CN211599122U

CN211599122U - Ejector for centrifugal jet vacuum pump

Info

Publication number: CN211599122U
Application number: CN201922115189.XU
Authority: CN
Inventors: 张怀明
Original assignee: Wuhan Wu Pump Pump Manufacturing Co ltd
Current assignee: Wuhan Wu Pump Pump Manufacturing Co ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-09-29
Anticipated expiration: 2029-11-28

Abstract

The utility model discloses an injector for centrifugal jet vacuum pump, a tip of injection pipe is provided with the external screw thread, the inside internal thread that is connected with the screw-thread fit that is provided with of one end of outer diffusion tube, the injection pipe carries out threaded connection through external screw thread and interior screw-thread fit in inserting outer diffusion tube, be provided with the cavity in the injection pipe, the both ends of cavity are formed with diffusion chamber section and shrink chamber section respectively, the inner wall of diffusion chamber section is provided with the first guide plate that a plurality of annular distribute, the inner wall of shrink chamber section is provided with the second guide plate that a plurality of annular distribute. The utility model discloses beneficial effect: the utility model discloses the both ends of sprayer cavity are formed with diffusion chamber section and shrink chamber section respectively, and diffusion chamber section and shrink chamber section are provided with first guide plate and second guide plate respectively, and shrink chamber section and diffusion chamber section compress the back respectively the fluid and highly penetrate the injection, can improve fluid suction speed like this, and first guide plate and second guide plate are convenient for the fluid and inhale in the injection pipe.

Description

Ejector for centrifugal jet vacuum pump

Technical Field

The utility model belongs to the technical field of jet vacuum pump technique and specifically relates to an ejector for centrifugal jet vacuum pump.

Background

The jet vacuum pump is used for mass transfer and energy transfer by utilizing the shearing and turbulent diffusion effects of jet, has no rotating part, has simple structure, reliable work, low manufacturing cost and low operation and maintenance cost, and is commonly used in occasions needing vacuum pumping, such as power plants, chemical engineering, tobacco, salt making and the like. The working principle of the jet vacuum pump determines that the efficiency of the jet vacuum pump is low, and researches show that the efficiency of the jet pump can be effectively improved by adopting pulse fluid as the working power of the jet vacuum pump, and the jet vacuum pump in the form is called as a pulse jet vacuum pump.

The jet vacuum pump needs to adopt an ejector and an injection pipe, the diameters of inner cavities of the ejector and the injection pipe in the prior art are consistent, and meanwhile, a guide plate is not arranged, so that the fluid is not beneficial to being pumped and the injection speed is not improved.

Therefore, there is a need for an ejector for a centrifugal jet vacuum pump that addresses the above problems.

SUMMERY OF THE UTILITY MODEL

To the not enough of existence among the above-mentioned prior art, the utility model aims to provide an ejector for centrifugal jet vacuum pump to solve above-mentioned problem.

The utility model provides an injector for centrifugal jet vacuum pump, includes injection pipe and outer diffuser, an end of injection pipe is provided with the external screw thread, the inside internal thread that is connected with the external screw thread cooperation that is provided with in one end of outer diffuser, the injection pipe inserts and carries out threaded connection through external screw thread and interior screw-thread fit in the outer diffuser, be provided with the cavity in the injection pipe, the both ends of cavity are formed with diffusion chamber section and shrink chamber section respectively, the intermediate part of cavity is the larynx section, the inner wall of diffusion chamber section is provided with the first guide plate of a plurality of annular distributions, the inner wall of shrink chamber section is provided with the second guide plate of a plurality of annular distributions.

Preferably, the injection pipe is provided with a first limit stop ring close to the outer wall of the external thread.

Preferably, the other end of the injection pipe is provided with a second limit stop ring.

The beneficial effects of the preferable technical scheme are as follows: the first limiting blocking ring and the second limiting blocking ring play a limiting role when the injection pipe is inserted into the outer diffusion pipe.

Preferably, an inlet mouth is arranged at one end part of the outer diffusion pipe.

The beneficial effects of the preferable technical scheme are as follows: the inlet nozzle has a small pipe opening, and is convenient for suction.

Preferably, the internal diameters of the throat section are both smaller than the internal diameters of the diffusion cavity section and the contraction cavity section.

Preferably, the cross-sectional shapes of the diffusion cavity section and the contraction cavity section are both conical.

The beneficial effects of the preferable technical scheme are as follows: this allows the fluid to be compressed and then injected diffusely within the injection tube.

Compared with the prior art, the utility model discloses beneficial effect: the utility model discloses the both ends of sprayer cavity are formed with diffusion chamber section and shrink chamber section respectively, and diffusion chamber section and shrink chamber section are provided with first guide plate and second guide plate respectively, and shrink chamber section and diffusion chamber section compress the back respectively the fluid and highly penetrate the injection, can improve fluid suction speed like this, and first guide plate and second guide plate are convenient for the fluid and inhale in the injection pipe.

Drawings

FIG. 1 is a schematic diagram of an ejector for a centrifugal jet vacuum pump according to the present invention;

FIG. 2 is a view showing the structure of the injection tube of the present invention;

FIG. 3 is a view showing the inner structure of the injection tube according to the present invention;

fig. 4 is a left side view of the injection tube of the present invention;

FIG. 5 is a right side view of the injector tube of the present invention;

fig. 6 is an internal structure view of the outer diffuser of the present invention.

Reference numbers in the figures: 1. an injection pipe; 2. an outer diffuser tube; 3. an external thread; 4. an internal thread; 5. a diffusion chamber section; 6. a contracting cavity section; 7. a throat section; 8. a first limit stop ring; 9. a second limit stop ring; 10. A first baffle; 11. a second baffle; 12. an inlet nozzle.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of 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 therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. 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," "second," etc. 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 otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 1 and fig. 2 to 6, an injector for a centrifugal jet vacuum pump includes an injection pipe 1 and an outer diffusion pipe 2, wherein an external thread 3 is provided at one end of the injection pipe 1, an internal thread 4 cooperatively connected with the external thread 3 is provided inside one end of the outer diffusion pipe 2, the injection pipe 1 is inserted into the outer diffusion pipe and is threadedly connected with the internal thread 4 through the external thread 3 in a matching manner, a cavity is provided in the injection pipe 1, a diffusion cavity section 5 and a contraction cavity section 6 are respectively formed at two ends of the cavity, a throat section 7 is provided at a middle part of the cavity, a plurality of first guide plates 10 annularly distributed are provided on an inner wall of the diffusion cavity section 5, and a plurality of second guide plates 11 annularly distributed are provided on an inner wall of the contraction cavity section 6.

Further, a first limit stop ring 8 is arranged on the outer wall of the injection pipe 1 close to the external thread 3.

Further, the other end of the injection pipe 1 is provided with a second limit stop ring 9.

The beneficial effects of the further technical scheme are that: the first limit stop ring 8 and the second limit stop ring 9 play a role in limiting the injection pipe 1 when the injection pipe is inserted into the outer diffusion pipe 2.

Further, an inlet nozzle 12 is arranged at one end of the outer diffusion pipe 2.

The beneficial effects of the further technical scheme are that: the inlet nozzle has a small pipe opening, and is convenient for suction.

Further, the inner diameters of the throat section 7 are smaller than those of the diffusion cavity section 5 and the contraction cavity section 6.

Further, the cross-sectional shapes of the diffusion cavity section 5 and the contraction cavity section 6 are both conical.

The beneficial effects of the further technical scheme are that: this allows the fluid to be injected in the injection pipe 1 by first being pressurized in a constricted manner and then being injected in a diffused manner.

Compared with the prior art, the utility model discloses beneficial effect: the utility model discloses the both ends of injection pipe 1 cavity are formed with diffusion chamber section 5 and shrinkage cavity section 6 respectively, and diffusion chamber section 5 and shrinkage cavity section 6 are provided with first guide plate 10 and second guide plate 11 respectively, and shrinkage cavity section 6 and diffusion chamber section 5 compress the back respectively the fluid and highly penetrate the injection, can improve fluid suction speed like this, and first guide plate 10 and second guide plate 11 are convenient for the fluid and inhale in the injection pipe.

The working principle is as follows: one end of the fluid entering the injection pipe 1 through the inlet nozzle 12 is pressurized through the contraction cavity section 6, and is injected at a high speed through the diffusion cavity section 5 after passing through the throat section 7.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.

Claims

1. An ejector for a centrifugal jet vacuum pump, characterized by: including injection pipe (1) and outer diffuser (2), a tip of injection pipe (1) is provided with external screw thread (3), the inside internal thread (4) of being connected with external screw thread (3) cooperation that is provided with of one end of outer diffuser (2), threaded connection is carried out through external screw thread (3) and internal thread (4) cooperation in injection pipe (1) inserts the outer diffuser, be provided with the cavity in injection pipe (1), the both ends of cavity are formed with diffusion chamber section (5) and shrink chamber section (6) respectively, the intermediate part of cavity is larynx section (7), the inner wall of diffusion chamber section (5) is provided with first guide plate (10) that a plurality of annular distribute, the inner wall of shrink chamber section (6) is provided with second guide plate (11) that a plurality of annular distribute.

2. An ejector for a centrifugal jet vacuum pump as claimed in claim 1, wherein: the injection pipe (1) is provided with a first limit stop ring (8) close to the outer wall of the external thread (3).

3. An ejector for a centrifugal jet vacuum pump as claimed in claim 1, wherein: and the other end part of the injection pipe (1) is provided with a second limit stop ring (9).

4. An ejector for a centrifugal jet vacuum pump as claimed in claim 1, wherein: an inlet nozzle (12) is arranged at one end part of the outer diffusion pipe (2).

5. An ejector for a centrifugal jet vacuum pump as claimed in claim 1, wherein: the inner diameters of the throat section (7) are smaller than those of the diffusion cavity section (5) and the contraction cavity section (6).

6. An ejector for a centrifugal jet vacuum pump as claimed in claim 1, wherein: the cross sections of the diffusion cavity section (5) and the contraction cavity section (6) are both conical.