22 | 2013-01-22 | Improved back shaft stretching type tubular device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203067361U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465001A (en) * | 2016-01-25 | 2016-04-06 | 扬州大学 | Laterally horizontal type shaft extension pump device with rear motor and application method of laterally horizontal type shaft extension pump device |
| CN105975729A (en) * | 2016-06-06 | 2016-09-28 | 扬州大学 | Method for eliminating water outlet flow channel deviation of large-flow inclined axial-flow pump station |
-
2013
- 2013-01-22 CN CN 201320031193 patent/CN203067361U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465001A (en) * | 2016-01-25 | 2016-04-06 | 扬州大学 | Laterally horizontal type shaft extension pump device with rear motor and application method of laterally horizontal type shaft extension pump device |
| CN105465001B (en) * | 2016-01-25 | 2017-05-24 | 扬州大学 | Laterally horizontal type shaft extension pump device with rear motor and application method of laterally horizontal type shaft extension pump device |
| CN105975729A (en) * | 2016-06-06 | 2016-09-28 | 扬州大学 | Method for eliminating water outlet flow channel deviation of large-flow inclined axial-flow pump station |
| CN105975729B (en) * | 2016-06-06 | 2017-07-18 | 扬州大学 | A kind of method for eliminating big flow inclined axial-flow-pump station outlet passage bias current |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20160122 |
|
| EXPY | Termination of patent right or utility model |