CN109869356A - Electric steam injector - Google Patents

Electric steam injector Download PDF

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Publication number
CN109869356A
CN109869356A CN201711285529.2A CN201711285529A CN109869356A CN 109869356 A CN109869356 A CN 109869356A CN 201711285529 A CN201711285529 A CN 201711285529A CN 109869356 A CN109869356 A CN 109869356A
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CN
China
Prior art keywords
nozzle
steam inlet
steam
throat
pipe
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.)
Pending
Application number
CN201711285529.2A
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Chinese (zh)
Inventor
李伟
李金峰
尚德敏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HIT (HARBIN INSTITUTE OF TECHNOLOGY) KINT TECHNOLOGY Co Ltd
Original Assignee
HIT (HARBIN INSTITUTE OF TECHNOLOGY) KINT TECHNOLOGY Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HIT (HARBIN INSTITUTE OF TECHNOLOGY) KINT TECHNOLOGY Co Ltd filed Critical HIT (HARBIN INSTITUTE OF TECHNOLOGY) KINT TECHNOLOGY Co Ltd
Priority to CN201711285529.2A priority Critical patent/CN109869356A/en
Publication of CN109869356A publication Critical patent/CN109869356A/en
Pending legal-status Critical Current

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Abstract

The present invention provides a kind of electric steam injector, its structure includes: diffuser pipe, nozzle, suction chamber;Nozzle arrangements include: jet expansion, nozzle throat, nozzle steam inlet pipe, nozzle mandrel, casing, driving steam inlet, steam inlet pipe screw thread;The connection of the entrance of suction chamber housing outlets and diffuser pipe, the throat of the other end connection diffuser pipe of diffuser pipe entrance, the other end of throat connect diffuser pipe outlet section;The inside one end of nozzle core axis is in coniform, it is directed toward the nozzle throat for being located at steam inlet pipe end in coniform tip, nozzle mandrel the preceding paragraph screw thread is threadedly engaged with steam inlet pipe, steam inlet pipe is attached to internal surface of sleeve pipe and can slide, casing is inserted and fixed from sucking room housing, casing connects nozzle entrance in the opening of suction chamber enclosure interior, and jet expansion is directed toward throat's entrance of diffuser pipe, it is characterised in that: the structure of electric steam injector further includes rotating to adjust unit and pull to adjust unit.

Description

Electric steam injector
Technical field
The present invention relates to heat power engineerings, more particularly to a kind of electric steam injector.
Background technique
Steam jet ejector is using high steam draws low pressure steam, to improve setting by the low-pressure steam pressure of injection It is standby.
Steam jet ejector is simple and reliable for structure, running expense is cheap and is widely used, as vacuum system, refrigeration are followed Ring, chemical industry, the propulsion system of rocket and jet airplane or even core cooling system of nuclear power plant etc..
Steam jet ejector be widely used in weaving, papermaking, petroleum, thermoelectricity etc. using steam as the industry of power in, mainly For promoting steam circulation, low-pressure steam pressure is improved.
The enterprise of these industries may be present in a factory or workshop due to generating low-pressure steam in process of production The steam of a variety of level of pressure, steam jet ejector can improve the pressure of low-pressure steam using the available energy of high steam.
The low-pressure steam that mistake is put with high steam energy regenerating recycles the flash steam etc. of condensed water in high temperature, thus by different The integrated steam of level of pressure reaches significant energy-saving effect.
Such as:
1, there are self-contained thermoelectric plant in many large and medium-sized enterprise, by the pumping of steam turbine, back pressure steam supply.But due to Design of Steam Turbine Extraction pressure (back-pressure) be it is fixed, often occur steam turbine steam supply can not meet production needed for situation, drawn with vapour vapour Emitter can be boosted to using the steam extraction or steam discharge of boiler live steam injection steam turbine meets user's requirement.
2, steam exhaust and waste heat recycling: using the steam of the steam ejection lower pressure of elevated pressures, intermediate a certain pressure is obtained The steam of power, to achieve the purpose that low product high use or UTILIZATION OF VESIDUAL HEAT IN.
In production technology, recycles steam exhaust and reduce emptying, save steam consumption.
3, condensed water and flash steam recycling: add thermogenetic condensed water and flash steam to recycle steam in production technology, steam Vapour boosting.
4, while injection low-pressure steam, it can be used as temperature-decreased pressure reducer and the requirement to desuperheat hydraulic pressure reduce.
Currently, having following two disadvantages with more steam jet ejector seen in engineering in the market:
1, in performance adjustment, two important parameters of injector are to be bound together, i.e. area of nozzle throat and spray Mouth position adjusts together, and when area of nozzle throat becomes smaller, nozzle location moves forward simultaneously.
This adjustment relationship is usually unable to satisfy actual needs, i.e. steam jet ejector cannot often work in optimum state, Cause the efficiency of steam jet ejector relatively low.
2, since the driving steam parameter of injector often changes, steam jet ejector is frequently necessary to adjust, manual adjustment labor Fatigue resistance is very big.
Summary of the invention
A kind of electric steam injector, its structure include: diffuser pipe, nozzle, suction chamber, rotation adjusting unit and pulling Adjust unit.
Diffuser pipe structure includes: outlet section, prismatic throat, the tapered entrance of flaring.
Nozzle arrangements include: jet expansion, nozzle throat, nozzle steam inlet pipe, nozzle mandrel, casing, drive steam into vapour Mouth, steam inlet pipe screw thread.
Suction chamber structure includes: sucking room housing, air intake.
The connection of the entrance of suction chamber housing outlets and diffuser pipe, the larynx of the other end connection diffuser pipe of diffuser pipe entrance The other end in portion, throat connects diffuser pipe outlet section.
The inside one end of nozzle core axis is in coniform, nozzle throat of the coniform tip direction positioned at steam inlet pipe end, nozzle Mandrel the preceding paragraph screw thread is threadedly engaged with steam inlet pipe, and steam inlet pipe is attached to internal surface of sleeve pipe and can slide.
Casing is inserted and fixed from sucking room housing, and casing connects nozzle entrance, spray in the opening of suction chamber enclosure interior Throat's entrance of diffuser pipe is directed toward in mouth outlet, and casing has driving steam inlet on the side wall of suction chamber hull outside tube body.
The nozzle steam inlet pipe, it is attached to internal surface of sleeve pipe, and can retreat sliding, is not able to rotate, and steam inlet pipe is inwardly close to expansion The end of pressure pipe side, is connected with nozzle entrance.
There is an end plate in the end of the outside side of steam inlet pipe, and end plate central has a steam inlet pipe screw thread, and there are also several into vapour on end plate Hole, for driving steam to enter nozzle steam inlet pipe.
The rotation adjusts unit, its structure includes: sliding sleeve, clockwise and anticlockwise motor.
One end cap of sliding sleeve is on the output shaft of clockwise and anticlockwise motor, and another end cap of sliding sleeve is in nozzle core axial direction On the spindle nose of outer one end, sliding sleeve transmits the torque between two spindle noses at sleeve both ends, two spindle noses by the key of sliding The distance between variation can be slided in sliding sleeve.
The pulling adjusts unit, its structure includes: worm screw, worm gear, clockwise and anticlockwise motor, motion thread.
Clockwise and anticlockwise motor drives worm and worm wheel, and by being located at the motion thread of worm gear inner hole, drive nozzle mandrel is retreated, Nozzle steam inlet pipe and nozzle is driven to retreat simultaneously, the distance of adjustment jet expansion to diffuser pipe throat entrance.
Detailed description of the invention
Fig. 1 is the overall pattern of electric steam injector embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples, present invention is further described in detail.
Fig. 1 gives the overall pattern of electric steam injector embodiment of the present invention.
Electric steam injector of the present invention is mainly made of five parts: diffuser pipe 10, nozzle 20, suction chamber 30, rotation are adjusted It saves unit 40, pull adjusting unit 50.
The structure of diffuser pipe 10 includes: outlet section 12, prismatic throat 14, the tapered entrance 16 of flaring.
The structure of nozzle 20 include: jet expansion 21, nozzle steam inlet pipe 23, nozzle mandrel 22, casing 24, driving steam into Steam ports 25, steam inlet pipe screw thread 28.
Smallest cross-sectional between jet expansion 21 and nozzle steam inlet pipe 23 is nozzle throat, and nozzle throat front end connects nozzle Entrance.
Nozzle mandrel 22 transfers to retreat in 54 inward turning of motion thread, and the top of nozzle mandrel 22 is cone, cone point Portion is directed toward nozzle throat, it enters or leaves nozzle throat, and the circulation area of nozzle throat just becomes smaller or larger, and effect is to adjust The circulation area of whole nozzle throat.
The structure of suction chamber 30 includes: sucking room housing 32, air intake 34.
The structure that rotation adjusts unit 40 includes: sliding sleeve 41, clockwise and anticlockwise motor 42.
The function of sliding sleeve 41 is only to transmit the torque between two spindle noses at sleeve both ends by the key of sliding, And the distance between two spindle noses can slide variation.
Pulling and adjusting the structure of unit 50 includes: worm screw 51, worm gear 53, clockwise and anticlockwise motor 52, motion thread 54.
Motion thread 54 is coarse-pitch thread clockwise, under the drive of clockwise and anticlockwise motor 42, by sliding sleeve 41, clockwise Nozzle mandrel 22 is rotated, due to the effect of motion thread 54, nozzle mandrel 22 promotes quickly into sucking room housing 32;Into vapour Pipe screw thread 28 is fine thread clockwise, when rotating clockwise nozzle mandrel 22, due to steam inlet pipe screw thread 28 and motion thread 54 Collective effect, nozzle steam inlet pipe 23 are pushed ahead relatively slow.
So when rotating clockwise nozzle mandrel 22, total effect is
1, nozzle steam inlet pipe 23 is pushed ahead together with jet expansion 21, the entrance of jet expansion 21 to diffuser pipe throat 14 Distance reduces;
2, meanwhile, the coniform tip of nozzle mandrel 22 also reduces with nozzle throat distance, i.e., nozzle throat circulation area becomes It is small.
Steam jet ejector of the invention, by sliding sleeve 41, is turned clockwise under the drive of clockwise and anticlockwise motor 42 After dynamic nozzle mandrel 22, the variation of nozzle throat circulation area is fixed.That is, adjusting unit 40 by rotation, first adjust Good nozzle throat circulation area.
Then, clockwise and anticlockwise motor 42 is motionless, and clockwise and anticlockwise motor 52 is activated individually, and passes through worm screw 51, worm gear 53 and transmission spiral shell Line 54 drives nozzle mandrel 22 to retreat, while nozzle steam inlet pipe 23 and nozzle being driven to retreat, so that it may adjust jet expansion 21 To the distance of diffuser pipe throat entrance.
As it can be seen that the flexible adjustment of steam jet ejector of the present invention, easily can individually adjust nozzle throat circulating face Distance of the long-pending and adjusting jet expansion to diffuser pipe throat entrance.

Claims (4)

1. a kind of electric steam injector, its structure includes: diffuser pipe, nozzle, suction chamber;Diffuser pipe structure includes: flaring Outlet section, prismatic throat, tapered entrance;Nozzle arrangements include: jet expansion, nozzle throat, nozzle steam inlet pipe, Nozzle mandrel, casing, driving steam inlet, steam inlet pipe screw thread;Suction chamber structure includes: sucking room housing, air intake;Sucking Room housing outlet is connect with the entrance of diffuser pipe, and the other end of diffuser pipe entrance connects the throat of diffuser pipe, throat it is another One end connects diffuser pipe outlet section;For the inside one end of nozzle core axis in coniform, coniform tip, which is directed toward, is located at steam inlet pipe end Nozzle throat, nozzle mandrel the preceding paragraph screw thread are threadedly engaged with steam inlet pipe, and steam inlet pipe is attached to internal surface of sleeve pipe and can slide, casing from Sucking room housing is inserted and fixed, and casing connects nozzle entrance in the opening of suction chamber enclosure interior, and jet expansion is directed toward diffusion Throat's entrance of pipe, casing have driving steam inlet on the side wall of suction chamber hull outside tube body, it is characterised in that: electronic The structure of steam jet ejector further includes that rotation adjusts unit and pulls adjusting unit.
2. a kind of steam jet ejector described in accordance with the claim 1, it is characterised in that: the nozzle steam inlet pipe, it is attached to casing Inner wall, can retreat sliding, not be able to rotate, and steam inlet pipe inwardly close to the end of diffuser pipe side, is connected with nozzle entrance;Into vapour There is an end plate in the end for managing outside side, and end plate central has a steam inlet pipe screw thread, and there are also several admission openings on end plate, steams for driving Vapour enters nozzle steam inlet pipe.
3. a kind of steam jet ejector described in accordance with the claim 1, it is characterised in that: the rotation adjusts unit, its structure It include: sliding sleeve, clockwise and anticlockwise motor;One end cap of sliding sleeve on the output shaft of clockwise and anticlockwise motor, sliding sleeve it is another For one end cap on the spindle nose of the outside one end of nozzle core axis, sliding sleeve transmits two spindle noses at sleeve both ends by the key of sliding Between torque, the distance between two spindle noses can slide variation in sliding sleeve.
4. a kind of steam jet ejector described in accordance with the claim 1, it is characterised in that: the pulling adjusts unit, its structure It include: worm screw, worm gear, clockwise and anticlockwise motor, motion thread;Clockwise and anticlockwise motor drives worm and worm wheel, by being located at worm gear inner hole Motion thread, drive nozzle mandrel to retreat, while nozzle steam inlet pipe and nozzle being driven to retreat, adjustment jet expansion to diffuser pipe The distance of throat's entrance.
CN201711285529.2A 2017-12-02 2017-12-02 Electric steam injector Pending CN109869356A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711285529.2A CN109869356A (en) 2017-12-02 2017-12-02 Electric steam injector

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Application Number Priority Date Filing Date Title
CN201711285529.2A CN109869356A (en) 2017-12-02 2017-12-02 Electric steam injector

Publications (1)

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CN109869356A true CN109869356A (en) 2019-06-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110566937A (en) * 2019-09-29 2019-12-13 中国华电科工集团有限公司 steam-water injection type temperature and pressure reducing device and method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0565900A (en) * 1991-09-06 1993-03-19 Toshiba Corp Steam injector
CN2499130Y (en) * 2001-09-13 2002-07-10 四川省科学城高达测控公司 Adjustable steam ejector
CN101829639A (en) * 2010-05-28 2010-09-15 杜战奇 Injector with adjustable distance between nozzle and mixing chamber inlet and adjustable nozzle critical sectional area
CN102121482A (en) * 2011-01-26 2011-07-13 双良节能系统股份有限公司 Nozzle-adjustable steam ejector
CN103775393A (en) * 2014-02-24 2014-05-07 余文凌 Injection pump with annular nozzle provided with adjustable width during running
CN205090049U (en) * 2015-11-09 2016-03-16 中国石油集团川庆钻探工程有限公司 Sliding type torque transmission device
CN207795704U (en) * 2017-12-02 2018-08-31 哈尔滨工大金涛科技股份有限公司 Electric steam injector

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0565900A (en) * 1991-09-06 1993-03-19 Toshiba Corp Steam injector
CN2499130Y (en) * 2001-09-13 2002-07-10 四川省科学城高达测控公司 Adjustable steam ejector
CN101829639A (en) * 2010-05-28 2010-09-15 杜战奇 Injector with adjustable distance between nozzle and mixing chamber inlet and adjustable nozzle critical sectional area
CN102121482A (en) * 2011-01-26 2011-07-13 双良节能系统股份有限公司 Nozzle-adjustable steam ejector
CN103775393A (en) * 2014-02-24 2014-05-07 余文凌 Injection pump with annular nozzle provided with adjustable width during running
CN205090049U (en) * 2015-11-09 2016-03-16 中国石油集团川庆钻探工程有限公司 Sliding type torque transmission device
CN207795704U (en) * 2017-12-02 2018-08-31 哈尔滨工大金涛科技股份有限公司 Electric steam injector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110566937A (en) * 2019-09-29 2019-12-13 中国华电科工集团有限公司 steam-water injection type temperature and pressure reducing device and method

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