CN203131054U - Cutoff device - Google Patents
Cutoff device Download PDFInfo
- Publication number
- CN203131054U CN203131054U CN 201320099382 CN201320099382U CN203131054U CN 203131054 U CN203131054 U CN 203131054U CN 201320099382 CN201320099382 CN 201320099382 CN 201320099382 U CN201320099382 U CN 201320099382U CN 203131054 U CN203131054 U CN 203131054U
- Authority
- CN
- China
- Prior art keywords
- door
- cutoff
- conservancy diversion
- pipeline
- water conservancy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
A cutoff device comprises an outflow pipeline (4) and a flow guiding pier (9). A rotary shaft (2) is arranged in the flow guiding pier (9). A cutoff door (1) is arranged above the rotary shaft (2), a counter weight (3) is arranged below the rotary shaft (2), a breast wall (8) for limiting the maximum opening degree of the cutoff door is arranged on the top of the flow guiding pier (9), and a first limit device (6) and a second limit device (7) are arranged on two lateral walls of the flow guiding pier (9). The cutoff device has the advantage that the breast wall can effectively prevent water flow from flowing backwards when a downstream water level is too high and controls a door closing position and closing time of the cutoff door with the side wall limit devices. The volume of a buffering pond limits backward flow quantity from a water outlet pipeline outlet and reduces impact and damage of backward flowing water to a water pump unit, and the backward flow is prevented from causing the unit to run away. The water outlet pipeline outlet is communicated with the atmosphere directly through the buffering pond in front of the breast wall, and negative pressure is prevented from being generated in a water outlet pipeline effectively. Great impact force generated during closing of the cutoff door is acted on a pond side wall, impact on the pipeline outlet is reduced, and the service life of the pipeline is prolonged.
Description
Technical field
The utility model relates to cut-off device.
Background technique
Flap valve is because it has simple in structure, low cost, the strong advantage of automation is widely used in the cutout of some large pumping station straighttube-types or the formula outlet passage of going down on one's knees.But traditional free style flap valve has following three big defectives: the one, because the narrow limitation of design principle, the opening angle of flap valve is less, the loss of head of water outlet is big, when the flap valve opening angle is 40 °, the motor output power loss that causes has reached 2%-3%, and the opening angle of general large pump station flap valve also has only 60 °-80 °, so the loss of head that common flap valve causes is very huge; The 2nd, under hydraulic pressure and flap valve deadweight effect, produce big impact force when shutting down, flap valve itself and hydraulic structure are caused bigger harm; The 3rd, the flap valve force bearing point is concentrated, and localized stress is bigger, easy care not, and working life is short.
Prior art has been carried out some improvement to flap valve, but concrete summary is got up or had significant limitation.Such as the flap valve of band counterweight, opening angle can reach about 50 °, but during compressor emergency shutdown, the shut-in time of flap valve and momentary angular speed increase, and the impact force of closing the door increases greatly, and must be furnished with vent when installing; Though the double-joint type flap valve improves to some extent, owing to the middle hinge place leaks the cutout effect is reduced, impact force can not be ignored when closing; Hydraulic cushion formula flap valve technology maturation, but cost is too high, in application great limitation etc. is arranged.Also have some side turn over flap valves, can reduce the outlet port loss of head to a certain extent, but still fail to have breakthrough at aspects such as the minimizing of closing an impact force even eliminations, working life is shorter.
The model utility content
The purpose of this utility model provides and a kind ofly can prevent that outer water from pouring in down a chimney, ensureing the pumping plant safe operation, reducing self to the cut-off device of the inhibition of water outlet to greatest extent.
The utility model cut-off device, comprise: outflow tube road 4 and water conservancy diversion pier 9, establish rotating shaft 2 in the described water conservancy diversion pier 9, rotating shaft 2 tops are provided with cutout door 1, rotating shaft 2 belows are provided with counterweight 3, described water conservancy diversion pier 9 tops are provided with the breastwork 8 for the maximum folding degree of restriction cutout door, also are provided with first spacing 6, second spacing 7 on the two side of described water conservancy diversion pier 9.
Distance between described rotating shaft 2 and outflow tube road 4 mouths of pipe is 2-3 times of outflow tube road 4 radiuses.
Described first spacing 6 and the rotating range of the second spacing 7 cutout door that limits be 10 °-80 °.
Described cutout door 1 is buffering pond 5 near a side in outflow tube road 4 and the space that water conservancy diversion pier 9 surrounds, and 5 tops, described buffering pond and atmosphere communicate.
Shutting down because of water pump assembly in the process that causes water outlet current generation refluence, beginning was against turning under the counterweight effect before this for the cutout door, and final effect ShiShimonoseki apolipsis at the stream that falls to sluice is positioned at breastwork.
The advantage of the utility model cut-off device is: breastwork can not only guarantee effectively to stop flow backwards when the level of tail water is too high, also with spacing the closing a position and shut-in time of together controlling the cutout door of limit wall; The capacity limit in buffering pond the flow that is flow backwards by outlet conduit outlet, weakened the body that sluices to the impact failure of water pump assembly, the phenomenon of having avoided unconfined refluence to cause unit to fly to escape; The outlet conduit outlet is led directly to atmosphere by the buffering pond before the breastwork, effectively prevents from producing in outlet conduit negative pressure, and in addition, the huge impact force that the cutout door produces when closing acts on the wall of limit, pond, alleviates the bump to pipe outlet, prolongs pipeline life.
Description of drawings
Fig. 1 is the main TV structure schematic representation of the utility model cut-off device.
Fig. 2 is the plan structure schematic representation of the utility model cut-off device.
Fig. 3 is the right TV structure schematic representation of the utility model cut-off device.
Wherein: 1 is cutout door, and 2 are rotating shaft, and 3 be counterweight, and 4 be the outflow tube road, and 5 is to cushion the pond, and 6 is first spacing, and 7 is second spacing, and 8 is breastwork, and 9 is the water conservancy diversion pier.
Embodiment
Embodiment one
Below in conjunction with accompanying drawing, the utility model is further specified: shown in Fig. 1-3, a kind of cut-off device, comprise outflow tube road 4 and water conservancy diversion pier 9, establish rotating shaft 2 in the described water conservancy diversion pier 9, rotating shaft 2 tops are provided with cutout door 1, and rotating shaft 2 belows are provided with counterweight 3, described water conservancy diversion pier 9 tops are provided with the breastwork 8 for the maximum folding degree of restriction cutout door, also are provided with first spacing 6, second spacing 7 on the two side of described water conservancy diversion pier 9.
Distance between described rotating shaft 2 and outflow tube road 4 mouths of pipe is 2 times of outflow tube road 4 radiuses.
Described first spacing 6 and the rotating range of the second spacing 7 cutout door that limits be 10 °-80 °.
Described cutout door 1 is buffering pond 5 near a side in outflow tube road 4 and the space that water conservancy diversion pier 9 surrounds, and 5 tops, described buffering pond and atmosphere communicate.
Embodiment two
Below in conjunction with accompanying drawing, the utility model is further specified: shown in Fig. 1-3, a kind of cut-off device, comprise outflow tube road 4 and water conservancy diversion pier 9, establish rotating shaft 2 in the described water conservancy diversion pier 9, rotating shaft 2 tops are provided with cutout door 1, and rotating shaft 2 belows are provided with counterweight 3, described water conservancy diversion pier 9 tops are provided with the breastwork 8 for the maximum folding degree of restriction cutout door, also are provided with first spacing 6, second spacing 7 on the two side of described water conservancy diversion pier 9.
Distance between described rotating shaft 2 and outflow tube road 4 mouths of pipe is 3 times of outflow tube road 4 radiuses.
Described first spacing 6 and the rotating range of the second spacing 7 cutout door that limits be 10 °-80 °.
Described cutout door 1 is buffering pond 5 near a side in outflow tube road 4 and the space that water conservancy diversion pier 9 surrounds, and 5 tops, described buffering pond and atmosphere communicate.
Claims (4)
1. cut-off device, comprise outflow tube road ⑷ and water conservancy diversion pier ⑼, establish rotating shaft ⑵ in the described water conservancy diversion pier ⑼, it is characterized in that: rotating shaft ⑵ top is provided with cutout door ⑴, rotating shaft ⑵ below is provided with counterweight ⑶, described water conservancy diversion pier ⑼ top is provided with the breastwork ⑻ for the maximum folding degree of restriction cutout door, also is provided with the first spacing ⑹, the second spacing ⑺ on the two side of described water conservancy diversion pier ⑼.
2. cut-off device as claimed in claim 1 is characterized in that: the distance between described rotating shaft ⑵ and the outflow tube road ⑷ mouth of pipe be outflow tube road ⑷ radius 2-3 doubly.
3. cut-off device as claimed in claim 1, it is characterized in that: the rotating range of the cutout door that the described first spacing ⑹ and the second spacing ⑺ limit is 10 °-80 °.
4. cut-off device as claimed in claim 1 is characterized in that: for cushioning pond ⑸, ⑸ top, described buffering pond and atmosphere communicate described cutout door ⑴ near the side of outflow tube road ⑷ and space that water conservancy diversion pier ⑼ surrounds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320099382 CN203131054U (en) | 2013-03-05 | 2013-03-05 | Cutoff device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320099382 CN203131054U (en) | 2013-03-05 | 2013-03-05 | Cutoff device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203131054U true CN203131054U (en) | 2013-08-14 |
Family
ID=48939034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320099382 Expired - Fee Related CN203131054U (en) | 2013-03-05 | 2013-03-05 | Cutoff device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203131054U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105546130A (en) * | 2016-02-26 | 2016-05-04 | 山东省水利科学研究院 | Automatic control valve, indoor negative pressure relief device and reservoir drainage tunnel management room |
| CN110453651A (en) * | 2019-09-10 | 2019-11-15 | 扬州大学 | A kind of butterfly valve type flap valve and its application method for reversible passage |
| CN112461533A (en) * | 2020-11-25 | 2021-03-09 | 扬州大学 | Door flap head loss experiment testing system and using method thereof |
-
2013
- 2013-03-05 CN CN 201320099382 patent/CN203131054U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105546130A (en) * | 2016-02-26 | 2016-05-04 | 山东省水利科学研究院 | Automatic control valve, indoor negative pressure relief device and reservoir drainage tunnel management room |
| CN105546130B (en) * | 2016-02-26 | 2017-09-15 | 山东省水利科学研究院 | Indoor negative pressure alleviates device and Water reservoir water draining hole management house |
| CN110453651A (en) * | 2019-09-10 | 2019-11-15 | 扬州大学 | A kind of butterfly valve type flap valve and its application method for reversible passage |
| CN110453651B (en) * | 2019-09-10 | 2024-06-04 | 扬州大学 | Butterfly valve type flap valve for bidirectional flow passage and application method thereof |
| CN112461533A (en) * | 2020-11-25 | 2021-03-09 | 扬州大学 | Door flap head loss experiment testing system and using method thereof |
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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: 20130814 Termination date: 20150305 |
|
| EXPY | Termination of patent right or utility model |