CN113187770B

CN113187770B - Water jet air extractor

Info

Publication number: CN113187770B
Application number: CN202110634998.0A
Authority: CN
Inventors: 郭孝国
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2022-06-17
Anticipated expiration: 2041-06-08
Also published as: CN113187770A

Abstract

A water jet air exhaust device belongs to the technical field of aviation equipment. The water jet air extractor comprises: a housing; the first diffusion body and the second diffusion body are arranged in the shell, the first diffusion body and the second diffusion body are arranged oppositely, and a diffusion channel is formed by the distance between the first diffusion body and the second diffusion body; the first adjusting mechanism is arranged on the first diffusion body and the second diffusion body and used for adjusting the size of the diffusion channel; the first diffusion body is provided with a guide cylinder, a first injection body is arranged in the guide cylinder in a sliding mode, the second diffusion body is provided with a guide ring, a second injection body is arranged in the guide ring in a sliding mode, the first injection body and the second injection body are arranged oppositely, and a jet flow channel is formed between the first injection body and the second injection body; the second adjusting mechanism is arranged on the first jet body and the second jet body and used for adjusting the size of the jet flow channel; the diffusion channel is communicated with the jet flow channel, and water enters the diffusion channel after being sprayed out of the jet flow channel. The invention has compact structure and easy adjustment, is convenient for adjusting the injection area ratio and is easy to process and manufacture.

Description

Water jet air extractor

Technical Field

The invention relates to a water jet air exhaust device, and belongs to the technical field of aviation equipment.

Background

The water jet air ejector is a fluid machine with high-pressure working water flow and low-pressure jet gas mixed and pressurized, and has multiple functions of vacuumizing, condensing, exhausting and the like. The water jet air ejector with different structures is widely applied in the fields of aerospace, military national defense, national industry and the like. The water jet air extractor which takes high-pressure water as a medium has the advantages of simple structure, small volume, convenient adjustment and the like, and has extremely wide application; the device is particularly used for vacuum and evaporation systems, can perform processes such as vacuum pumping, vacuum evaporation, vacuum filtration, vacuum crystallization, drying, deodorization and the like, is equipment required by aerospace, military national defense and power plants, and is also applied to sugar manufacturing, pharmacy, chemical industry, food, salt manufacturing, monosodium glutamate, milk, fermentation and some light industries.

There are three basic types of water jets available: the single-nozzle single-diffuser pipe, the multi-nozzle single-diffuser pipe and the multi-nozzle multi-diffuser pipe are arranged in the pipeline; first, when the pumping volume is large, the caliber of the water nozzle needs to be large, the water jet is coarse, so that the mass transfer of air and water is insufficient, and the water jet flow can not be fully utilized. The second type of water jet is thin in single-strand water jet, but requires that a plurality of jets must be focused on the throat part of the diffuser pipe, so that the jets collide with each other, the kinetic energy of the water jet is greatly lost, and the processing difficulty of the water jet is also high. The third category, multi-diffuser water jets, which are, in fact, standard water jets in parallel; and the injectors with various specifications can be combined. The water jet is thin, the mass transfer area of the water-gas two-phase flow is increased, and the water chamber has better pressure stabilizing performance, so that better air extraction efficiency and high ultimate vacuum degree are obtained. The device can be applied to gas compression, gas-water mixing and liquid mixing, and enables vacuum evaporation, condensation and vacuum degassing to be possible. However, such ejector nozzles are complex in layout and the effect of the suction chamber on the nozzle jet is still present. The connection of multiple diffusion pipes and tail pipes has complicated structural design problems and high design and manufacturing requirements.

Therefore, the structure form of the existing water jet air ejector is fixed and single, the structure is fixed and cannot be adjusted, and due to the injection mixing and the flow field in the diffusion pipeline and the complexity, some unknown phenomena can interact and interfere with each other if the ejector is not designed properly. For example, the area ratio of the diffuser passage area to the jet passage area needs to be changed according to the change of the flow rate of the jet fluid, and if the parameter cannot be adjusted, the structure of the ejector needs to be redesigned, which is troublesome to produce and manufacture.

Disclosure of Invention

Therefore, the technical problem to be solved by the embodiment of the invention is to overcome the defects of unreasonable structural design of the diffusion channel and the jet flow channel and low efficiency of the air extractor in the prior art, thereby providing the water jet air extraction device which has reasonable structural design and can adjust the diffusion channel and the jet flow channel.

The above object of the present invention is achieved by the following technical solutions:

a water jet air exhaust device comprises a shell; the first diffusion body and the second diffusion body are arranged in the shell, the first diffusion body and the second diffusion body are arranged oppositely, and a diffusion channel is formed by the distance between the first diffusion body and the second diffusion body; the first adjusting mechanism is arranged on the first diffusion body and the second diffusion body and used for adjusting the size of the diffusion channel; the first diffusion body is provided with a guide cylinder, a first injection body is arranged in the guide cylinder in a sliding mode, the second diffusion body is provided with a guide ring, a second injection body is arranged in the guide ring in a sliding mode, the first injection body and the second injection body are arranged oppositely, and a jet flow channel is formed between the first injection body and the second injection body; the second adjusting mechanism is arranged on the first jet body and the second jet body and is used for adjusting the size of the jet flow channel; the diffusion channel is communicated with the jet flow channel, and water enters the diffusion channel after being sprayed out of the jet flow channel.

Optionally, the first diffuser is a disc-shaped body, a first conical section is formed by outwardly protruding the bottom surface of the disc-shaped body at the central portion along the axis, a corner is formed by the side wall surface of the first conical section and the bottom surface of the disc-shaped body, a section extends from the bottom surface of the disc-shaped body at the corner towards the central direction of the disc-shaped body, a cylindrical guide cylinder is formed by inwardly protruding the bottom surface of the inner side of the first conical section towards the inside of the disc-shaped body along the axis, and a first vent hole is formed in the side wall surface of the first conical section; the second diffuser is a disc-shaped body, a second conical section is formed by inwards protruding the bottom surface of the disc-shaped body at the central part along the axis, the side wall surface of the second conical section and the bottom surface of the disc-shaped body form a corner, a section of the bottom surface of the disc-shaped body extends towards the central direction of the disc-shaped body at the corner, a guide ring is arranged at the bottom surface of the second conical section, the guide ring axially penetrates through the bottom surface of the second conical section, and a second vent hole is formed in the side wall surface of the second conical section; the bottom surfaces of the first diffuser and the second diffuser are arranged in parallel.

Alternatively, the first jet body has a cylindrical shape having a trumpet-shaped opening at one end; the second spraying body is in a cylindrical shape with openings at two ends, one opening is in a horn shape, an annular rib plate is arranged in the cylindrical shape of the second spraying body, and the annular outer side wall of the annular rib plate is arranged on the cylindrical inner side wall; wherein the horn-shaped open ends of the first jet body and the second jet body are arranged oppositely.

Optionally, the edges of the disc-shaped bodies of the first diffuser and the second diffuser are symmetrically provided with axially penetrating threaded through holes, and the rotation direction of the threaded through holes of the first diffuser is opposite to that of the threaded through holes of the second diffuser; the first adjusting mechanism comprises a first adjusting screw, and the first adjusting screw sequentially penetrates through the threaded through hole of the first diffusion body and the threaded through hole of the second diffusion body and is in threaded connection with the first diffusion body and the second diffusion body.

Optionally, a threaded through hole is formed in the bottom of the first diffuser guide cylinder, a threaded through hole is formed in the cylindrical bottom of the first injection body, and a threaded through hole in the opposite direction to the threaded through hole in the first injection body is formed in the center of the annular rib plate of the second injection body; the second adjusting mechanism comprises a second adjusting screw and a sealing cover, and the second adjusting screw penetrates through a threaded through hole at the bottom of the first diffuser guide cylinder and the sealing cover to be in sealing connection with the first diffuser; and the second adjusting screw penetrates through the threaded through hole of the first spray nozzle and the threaded through hole of the second spray body and is in threaded connection with the first spray nozzle and the second spray nozzle.

Optionally, the first adjusting mechanism includes a first guide gland, the second adjusting mechanism includes a second guide gland, and the first adjusting screw sequentially passes through the housing and the first guide gland and is fixed on the housing through the first guide gland; the second adjusting screw sequentially penetrates through the shell and the second guide gland and is fixed on the shell through the second guide gland.

Optionally, the shell comprises an outer cylinder and a positioning plate, wherein flanges are arranged at two ends of the outer cylinder, and the positioning plate is fixedly connected with the outer cylinder at the flanges; the first adjusting screw and the second adjusting screw are respectively fixed on the positioning plate through the guide gland.

Optionally, the injection device further comprises a first injection pipe and a second injection pipe, wherein one end of the first injection pipe is fixed on the first conical section and is communicated with the inner cavity of the first conical section through the first vent hole; one end of the second injection pipe is fixed on the second conical section and is communicated with the inner cavity of the second conical section through the second vent hole.

Optionally, the sealing cover comprises a threaded nut seat and a sealing sleeve nested in the nut seat, the nut seat is mounted on the first diffuser, and the second adjusting screw penetrates through the nut seat and is compressed by the sealing sleeve, so that high-pressure working water is sealed.

Optionally, the device further comprises an adapter, wherein one end of the adapter is connected with the second jet body, and the other end of the adapter is connected with a working pipeline.

Optionally, the first adjusting screw includes a square column portion and a cylindrical portion with threads, the square column portion is fixedly connected with the positioning plate, and the cylindrical portion passes through the threaded through holes of the first diffuser and the second diffuser and is in threaded connection with the first diffuser and the second diffuser.

Optionally, the area of the diffusion channel is a flow area, the area of the injection channel is an injection area, the flow area/the injection area is an adjustment area ratio epsilon, and epsilon ranges: epsilon is more than or equal to 2 and less than or equal to 4.

The technical scheme of the embodiment of the invention has the following advantages:

1. the water jet exhaust device provided by the embodiment of the invention is provided with a first diffusion body and a second diffusion body, wherein a first jet body and a second jet body are respectively arranged in the first diffusion body and the second diffusion body in a sliding manner, and a first adjusting mechanism adjusts the size of a diffusion channel by adjusting the distance between the first diffusion body and the second diffusion body; the second adjusting mechanism adjusts the size of the jet flow channel by adjusting the distance between the first jet body and the second jet body; thereby the water injection air extractor adapts to the variation of the injection flow and the pressure of the working water, and the working efficiency of the air extractor is improved.

2. According to the water jet air exhaust device provided by the embodiment of the invention, the first diffusion body and the second diffusion body are both disc-shaped in overall shape, the bottom surfaces of the two disc-shaped bodies are arranged in parallel, and a plane diffusion channel is formed by the distance between the two bottom surfaces, so that the processing is easy, and the diffusion is uniform and stable.

3. According to the water jet air exhaust device provided by the embodiment of the invention, the first jet body and the second jet body are provided with the horn-shaped openings, so that higher speed of water at the outlet is facilitated, and the jet effect is optimized; further, the second injection body is internally provided with the annular rib plate, so that the structure can reduce flow resistance and interference, and plays roles of supporting and increasing strength on the internal structure of the second injection body.

4. According to the water jet air exhaust device provided by the embodiment of the invention, the screwing directions of the threaded through holes of the first diffusion body and the second diffusion body are opposite, and when the water jet air exhaust device is connected with the first adjusting screw, the distance between the first diffusion body and the second diffusion body is favorably adjusted; the screw thread through holes of the first spray body and the second spray body are opposite in rotating direction, and when the first spray body is connected with the second adjusting screw, the distance between the first spray body and the second spray body can be adjusted; the structure is simple, the space is saved, the operation is convenient, and the realization is easy.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view showing a concrete example of the entirety of a water jet gas suction apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional front view of a particular example of a first diffuser in an embodiment of the present disclosure;

FIG. 3 is a schematic top view of a particular example of a first diffuser in an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional front view of a particular example of a second diffuser in an embodiment of the present disclosure;

FIG. 5 is a schematic top view of a specific example of a second diffuser in an embodiment of the present invention;

FIG. 6 is a schematic sectional front view showing a structure of a specific example of the first jet body in the embodiment of the invention;

FIG. 7 is a schematic top view showing a specific example of the first jet body in the embodiment of the invention;

FIG. 8 is a schematic sectional front view showing a structure of a specific example of the second jet body in the embodiment of the invention;

FIG. 9 is a schematic top view showing a specific example of the second jet body in the embodiment of the invention;

FIG. 10 is a front sectional view schematically showing a specific example of the outer tub in the embodiment of the present invention;

FIG. 11 is a schematic top view showing a specific example of the outer tub in the embodiment of the present invention;

FIG. 12 is a front cross-sectional structural view of a specific example of a positioning cover in an embodiment of the invention;

FIG. 13 is a schematic top view of a specific example of a positioning cover in an embodiment of the invention;

FIG. 14 is a schematic structural view showing a specific example of a sealing cover in the embodiment of the present invention;

fig. 15 is a front sectional structural view of a specific example of an adapter cartridge in an embodiment of the invention;

fig. 16 is a schematic top view of a specific example of an adapter cartridge in an embodiment of the invention;

fig. 17 is a schematic structural view of a specific example of the first adjustment screw in the embodiment of the invention;

fig. 18 is a schematic top view showing a specific example of the first adjusting screw according to the embodiment of the present invention;

reference numerals:

1-outer cylinder, 2-second diffuser, 21-second conical section, 22-guide ring, 23-second vent hole, 3-first diffuser, 31-first conical section, 32-guide cylinder, 33-first vent hole, 4-first adjusting screw, 41-square column part, 42-cylindrical part, 5-positioning plate, 6-first guide gland, 7-first injection pipe, 71-second injection pipe, 8-sealing cover, 81-nut seat, 82-sealing cover, 9-second adjusting screw, 10-second guide gland, 11-first injection body, 12-second injection body, 121-annular rib plate and 13-adapter cylinder.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises" and/or "comprising," when used in this specification, are intended to specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The term "and/or" includes any and all combinations of one or more of the associated listed items. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be connected through the inside of the two elements, or may be connected wirelessly or through a wire. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Examples

The present embodiment provides a water jet gas-extracting apparatus, as shown in fig. 1 to 9, comprising: a housing; the first diffuser 3 and the second diffuser 2 are arranged in the shell, the first diffuser 3 and the second diffuser 2 are arranged oppositely, and a diffusion channel is formed by the distance between the first diffuser 3 and the second diffuser 2; the first adjusting mechanism is arranged on the first diffusion body 3 and the second diffusion body 2 and is used for adjusting the size of the diffusion channel; the first diffuser 3 is provided with a guide cylinder 32, the first spray body 11 is arranged in the guide cylinder 32 in a sliding manner, the second diffuser 2 is provided with a guide ring 22, the second spray body 12 is arranged in the guide ring 22 in a sliding manner, the first spray body 11 and the second spray body 12 are arranged oppositely, and a jet flow channel is formed between the first spray body 11 and the second spray body 12; the second adjusting mechanism is arranged on the first jet body 11 and the second jet body 12 and is used for adjusting the size of a jet flow channel; the diffusion channel is communicated with the jet flow channel, and water enters the diffusion channel after being sprayed out of the jet flow channel.

In the embodiment of the present invention, as shown in fig. 1, the first diffuser 3 and the second diffuser 2 are installed in a housing, and the housing is mainly used for carrying the first diffuser 3 and the second diffuser 2 and the first jetting body 11 and the second jetting body 12 arranged thereon. The first diffuser 3 and the second diffuser 2 are arranged oppositely in the axial direction, a diffusion channel is formed by the distance between the first diffuser 3 and the second diffuser 2, and the first adjusting mechanism is arranged on the first diffuser 3 and the second diffuser 2 and used for adjusting the distance between the first diffuser 3 and the second diffuser 2 so as to achieve the purpose of adjusting the size of the diffusion channel. Further, the first injection body 11 is installed in the guide cylinder 32 of the first diffuser 3, and the second injection body 12 is installed in the guide ring 22 of the second diffuser 2, it should be noted that the wall surfaces of the guide cylinder 32 and the guide ring 22 are smooth wall surfaces, and the wall surfaces of the first injection body 11 and the second injection body 12 are also smooth wall surfaces, and the first injection body 11 and the second injection body 12 can axially slide along the guide cylinder 32 and the guide ring 22, and the same two are oppositely arranged in the axial direction, and respectively axially slide along the guide cylinder 32 and the guide ring 22 under the action of the second adjusting mechanism, so as to adjust the distance between the two, thereby achieving the purpose of adjusting the size of the jet flow channel. The first adjusting mechanism and the second adjusting mechanism respectively adjust the distance between the two diffusion bodies and the two spraying bodies in the axial direction, and the structural design ensures the consistency of the adjusting structure during adjustment and is more convenient to operate. The size of the diffusion channel is adjusted through the first adjusting mechanism, and the size of the jet flow channel is adjusted through the second adjusting mechanism, so that the water injection air exhaust device is adaptive to the variation of the jet flow and the pressure of the working water, and the working efficiency of the air exhaust device is improved.

Alternatively, as shown in fig. 2, the first diffuser 3 is a disk-shaped body, the bottom surface of the disk-shaped body is formed with a first conical section 31 protruding outwards along the axis at the central part, the side wall surface of the first conical section 31 forms a corner with the bottom surface of the disk-shaped body, and the bottom surface of the disk-shaped body extends out a section towards the central direction of the disk-shaped body at the corner, the bottom surface of the inner side of the first conical section 31 protrudes towards the inside of the disk-shaped body along the axis to form a cylindrical guide cylinder 32, and the side wall surface of the first conical section 31 is provided with a first vent hole 33;

as shown in fig. 4, the second diffuser 2 is a disk-shaped body, a second conical section 21 is formed by the bottom surface of the disk-shaped body protruding inwards along the axis at the central part, the side wall surface of the second conical section 21 and the bottom surface of the disk-shaped body form a corner, a section of the bottom surface of the disk-shaped body extends out towards the central direction of the disk-shaped body at the corner, a guide ring 22 is arranged at the bottom surface of the second conical section 21, the guide ring 22 axially penetrates through the bottom surface of the second conical section 21, and a second vent hole 23 is arranged at the side wall surface of the second conical section 21; the first diffuser 3 and the second diffuser 2 are arranged in parallel on the bottom surface.

In the embodiment of the present invention, it should be noted that all corners of the wall surface of the diffuser are smoothly transited and have a smooth surface, so as to ensure the smoothness of the diffuser process. The first diffuser 3 and the second diffuser 2 are both disc-shaped in overall shape, as shown in fig. 1, the bottom surfaces of the two disc-shaped bodies are arranged in parallel, and the distance between the two bottom surfaces forms a plane diffuser channel, so that the length size of the air extractor can be effectively reduced, and the system is compact; furthermore, as shown in fig. 2-5, the first diffuser 3 and the second diffuser 2 both have a conical section protruding from the bottom of the disk-shaped body, and the protruding direction of the conical section relative to the disk-shaped body is opposite, such a structural design ensures that the bottom surfaces of the two disk-shaped diffusers are parallel, and the mounting spaces are designed for the two injection bodies while the diffuser channels are parallel, so that on one hand, the processing is easy, on the other hand, the pressure loss is small, and the diffuser process is uniform and stable.

Further, as shown in fig. 3 and 5, the edges of the disk-shaped bodies of the first diffuser 3 and the second diffuser 2 are uniformly notched in the axial direction, so that the weight of the diffusers can be reduced.

Alternatively, as shown in fig. 6 to 9, the first jet body 11 has a cylindrical shape having a trumpet-shaped opening at one end; the second ejection body 12 is cylindrical with openings at two ends, one opening is horn-shaped, an annular rib plate 121 is arranged in the second ejection body 12, and the annular outer side wall of the annular rib plate 121 is arranged on the cylindrical inner side wall; wherein the trumpet-shaped open ends of the first jet body 11 and the second jet body 12 are arranged oppositely.

In the embodiment of the present invention, as shown in fig. 6, the inner side wall surface of the first ejection body 11 and the opening end surface are in arc transition to form a smooth corner, and the trumpet-shaped opening end surface includes a flat surface portion and an inclined surface portion extending along the opening outer edge direction. As shown in fig. 8 to 9, the inner side wall surface of the second ejection body 12 and the opening end surface are in arc transition to form a smooth corner, the trumpet-shaped opening end surface includes a plane portion and a slope portion extending along the direction outside the opening, specifically, the second ejection body 12 includes a first cylinder shape and a second cylinder shape, the diameter of the first cylinder shape is smaller than that of the second cylinder shape, the first cylinder shape and the second cylinder shape are in transition through the slope, the first cylinder shape is close to the trumpet-shaped opening, the annular rib plate 121 is arranged in the second cylinder shape, the annular rib plate 121 is integrally formed and is in a diamond shape, on one hand, the annular rib plate plays a role in supporting and increasing strength, and on the other hand, the flow resistance and the interference can be reduced. As shown in FIG. 1, the horn-shaped end surface of the first spray body (11) and the horn-shaped end surface of the second spray body (12) are arranged oppositely, so that high speed of water at the outlet is facilitated.

Alternatively, as shown in fig. 1 to 5, the disc-shaped body edges of the first diffuser 3 and the second diffuser 2 are symmetrically provided with axially penetrating threaded through holes, and the rotation direction of the threaded through holes of the first diffuser 3 is opposite to that of the threaded through holes of the second diffuser 2. The first adjusting mechanism comprises a first adjusting screw 4, and the first adjusting screw 4 sequentially penetrates through the threaded through hole of the first diffusion body 3 and the threaded through hole of the second diffusion body 2 and is in threaded connection with the first diffusion body and the second diffusion body.

In the embodiment of the invention, as shown in fig. 1-3, the threaded through holes of the first diffuser 3 are symmetrically arranged into two, and the direction of rotation of the threaded through hole of the first diffuser 3 is opposite to the direction of rotation of the threaded through hole of the second diffuser 2, for example, when the threaded through hole of the first diffuser 3 is left-handed, the threaded through hole of the second diffuser 2 is right-handed, thus, on the one hand, loosening can be effectively prevented, and on the other hand, when the first adjusting screw 4 is screwed to adjust the distance between the two diffusers, the cooperation of the threaded connections is such that the rotational movement of the first adjustment screw 4 is converted into a movement of the two diffusers in axial direction, and the moving directions of the two are opposite in the axial direction, for example, if the first diffuser 3 and the second diffuser 2 are twisted clockwise, the distance between the two is increased, and if the diffuser is twisted counterclockwise, the distance between the two is decreased, this makes it easier and easier to use the first adjustment screw 4 for adjusting the distance between the two diffusers.

Alternatively, as shown in fig. 1 to 9, the bottom of the guide cylinder 32 of the first diffuser 3 is provided with a threaded through hole, the cylindrical bottom of the first jet body 11 is provided with a threaded through hole, and the center of the annular rib 121 of the second jet body 12 is provided with a threaded through hole opposite to the threaded through hole of the first jet body 11 in the direction of rotation; the second adjusting mechanism comprises a second adjusting screw 9 and a sealing cover 8, and the second adjusting screw 9 penetrates through a threaded through hole at the bottom of the guide cylinder 32 of the first diffuser 3 and the sealing cover 8 to be connected with the first diffuser 3 in a sealing manner; the second adjusting screw 9 passes through the threaded through-hole of the first jet body 11 and the threaded through-hole of the second jet body 12, and is threadedly coupled with both.

In the embodiment of the invention, as shown in fig. 1, the second adjusting screw 9 is connected with the first diffuser 3 in a sealing manner by means of a sealing cover 8, on one hand, the second adjusting screw is used for bearing the weight of the first injection body 11 and the second injection body 12, and on the other hand, the sealing of high-pressure working water in the diffuser can be realized. Further, the first and

second jet bodies

11 and 12 have the structure design in which the screw rotation directions of the threaded through holes are opposite to each other, similar to the first and

second diffusers

3 and 2, and when the second adjustment screw 9 is screwed to adjust the distance between the first and

second jet bodies

11 and 12, the first and

second jet bodies

11 and 12 move in opposite directions in the axial direction, so that the second adjustment screw 9 is used to adjust the distance between the two diffuser bodies, which is easier and easier to handle.

Optionally, the first adjusting mechanism includes a first guide gland 6, the second adjusting mechanism includes a second guide gland 10, the first adjusting screw 4 sequentially penetrates through the housing and the first guide gland 6, and the first adjusting screw 4 is fixed on the housing through the first guide gland 6; the second adjusting screw 9 sequentially penetrates through the shell and the second guide gland 10, and the second adjusting screw 9 is fixed on the shell through the second guide gland 10.

In the embodiment of the invention, the guide gland 6 is a flange with steps, and passes through the middle hole to fix the adjusting screw on the shell. As shown in fig. 1, the first and second adjusting screws 4 and 9 are fixed to the housing by the first and second guide glands 6 and 10, respectively, and further mount the first and

second diffusers

3 and 2 and the first and

second injection bodies

11 and 12 on the housing for carrying and accommodating the first and

second diffusers

3 and 2 and the first and

second injection bodies

11 and 12.

Optionally, as shown in fig. 10 to 13, the housing includes an outer cylinder 1 and a positioning plate 5, flanges are provided at two ends of the outer cylinder 1, and the positioning plate 5 is fixedly connected with the outer cylinder 1 at the flanges; in the embodiment of the invention, as shown in fig. 10, the outer cylinder 1 is a section of straight pipeline with smooth inner wall, as shown in fig. 12-13, the positioning plate 5 is a porous disc with a certain thickness, and the edges of the outer cylinder 1 and the positioning plate 5 are both provided with threaded holes which are fixedly connected through bolts. The first adjusting screw 4 and the second adjusting screw 9 are respectively fixed on the positioning plate 5 through guide pressing covers.

Optionally, the injection device further comprises a first injection pipe 7 and a second injection pipe 71, wherein one end of the first injection pipe 7 is fixed on the first conical section 31 and is communicated with the inner cavity of the first conical section 31 through a first vent hole 33; one end of the second injection pipe 71 is fixed on the second conical section 21 and is communicated with the inner cavity of the second conical section 21 through the second vent hole 23.

In the embodiment of the invention, the first injection pipe 7 and the second injection pipe 71 are mainly used for injecting air and steam to be injected into the diffuser to mix with the injection fluid, and extracting the mixed steam and gas under the action of the high-speed injection fluid.

Alternatively, as shown in fig. 14, the sealing cover 8 comprises a threaded nut seat 81 and a sealing sleeve 82 nested in the nut seat 81, the nut seat 81 is mounted on the first diffuser 3, and the second adjusting screw 9 passes through the nut seat 81 and is pressed against the sealing sleeve 82, so as to realize the sealing of the high-pressure working water. Such structural seal structure is more firm, and the effect is better.

Alternatively, as shown in fig. 15 to 16, the spray gun further comprises an adapter 13, one end of the adapter 13 is connected with the second spray body 12, and the other end is connected with the working pipeline.

In the embodiment of the invention, the inner diameter of the adapter cylinder 13 is 40mm and is made of stainless steel material. One end of the second jet body 12 is connected and the other end is a pipe flange for introducing a high-pressure working fluid. When the device is used, working fluid enters the first ejection body 11 and the second ejection body 12 through the adapter 13 and is ejected from the horn-shaped opening nozzles of the first ejection body 11 and the second ejection body 12, the working fluid is water, the high-pressure water jet sucks low-pressure gas ejected from the ejection pipe and mixes the low-pressure gas in the conical section of the diffuser, the mixed fluid enters the diffuser passage and slows down along the passage, the pressure gradually rises, and finally the mixed fluid is discharged out of the air extractor at a pressure slightly higher than the atmospheric pressure.

Alternatively, the first adjusting screw 4 comprises a square column part 41 and a cylindrical part 42 with screw thread, the square column part 41 is fixedly connected with the positioning plate 5, and the cylindrical part 42 passes through the threaded through holes of the first diffuser 3 and the second diffuser 2 to be in threaded connection with the first diffuser 3 and the second diffuser 2.

Optionally, the area of the diffuser channel is a flow area, the area of the injection channel is an injection area, the flow area/injection area is an adjustment area ratio ∈, the range ∈ being: epsilon is more than or equal to 2 and less than or equal to 4.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A water jet extraction system, comprising: a housing;

the first diffuser (3) and the second diffuser (2) are arranged in the shell, the first diffuser (3) and the second diffuser (2) are arranged oppositely, and a diffusion channel is formed by the distance between the first diffuser and the second diffuser; the first adjusting mechanism is arranged on the first diffusion body (3) and the second diffusion body (2) and is used for adjusting the size of the diffusion channel; the first diffuser (3) is provided with a guide cylinder (32), a first jet body (11) is arranged in the guide cylinder (32) in a sliding manner, the second diffuser (2) is provided with a guide ring (22), a second jet body (12) is arranged in the guide ring (22) in a sliding manner, the first jet body (11) and the second jet body (12) are arranged oppositely, and a jet flow channel is formed between the first jet body (11) and the second jet body (12); the second adjusting mechanism is arranged on the first jet body (11) and the second jet body and is used for adjusting the size of the jet flow channel; the diffusion channel is communicated with the jet flow channel, and water enters the diffusion channel after being sprayed out of the jet flow channel.

2. The water jet air extraction device according to claim 1, wherein the first diffuser (3) is a disk-shaped body, a first tapered section (31) is formed by protruding the bottom surface of the disk-shaped body outwards along the axis at the central part, the side wall surface of the first tapered section (31) forms a corner with the bottom surface of the disk-shaped body, the bottom surface of the disk-shaped body extends out to the central direction of the disk-shaped body at the corner, a cylindrical guide cylinder (32) is formed by protruding the inner bottom surface of the first tapered section (31) towards the inside of the disk-shaped body along the axis, and a first vent hole (33) is formed on the side wall surface of the first tapered section (31);

the second diffuser (2) is a disc-shaped body, a second conical section (21) is formed by inwards protruding the bottom surface of the disc-shaped body at the central part along the axis, the side wall surface of the second conical section (21) and the bottom surface of the disc-shaped body form a corner, a section of the bottom surface of the disc-shaped body extends out from the corner towards the central direction of the disc-shaped body, a guide ring (22) is arranged on the bottom surface of the second conical section (21), the guide ring (22) axially penetrates through the bottom surface of the second conical section (21), and a second vent hole (23) is formed in the side wall surface of the second conical section (21);

the bottom surfaces of the first diffuser (3) and the second diffuser (2) are arranged in parallel.

3. The water jet air-extracting apparatus according to claim 2, wherein the first jet body (11) has a cylindrical shape having a horn-shaped opening at one end; the second spray body (12) is cylindrical, two ends of the second spray body are provided with openings, one opening is trumpet-shaped, an annular rib plate (121) is arranged in the second spray body (12), and the annular outer side wall of the annular rib plate (121) is arranged on the cylindrical inner side wall; wherein the horn-shaped open ends of the first jet body (11) and the second jet body (12) are arranged oppositely.

4. The water jet extraction device according to any one of claims 1 to 3, characterized in that the edges of the disks of the first diffuser (3) and the second diffuser (2) are symmetrically provided with threaded through holes passing axially therethrough, and the rotation direction of the threaded through holes of the first diffuser (3) is opposite to that of the threaded through holes of the second diffuser (2);

the first adjusting mechanism comprises a first adjusting screw (4), and the first adjusting screw (4) sequentially penetrates through the threaded through hole of the first diffusion body (3) and the threaded through hole of the second diffusion body (2) and is in threaded connection with the first diffusion body and the second diffusion body.

5. The water jet air extraction device according to the claim 4, characterized in that the bottom of the guide cylinder (32) of the first diffuser (3) is provided with a threaded through hole, the cylindrical bottom of the first jet body (11) is provided with a threaded through hole, and the center of the annular rib (121) of the second jet body (12) is provided with a threaded through hole with the opposite rotation direction of the threads of the cylindrical threaded through hole of the first jet body (11);

the second adjusting mechanism comprises a second adjusting screw (9) and a sealing cover (8), and the second adjusting screw (9) penetrates through a threaded through hole at the bottom of the guide cylinder (32) of the first diffuser (3) and the sealing cover (8) to be in sealing connection with the first diffuser (3);

the second adjusting screw (9) penetrates through the threaded through hole of the first spray body (11) and the threaded through hole of the second spray body (12) and is in threaded connection with the first spray body and the second spray body.

6. The water jet extraction device according to claim 5, wherein the first adjustment mechanism includes a first guide gland (6), the second adjustment mechanism includes a second guide gland (10), the first adjustment screw (4) passes through the housing and the first guide gland (6) in sequence, and the first adjustment screw (4) is fixed on the housing by the first guide gland (6); the second adjusting screw (9) sequentially penetrates through the shell and the second guide gland (10), and the second adjusting screw (9) is fixed on the shell through the second guide gland (10).

7. The water jet air exhaust device according to claim 6, wherein the housing comprises an outer cylinder (1) and a positioning plate (5), flanges are arranged at two ends of the outer cylinder (1), and the positioning plate (5) is fixedly connected with the outer cylinder (1) at the flanges;

the first adjusting screw (4) and the second adjusting screw (9) are respectively fixed on the positioning plate (5) through the guide gland.

8. The water jet air extraction device according to claim 2, further comprising a first jet pipe (7) and a second jet pipe (71), wherein one end of the first jet pipe (7) is fixed on the first conical section (31) and is communicated with the inner cavity of the first conical section (31) through the first vent hole (33); one end of the second injection pipe (71) is fixed on the second conical section (21) and is communicated with the inner cavity of the second conical section (21) through the second vent hole (23).

9. The water jet extraction device according to claim 7, characterized in that the sealing cover (8) comprises a threaded nut seat (81) and a sealing sleeve (82) nested in the nut seat (81), the nut seat (81) is mounted on the first diffuser (3), and the second adjusting screw (9) passes through the nut seat (81) and is pressed against the sealing sleeve (82) to realize the sealing of high-pressure working water.

10. The water jet air extraction device according to claim 1, further comprising an adapter (13), wherein one end of the adapter (13) is connected to the second jet body (12), and the other end is connected to a working pipeline.