阅读说明：本技术 一种对夹式环隙引射器 (Wafer type annular gap ejector ) 是由 张云光 汪蕾 熊运涛 叶华伦 岳志坚 罗仁江 王敏 杨帆 罗欣 郑鑫 于 2021-08-04 设计创作，主要内容包括：本发明公开了一种对夹式环隙引射器,所述引射器包括下环、上环以及环状密封圈,所述下环与所述上环嵌套安装形成环形流道和环形空隙,所述上环上设有进气通孔,所述进气通孔与所述环形流道连接,所述环形空隙远离所述下环中轴线的一端与所述环形流道之间形成环形开口,所述环形空隙沿所述下环的中轴线方向的空隙逐渐减小,直至所述下环的下环壁与所述上环的上表面之间形成环形出口；其中,所述环状密封圈用于将所述下环与所述上环的接触面密封。本发明解决了现有技术中引射器结构复杂、体积大及安装不便的问题,达到了一种体积小、安装方便且引射效率高的引射器。(The invention discloses a wafer type annular gap ejector, which comprises a lower ring, an upper ring and an annular sealing ring, wherein the lower ring and the upper ring are nested and installed to form an annular flow passage and an annular gap; wherein, the annular sealing ring is used for sealing the contact surface of the lower ring and the upper ring. The ejector solves the problems of complex structure, large volume and inconvenient installation of the ejector in the prior art, and achieves the ejector with small volume, convenient installation and high ejection efficiency.)

1. The opposite-clamping type annular gap ejector is characterized by comprising a lower ring (2), an upper ring (1) and an annular sealing ring (3), wherein the lower ring (2) and the upper ring (1) are nested to form an annular runner (8) and an annular gap (9), the upper ring (1) is provided with an air inlet through hole, the air inlet through hole is connected with the annular runner (8), an annular opening is formed between one end, far away from the central axis of the lower ring (2), of the annular gap (9) and the annular runner (8), and the annular gap (9) is gradually reduced along the central axis direction of the lower ring (2) until an annular outlet is formed between the lower ring wall of the lower ring (2) and the upper surface of the upper ring; wherein the annular sealing ring (3) is used for sealing the contact surface of the lower ring (2) and the upper ring (1).

2. The wafer-type annular gap injector as claimed in claim 1, characterized in that the inclination of the annular structural surfaces forming the annular gap (9) increases.

3. The wafer-type annular gap injector of claim 1, wherein the annular outlet has a cross-sectional area less than a cross-sectional area of the annular opening.

4. The wafer type annular gap ejector according to claim 1, wherein the slope of the inner ring wall surface of the upper ring (1) increases first and then decreases, a sleeve is arranged at one end of the end surface of the upper ring (1) close to the central axis, and the sleeve is welded and fixed with the end surface of the upper ring (1).

5. The wafer type annular gap ejector according to claim 1, wherein gaskets (5) are arranged on end faces of the lower ring (2) and the upper ring (1), flanges (4) are arranged on the gaskets (5) of the lower ring (2) and the upper ring (1), and the flanges (4) are used for fixedly connecting the lower ring (2) and the upper ring (1).

6. The wafer type annular gap ejector according to claim 5, wherein a jacket pipe is arranged on the upper ring (1), an inner pipe and an outer pipe of the jacket pipe form an annular cavity, a delivery pipe and an outlet pipe (6) are arranged on the outer pipe, and the delivery pipe and the outlet pipe (6) are distributed up and down and are distributed opposite to the outer pipe.

7. The wafer-type annular gap injector according to claim 6, characterized in that the two ends of the jacket tube are provided with annular blocks welded to the wall of the upper ring (1) of the inner tube and to the wall of the lower ring (2) of the outer tube.

8. The wafer type annular gap ejector according to claim 6, wherein a top cover is arranged right above the jacket sleeve, a cavity is arranged in the top cover, a port corresponding to the delivery pipe is arranged on the left side face of the cavity, and the delivery pipe is connected with the port.

9. The wafer-type annular gap ejector according to claim 8, wherein an inlet pipe is arranged on the right side face of the top cover, and the horizontal position of the inlet pipe is higher than that of the conveying pipe.

10. The wafer-type annular gap ejector according to claim 6, wherein the jacket pipe is of a straight-through structure, and the jacket pipe realizes multi-stage conveying of the ejector through cascade connection.

Technical Field

The invention relates to an ejector, in particular to a wafer type annular gap ejector.

Background

The ejector is a fluid device which utilizes the kinetic energy exchange of two fluids to achieve the purposes of fluid conveying, negative pressure establishment and the like. The annular space ejector has the advantages of high efficiency, low noise and the like.

Chinese patent application No. 201510982055.1 discloses an annular gap ejector. Although it adds an adjusting mechanism for adjusting the annular space area to adapt to the field working condition. But the structure is complex, the volume is large, and the installation and the use are inconvenient.

Chinese patent application No. 201710278955.7 discloses a circular seam ejector. The improvement is made in the aspects of optimizing the flow passage and reducing the volume. But still bulky and not suitable for jacketed piping.

Disclosure of Invention

The invention aims to solve the problems, and therefore provides the wafer type annular gap ejector which is small in size and convenient to install.

The technical purpose of the invention is realized by the following technical scheme: the opposite-clamping type annular gap ejector comprises a lower ring, an upper ring and an annular sealing ring, wherein the lower ring and the upper ring are nested and installed to form an annular flow channel and an annular gap, an air inlet through hole is formed in the upper ring and connected with the annular flow channel, an annular opening is formed between one end, away from the central axis of the lower ring, of the annular gap and the annular flow channel, and the annular gap is gradually reduced along the central axis direction of the lower ring until an annular outlet is formed between the lower ring wall of the lower ring and the upper surface of the upper ring; wherein, the annular sealing ring is used for sealing the contact surface of the lower ring and the upper ring.

By adopting the technical scheme, the ejectors in the prior art are various, such as a jacketed pipe ejector, an annular seam ejector and the like, and as for the jacketed pipe ejector, the annular seam ejector and the annular seam ejector, a plurality of air chambers or cavities are arranged in the ejectors, so that the volume is invisibly increased, and the structure is more complex. Through the inner structure of lower ring and last ring, install it nestedly, just form a ring shape passageway and a toroidal gap in the inside of lower ring and last ring, establish an inlet through-hole on last ring, inlet through-hole is connected with this annular runner, through inlet through-hole input air current entering annular runner, because the volume of annular runner is great, and the volume of annular space will be far less than the volume of annular runner, consequently, behind the air current through annular runner, form an annular air current, be the annular high velocity air current by the annular space blowout, make the mid portion of the export of annular space form vacuum environment, make the gas that is penetrated from being sucked out and air current mixing discharge. Because only one annular flow channel and an annular gap are involved, the internal structure of the ejector obviously reduces the volume of the ejector.

Further, the inclination rate of the annular structural surface forming the annular gap is gradually increased.

By adopting the technical scheme, when annular high-speed airflow is formed, the airflow is ensured to flow upwards in the annular gap.

Further, the cross-sectional area of the annular outlet is smaller than the cross-sectional area of the annular opening.

By adopting the technical scheme, the airflow formed at the annular outlet has higher speed.

Further, the slope of the inner ring wall surface of the upper ring is increased and then decreased, a sleeve is arranged at one end, close to the central axis, of the end surface of the upper ring, and the sleeve is welded and fixed with the end surface of the upper ring.

By adopting the technical scheme, the arc-shaped wall surface protruding along the central axis direction of the upper ring enables airflow to form a wall surface effect at the annular outlet, and the sleeve forms a pressurizing chamber as the extension of the arc-shaped wall surface, so that the injection efficiency is improved.

Further, the terminal surface of lower ring and fitting with a contraceptive ring is equipped with the gasket, all be equipped with the ring flange on the gasket of lower ring and fitting with a contraceptive ring, the ring flange be used for with lower ring and fitting with a contraceptive ring fixed connection.

Adopt above-mentioned technical scheme, the ring flange will be interior to put on a ring fixed clip tightly, prevents to put on a ring separation in when letting in the air current.

Further, be equipped with the double-layered sleeve pipe on the upper ring, double-layered sheathed tube inner tube and outer tube form annular cavity, be equipped with conveyer pipe and outlet pipe on the outer tube, conveyer pipe and outlet pipe distribute from top to bottom and for the outer tube heteropleural distribution.

By adopting the technical scheme, the jacketed pipe is used for conveying the injected fluid, and the conveying pipe and the outlet pipe are used for conveying the heat tracing gas.

Furthermore, two ends of the jacket sleeve are provided with annular blocks, and the annular blocks are welded with the upper annular wall of the inner pipe and the lower annular wall of the outer pipe.

Further, a top cover is arranged right above the jacket sleeve, a cavity is arranged in the top cover, an interface corresponding to the conveying pipe is arranged on the left side face of the cavity, and the conveying pipe is connected with the interface.

Furthermore, an inlet pipe is arranged on the right side face of the top cover, and the horizontal position of the inlet pipe is higher than that of the conveying pipe.

Furthermore, the jacketed pipe is of a straight-through structure, and multi-stage conveying is realized through cascade connection of the jacketed pipes.

By adopting the technical scheme, the ejector with the straight-through structure has smaller resistance loss compared with the ejector in the prior art, the jacketed pipe with the straight-through structure is easier to arrange pipes compared with the ejector in the prior art, the ejector can be used in a cascade mode, and the fluid conveying distance is increased.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the wafer type annular gap ejector, the annular gap and the annular flow channel are realized by nesting the upper ring and the lower ring, the lower ring and the upper ring are fixedly connected through the two flange plates, fluid conveying is realized through the jacket pipe, various air chambers in the wafer type annular gap ejector are omitted integrally compared with the prior art, only one annular flow channel, the annular gap and the jacket pipe with a straight-through structure are provided, and the size of the ejector is greatly reduced.

2. According to the oppositely-clamped annular gap ejector, the ports of the clamping sleeves of the two ejectors are connected through the flange plate, so that the plurality of ejectors can be connected, and the conveying distance of the ejectors can be provided.

3. According to the wafer type annular space ejector, the jacket pipe adopts the straight-through pipeline, compared with a right-angle pipeline in the prior art, the pipeline with the straight-through structure has small resistance to fluid, and the transmission efficiency is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an axial cross-sectional view of the eductor of the present invention;

FIG. 3 is a schematic diagram of a cascade connection of an eductor according to the present invention;

reference numbers and corresponding part names in the drawings: 1. ring fitting; 2. a lower ring; 3. an annular seal ring; 4. a flange plate; 5. a gasket; 6. an outlet pipe; 7. an air inlet; 8. an annular flow passage; 9. an annular void.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Examples

As shown in fig. 1, a wafer-type annular gap injector is provided, which includes a lower ring 2, an upper ring 1 and an annular sealing ring 3, the lower ring 2 and the upper ring 1 are nested to form an annular flow passage 8 and an annular gap 9, the upper ring 1 is provided with an air inlet through hole, the air inlet through hole is connected with the annular flow passage 8, an annular opening is formed between one end of the annular gap 9 far from the central axis of the lower ring 2 and the annular flow passage 8, and the annular gap 9 is gradually reduced along the central axis of the lower ring 2 until an annular outlet is formed between the lower ring wall of the lower ring 2 and the upper surface of the upper ring 1; the annular seal ring 3 is used for sealing the contact surface between the lower ring 2 and the upper ring 1.

In this embodiment, through the inner structures of the lower ring 2 and the upper ring 1, the lower ring 2 and the upper ring 1 are nested and mounted, a circular channel and a circular gap are formed inside the lower ring 2 and the upper ring 1, an air inlet through hole is formed in the upper ring 1, the air inlet through hole is connected with the annular flow channel 8, airflow is input through the air inlet through hole and enters the annular flow channel 8, and due to the fact that the volume of the annular flow channel 8 is large and the volume of the annular gap 9 is far smaller than that of the annular flow channel 8, an annular airflow is formed after the airflow passes through the annular flow channel 8, the annular gap 9 ejects high-speed airflow in a circular shape, the middle part of an outlet of the annular gap 9 forms a vacuum environment, and the ejected gas is sucked out from the middle and is mixed with the airflow to be discharged. And the annular gap can be replaced by circumferentially distributed fine holes, and the technical effect is the same.

A gradual increase of the annular construction surface forming the annular interspace 9. When the annular high-speed airflow is formed, the airflow is ensured to flow upwards in the annular gap.

The cross-sectional area of the annular outlet is smaller than the cross-sectional area of the annular opening. So that the gas flow formed at the annular outlet has a higher velocity.

The slope of the inner ring wall surface of the upper ring 1 is increased and then reduced, a sleeve is arranged at one end, close to the central axis, of the end surface of the upper ring 1, and the sleeve and the end surface of the upper ring 1 are welded and fixed

As shown in fig. 2, the end surfaces of the lower ring 2 and the upper ring 1 are provided with gaskets 5, the gaskets 5 of the lower ring 2 and the upper ring 1 are provided with flanges 4, and the flanges 4 are used for fixedly connecting the lower ring 2 and the upper ring 1.

As shown in fig. 1, a jacket pipe is arranged on the upper ring 1, an annular cavity is formed by an inner pipe and an outer pipe of the jacket pipe, a conveying pipe and an outlet pipe 6 are arranged on the outer pipe, and the conveying pipe and the outlet pipe 6 are distributed up and down and are distributed opposite to the outer pipe. The inlet pipe of the outer pipe of this embodiment is used for feeding steam into the annular cavity, the outlet pipe 6 is used for discharging steam, and some fluids need to be ventilated with heat, such as for the liquid sulfur pool. The ejector is small in size and axial size, heat dissipation of the ejector can be omitted, and the pipeline for heat tracing arranged in the outer pipe avoids adding a complex heat tracing channel in the ejector through input and output of steam.

And two ends of the clamping sleeve are provided with annular blocks, and the annular blocks are welded with the wall of the upper ring 1 of the inner pipe and the wall of the lower ring 2 of the outer pipe. The implementation ensures that air in heat tracing does not flow out from the end part of the jacketed pipe, so that the heat tracing capacity of the end part is poor, and certain fluids form solids to be deposited in the inner pipe of the jacketed pipe due to temperature reduction.

As shown in fig. 1, a top cover is arranged right above the jacket sleeve, a cavity is arranged in the top cover, and a port corresponding to the delivery pipe is arranged on the left side surface of the cavity and connected with the delivery pipe. This embodiment is located when outdoor and the ejector needs vertical use when the place of use of ejector, and the top sets up a conical top cap, can prevent that the rainwater from dripping to the inner tube of ejector, reduces the transmission efficiency of its inner tube, and the conveyer pipe design also can play the supporting role to the top cap for concave pipeline.

As shown in fig. 1, the right side surface of the top cover is provided with an inlet pipe having a horizontal position higher than that of the delivery pipe. The inlet pipe of this embodiment is used for the steam input, passes through the cavity in the top cover, then is input into the annular cavity by the conveying pipe, and finally is output by the outlet pipe 6.

As shown in figure 3, the jacketed pipe is of a straight-through structure, and the jacketed pipe realizes multi-stage conveying through cascade connection. Compared with the ejector in the prior art, the ejector with the sleeve pipe of the embodiment in the straight-through structure has smaller resistance loss, and compared with the ejector in the prior art, the sleeve pipe of the straight-through structure is easier to arrange pipes. A plurality of ejectors are connected in series for use, and the distance from the inlet to the outlet is increased, so that the conveying distance of the fluid is increased.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.