CN204327601U

CN204327601U - A kind of Steam injector

Info

Publication number: CN204327601U
Application number: CN201420788168.9U
Authority: CN
Inventors: 李剑清; 郭海军
Original assignee: HANGZHOU LONGDA VACUUM EQUIPMENT CO Ltd
Current assignee: HANGZHOU LONGDA VACUUM EQUIPMENT CO Ltd
Priority date: 2014-12-13
Filing date: 2014-12-13
Publication date: 2015-05-13
Anticipated expiration: 2024-12-13

Abstract

The utility model discloses a kind of Steam injector, its drip irrigation device comprises steam receiving chamber, nozzle, low pressure steam suction tude, vapor mixing room, diffusion pipeline, throat, described steam receiving chamber and nozzle is one-body molded and nozzle stretches into vapor mixing room, the sidewall of described mixing chamber offers low pressure steam pipeline, and vapor mixing room is towards the direction one-body molded formation diffusion pipeline of nozzle, described steam receiving chamber offers external thread section, described vapor mixing room offers internal thread segment, described external thread section and internal thread segment are threaded, and described external thread section offers vent.Steam jet ejector of the present utility model can clean nozzle while of can mixing more evenly.

Description

A kind of Steam injector

Technical field

The utility model relates to sparger field, and in particular, it relates to a kind of Steam injector.

Background technique

Steam jet ejector is a kind of device low pressure steam being boosted by high pressure steam, mainly utilize the energy interchange between high pressure steam and low pressure steam, reach the object that low pressure steam is boosted, steam jet ejector, because structure is simple, is invested little, reliable, the thermal efficiency is high, energy saving, is conducive to the features such as environmental protection, and being therefore widely used in thermo-compression evaporation, desalination of sea water, weaving, papermaking, oil, thermoelectricity etc. is in the industry of power with steam.The principal element affecting steam jet ejector jet performance has a lot, and as the nozzle of critical piece, its mounting point, physical dimension, the aspect such as clean are extremely important.

For traditional steam jet ejector, the position of nozzle is made to be fixing when designing, so operationally, poor to variable working condition adaptive capacity, when actual conditions and design load change to some extent, its service behaviour just there will be very large impaired condition, cause the fluctuation of service of whole system, decrease in efficiency, this is because all should to there being a best nozzle location at the high pressure steam of different operating mode, if jet expansion is less to the distance of mixing chamber, just there is no time enough and length injection low pressure steam, backflow phenomenon can be produced apart from during excessive injection low pressure steam, thus cause jet coefficient to reduce, have a strong impact on the efficiency of sparger.

And for traditional steam jet ejector, because the bore of nozzle is smaller, when a large amount of steam flows to this nozzle, can by impurities left a large amount of in steam at nozzle place, the rear nozzle of such this steam jet ejector of long-time use can by the impurity that remains to blocking, the use of steam jet ejector can be affected like this, easily cause the damage of nozzle.

In the prior art, there is the steam jet ejector that can carry out regulating nozzle location, solve the problem that can not regulate nozzle location under different operating mode, and in the prior art, also some technological schemes are had to achieve cleaning action to nozzle, but but do not have a kind of scheme to solve the above problems, therefore can inventor's imagination propose a kind of scheme and make steam jet ejector not only can regulate nozzle location simultaneously but also can clean nozzle simultaneously.

Model utility content

For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of a kind of Steam injector that not only can regulate the position of nozzle but also can realize cleaning nozzle function simultaneously.

For achieving the above object, the utility model provides following technological scheme: a kind of Steam injector, comprise steam receiving chamber, nozzle, low pressure steam suction tude, vapor mixing room, diffusion pipeline, throat, described steam receiving chamber and nozzle is one-body molded and nozzle stretches into vapor mixing room, the sidewall of described mixing chamber offers low pressure steam pipeline, and vapor mixing room is towards the direction one-body molded formation diffusion pipeline of nozzle, described steam receiving chamber offers external thread section, described vapor mixing room offers internal thread segment, described external thread section and internal thread segment are threaded, and described external thread section offers vent.

As preferably, the end of described steam receiving chamber and the end of vapor mixing room are also connected to flange plate.

As preferably, between described external thread section and female end, be also installed on seal ring.

As preferably, the inwall of described diffusion pipeline helically arranges towards throat and is formed with spiral chute.

As preferably, the outer wall of described throat has additional stiffening rib.

The utility model has following advantage compared to existing technology: the steam receiving chamber of steam jet ejector and nozzle one-body molded, steam receiving chamber and vapor mixing room are threaded connection, and on the locular wall of external thread section, offer vent, the adjustment of nozzle location can be realized like this by the propelling of screw thread by rotary steam receiving chamber, operating mode according to reality regulates the environment adapting to different operating parameter to nozzle, and in the process regulated, because the existence of vent, when under the propelling of nozzle at screw thread, when vent is no longer blocked, the steam of coming in from low pressure steam suction tude like this can enter nozzle by vent and spray from nozzle, a less backflow can be formed like this, so just can carry out a flushing to the impurity at nozzle place, thus the function of washer jet can be reached, can make simultaneously high pressure steam and low pressure steam proportions of ingredients more even, and the inwall of diffusion pipeline is provided with spiral chute, can make through the high pressure steam of diffusion pipeline and low pressure steam mixing more even, the outer wall of throat arranges stiffening rib and can effectively reduce the probability burst when throat is under pressure excessive.

Accompanying drawing explanation

Fig. 1 is the view that vent is opened;

Fig. 2 is the view that vent is closed.

In figure: 1, steam receiving chamber; 2, vapor mixing room; 3, nozzle; 4, low pressure steam suction tude; 5, vent; 6, diffusion pipeline; 7, throat; 8, stiffening rib; 9, external thread section; 10, internal thread segment; 11, flange plate; 12, spiral chute.

Embodiment

Referring to figs. 1 through Fig. 2, the embodiment of a kind of Steam injector of the utility model is described further.

As illustrated in fig. 1 and 2, steam jet ejector of the present utility model, the locular wall of vapor mixing room 2 is provided with internal thread segment 10, the locular wall of steam receiving chamber 1 offers external thread section 9, and nozzle 3 and steam receiving chamber 1 one-body molded, then nozzle 3 is made to be positioned at the indoor of vapor mixing room 2 by screw-thread fit precession vapor mixing room 2 steam receiving chamber 1, the vent 5 now offered on the locular wall of the external thread section 9 of steam receiving chamber 1 by the locular wall of vapor mixing room 2 to blocking, namely steam receiving chamber 1 is communicated with by means of only nozzle 3 with vapor mixing room 2, and on the inwall of diffusion pipeline 6, be provided with the helical identical with nozzle 3 direction arrange and form spiral chute 12, the air-flow of the existence generation spiral like this when high pressure steam and low pressure steam mix in diffusion pipeline 6 because of spiral chute 12 makes the more even of both mixing, and one-body moldedly on the outer side wall of throat 7 have stiffening rib 8, to be stressed maximum position because throat 7 is whole steam jet ejectors, therefore the possibility that stiffening rib 8 can effectively reduce throat 7 pressure-rupturable is set, substantially increase the Security of steam jet ejector of the present utility model, and also install between steam receiving chamber 1 and vapor mixing room 2 and be connected with flange plate 11, for steam receiving chamber 1 and vapor mixing room 2 being fixed when not needing adjustment nozzle 3 position, thus ensure the stability in use of steam jet ejector, as optimization is that the part be threaded at steam receiving chamber 1 and vapor mixing room 2 is also installed on seal ring (not shown), seal ring is preferably raw meal belt, raw meal belt is wrapped in the part be threaded, effectively can improve the connection sealing between vapor mixing room 2 and steam receiving chamber 1, and can make better to lock between them.

When using steam jet ejector, during beginning, vent 5 is blocked by the locular wall of vapor mixing room 2, namely steam receiving chamber 1 is communicated with by means of only nozzle 3 place with vapor mixing room 2, like this when high pressure steam enters from steam receiving chamber 1, then spray from nozzle 3 high speed, vapor mixing room 2 can be made like this to be in a negative pressure state, low pressure steam like this in low pressure steam suction tude 4 passively can be drawn in vapor mixing room 2 and mix with high pressure steam, brought into diffusion pipeline 6 by the high pressure steam poured always, when the pressure ratio design pressure of high pressure steam reduces relatively, the degree that pressure after nozzle 3 reduces diminishes, the negative pressure produced in vapor mixing room 2 also reduces relatively, be unfavorable for jetting steam caused suction, now unclamp flange plate 11, then rotary steam receiving chamber 1 makes nozzle 3 under the propelling of screw thread, more go deep into vapor mixing room 2 or counterrotating nozzle 3 is reduced with the distance of the entrance of vital qi mixing chamber 2, the optimum position of the corresponding now nozzle 3 of operating mode can be found out after such adjustment, can be conducive to improving the mass ratio of induced-to-inducing air under different operating mode like this, thus output meets the mixed vapour pressure of production requirement, when after long-time use steam jet ejector of the present utility model, at nozzle 3, place can remain more impurity, now can the vent 5 on locular wall be communicated with rotary steam receiving chamber 1 with vapor mixing room 2, namely as shown in Figure 1, enter into steam receiving chamber 1 like this to spray from nozzle 3 together with high pressure steam from the part low pressure steam of low pressure steam suction tude 4 from vent 5, impacting the mixing at nozzle 3 place like this makes the impurity remaining in nozzle 3 place be rinsed, so just can effective cleaning nozzle 3, improve the utilization efficiency of nozzle 3, and structure is simple, easy to operate.

Below just achieve steam jet ejector of the present utility model and not only can regulate the position of nozzle 3 but also can realize cleaning nozzle 3 function simultaneously, structure is simple, easy to operate, and improves the quality of steam jet ejector.

The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technological schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1. a Steam injector, comprise steam receiving chamber, nozzle, low pressure steam suction tude, vapor mixing room, diffusion pipeline, throat, described steam receiving chamber and nozzle is one-body molded and nozzle stretches into vapor mixing room, the sidewall of described mixing chamber offers low pressure steam pipeline, and vapor mixing room is towards the direction one-body molded formation diffusion pipeline of nozzle, it is characterized in that: described steam receiving chamber offers external thread section, described vapor mixing room offers internal thread segment, described external thread section and internal thread segment are threaded, and described external thread section offers vent.

2. a kind of Steam injector according to claim 1, is characterized in that: the end of described steam receiving chamber and the end of vapor mixing room are also connected to flange plate.

3. a kind of Steam injector according to claim 1, is characterized in that: be also installed on seal ring between described external thread section and female end.

4. a kind of Steam injector according to claim 1, is characterized in that: the inwall of described diffusion pipeline helically arranges towards throat and is formed with spiral chute.

5. a kind of Steam injector according to claim 1, is characterized in that: the outer wall of described throat has additional stiffening rib.