CN2153666Y

CN2153666Y - Multi-passage water-gas jet pump

Info

Publication number: CN2153666Y
Application number: CN 93201990
Authority: CN
Inventors: 王歆
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-01-17
Filing date: 1993-01-17
Publication date: 1994-01-19
Anticipated expiration: 2003-01-17

Abstract

The utility model discloses a sucking device which uses water as the power and is used in systems of utilities, containers, pipelines, etc. without air condensation. The utility model is composed of a water inlet pipe, a water nozzle, a sucking-in chamber and a throat pipe. The contracted section of the throat pipe is arranged on the lower part of the sucking-in chamber, and the end of the throat pipe is provided with a leaving velocity injection pump. The sucking device is characterized in that an air inlet pipe is communicated with an annular air distributing chamber, and an air guide pipe is connected for communication between the air distributing chamber and each air nozzle which is positioned on the periphery of the water nozzle. The air nozzle of the utility model can be in a chamfering structure, small holes are arranged on the wall of the annular air distributing chamber, and the contracted section of the throat pipe is in a streamline shape and is also provided with a buffering pressure equalizing chamber. A stirring fin is arranged in the throat pipe.

Description

Multi-passage water-gas jet pump

It is power that the utility model relates to a kind of water, as the aspirator of incondensable gas in the systems such as equipment, container, pipeline.The utility model is made of intake pipe, water nozzle, suction chamber, trunnion, in the suction chamber bottom trunnion contraction section is arranged, and trunnion is not held and is provided with the leaving velocity jet pump.

China utility model patent CN88211096.9 discloses a kind of low-consumption high-efficiency multichannel water-gas jet pump with the trunnion contraction section, though this patent has been improved the deficiency of original technology, have aspiration rising, advantage of low energy consumption, but this patent is still keeping in original technology ejection water (flow) direction vertical motion in the gas motion direction and water nozzle in the suction chamber, causes the deficiency of portion of energy loss.Secondly, the trunnion contraction section tube wall in this patent contacts with gas, aqueous mixtures and produces vibration, noise, and causes cavitation phenomenon in the part.

The purpose of this utility model provides a kind of prior art deficiency that overcomes, can make the moving direction that sucks air-flow (or most of air-flow) in the air chamber consistent with the water (flow) direction that sprays through the water nozzle or roughly consistent, improve the multichannel water-gas jet pump of suction chamber air-flow suction effect; Another purpose of the present utility model is by improving trunnion contraction section structure, to reduce or to improve water in the trunnion contraction section, gas mixture a fluid stream car and the caused vibration of contacting of tube wall, noise and cavitation phenomenon.

The purpose of this utility model adopts following measure to realize: the suction tude of jet pump is communicated with annular gas distributing chamber, gas distributing chamber be each positioned at the gas blowout on every side of water nozzle and have air pipe to be communicated with between chewing.

The purpose of this utility model also can realize by following measure:

Gas blowout is chewed and is the structure of cutting sth. askew.Make the tangential suction of gas along water nozzle ejection water bundle, tiltedly Wrong Shipment is moving in opposite directions to have strengthened the interior particle of the water bundle periphery and the air-flow ring of encirclement, has strengthened the gas-vapor mix ability.

Also can open number row apertures on the wall that annular gas distributing chamber and suction chamber are separated by in the utility model, this can further reduce the air motion resistance.

Trunnion contraction section of the present utility model is streamlined, and water, air flow stream are lowered by resistance.Buffering is set on the trunnion contraction section all presses the chamber, can avoid or reduce vibration and noise, alleviate cavitation phenomenon greatly.All press the structure of chamber can be about buffering referring to accompanying drawing and follow-up explanation.

Trunnion inwall of the present utility model is provided with the flow-disturbing fin.The effect one of this fin is to increase disturbance, impels gas, water to mix, and can prevent that gasification from separating accumulation, improves compression efficiency; Secondly can prevent that air mass that bottom air water a fluid stream takes place from building up and air mass on move.

Advantage of the present utility model is as follows:

1, mixing chamber air-flow in the prior art, current crisscross motion have been solved and the water beam deflection that causes causes the energy loss that causes with the aditus laryngis bump.Increase the area of contact of air water, improved the capacity for work of pumping efficiency and water bundle.

Show by experiment that 2, the utility model can improve the degree of vacuum of the system of being sucked.

3, reduce noise, vibration by the improvement that trunnion is shunk, and reduced the cavitation erosion tendency.

4, because the trunnion inwall is provided with the disturbance fin, can improve compression efficiency, stop air mass the segregation of trunnion portion, accumulation and on move.

Description of drawings:

Fig. 1 is the utility model plan view.Fig. 1 also is a Figure of abstract.Fig. 2 be Figure 1A-A to sectional view, Fig. 3 is the gentle nozzle partial sectional view of water nozzle.Fig. 4 all presses the partial sectional view of chamber for trunnion contraction section and buffering.

The utility model elaborates by reference to the accompanying drawings:

Water inlet pipe 1 has that example is 7 among several water nozzles 2(figure in the utility model). Have gas blowout to chew 3 around water nozzle 2, its practical structures is the gas flow that is positioned at water nozzle periphery.

Air inlet pipe

12 and 4 conductings of annular gas distributing chamber. There is wireway 14 to be communicated with between ring-like gas distributing chamber 4 and the gas nozzle 3. The outer wall 24 that 3 outer wall 22 length are slightly larger than water nozzle 2 is chewed in gas blowout, forms thus the structure of cutting sth. askew that (relatively water nozzle ejection gas bundle) chewed in gas blowout, referring to Fig. 3. The wall 20 of being separated by at annular gas distributing chamber 4 suction chambers 5 has number row aperture, preferably establishes 3 rows, 16 holes of every row, and the aperture is φ 16～20mm. Suction chamber is provided with the trunnion contraction section 6 that buffering is all pressed chamber 27 for 5 times. Trunnion contraction section 6 and buffering all press the structure of chamber 27 referring to Fig. 4, it is in go to the bottom each trunnion position on 29 of suction chamber shell 28 with outside sealing to be set, shell 28 internal upper parts are established trunnion contraction section 6, shell 28 fixed choke 26 on 21 of going to the bottom, and wherein 6 of trunnion 26 and contraction sections have a clearance space 29. The optimum size in gap 29 is 1～2mm. Have the guide hole 21 that several are communicated with contraction section inner space 31 and chamber 27 on the tube wall 30 of trunnion contraction section 6. The axis of guide hole 21 should tilt with the axis of contraction section 6, preferably tangential along streamlined tube wall 30. Guide hole the best is set to 6 φ 3mm holes. Be provided with disturbance fin 25 at trunnion 26 inwalls. 25 sections optimum lengths of fin are 3 times of trunnion internal diameters.

Operation principle of the present utility model is as follows:

Water under high pressure enters water nozzle 2 and sprays into suction chamber 5 from water pipe 1, chews 3 places generation negative pressure in gas blowout simultaneously a large amount of gases are sucked from annular gas distributing chamber 4. Tiltedly Wrong Shipment is moving in opposite directions because the structure of cutting sth. askew that gas blowout is chewed makes water bundle periphery and air-flow ring of encirclement internal layer particle. Both strengthened the mixing wastewater with air ability, and made again water more concentrated under gas enclosure effect, Avoids or reduces the water bundle the splashing of suction chamber base plate, cause the flow separation rebound phenomena, make current can enter smoothly the trunnion section. Because the negative pressure of suction chamber 5 makes again the residual gas in the annular gas distributing chamber open in the aperture suction chamber 5 on wall 20.

The gas-liquid mixture 23 that enters trunnion contraction section 6 flows in the trunnion 26 by streamlined tube wall 30. When gas pressure change takes place, because buffering all presses gap 29 and guide hole 21 in the chamber 27 to consist of Buffer loop can be eliminated pressure and change, and makes on the aditus laryngis downforce consistent, and this section cavitation of both having avoided (or reducing) can be eliminated again because flow velocity increases gas that the step-down that produces causes separates and build up the phenomenon of wafing on the segregation, has improved simultaneously pumping efficiency.

Gas, water combined beam at trunnion 26 have increased disturbance between air water under the effect of disturbance fin, impel gas, water to mix, and can prevent that the gas that betides this section in the prior art from separating accumulation, and reduce the deficiency of compression efficiency.

An exemplary embodiments of the present utility model.

Adopt the accompanying drawing structure, water nozzle diameter phi 30mm, trunnion 26 length are 70 times of nozzle diameters, the water design discharge is＞450 meters ³/ h, inlet gauge pressure 0.3MPa, this moment, suction chamber degree of vacuum was lower than 0.004MPa.

Claims

1, a kind of multichannel water-gas jet pump, constitute by intake pipe, water nozzle, suction chamber, trunnion, the bottom, chamber is put in suction has trunnion to receive section, the trunnion end has the leaving velocity jet pump, it is characterized in that the suction tude bottom is communicated with annular gas distributing chamber, gas distributing chamber be each positioned at gas blowout around the water nozzle and have air pipe to be communicated with between chewing.

2, multichannel water according to claim 1-gas jet pump is characterized in that gas blowout chews outlet and be the structure of cutting sth. askew.

3, multichannel water according to claim 2-gas jet pump is characterized in that the wall that annular gas distributing chamber and suction chamber are separated by is provided with number row aperture.

4, according to claim 1 or 2 or 3 described multichannel water-gas jet pumps, it is characterized in that described trunnion contraction section is streamlined.

5, multichannel water according to claim 4-gas jet pump is characterized in that described trunnion contraction section is provided with buffering and all presses the chamber.

6, multichannel water according to claim 5-gas jet pump is characterized in that inner tube wall is provided with the flow-disturbing fin.