CN114042389A - Venturi mixing device with throat part with variable guide angle - Google Patents

Abstract

The invention discloses a Venturi mixing device with a throat part variable guiding angle, which comprises a Venturi tube front section, a Venturi tube rear section, a Venturi throat part, a Venturi tube front section gasket, a Venturi tube rear section gasket, a bolt gasket, a front section thread blind hole, a rear section thread blind hole, a through hole, an injection hole, a front section gasket through hole and a rear section gasket through hole. Venturi anterior segment and venturi back end insert venturi throat with venturi anterior segment gasket and venturi back end gasket cooperation back respectively to form whole mixing arrangement after fixed by bolted connection. The different venturi throats are changed to change the angle of incidence and thus the mixing effect of the device. The invention is suitable for various working conditions, saves labor and time cost, can realize the optimal mixing effect, and is more convenient to clean all elements in the pipe.

Description

Venturi mixing device with throat part with variable guide angle

Technical Field

The invention relates to the technical field of venturis, in particular to a venturi mixing device with a throat part with a variable guide angle.

Background

The Venturi has a plurality of related fields, including military, energy, agriculture, materials, chemical engineering, pharmacy and other fields, can generate a local low-pressure area, and has high utilization value. The venturi mixer realizes the mixing of two streams of fluid by the principle that when the injection fluid flows through the throat part of the venturi tube, the flow cross section is sharply reduced, the water flow is accelerated and reduced in pressure to form a stable low-pressure area, and the injected fluid is injected into the venturi tube through the injection hole of the throat part under the action of pressure difference.

The throat part of the Venturi mixing device is provided with an injection hole, and the angle between the injection hole and the throat part of the Venturi mixing device is one of important factors influencing the performance of the Venturi mixing device. The optimum mixing effect of the venturi mixing device is that the ejection liquid is tangent to the lower wall surface of the throat part on the other side of the ejection hole, so that a certain angle is required between the venturi ejection hole and the venturi throat part. The venturi mixing device often relates to multiple velocity of flow operating mode at the actual work in-process, but present conventional venturi mixing device can't change the angle of drawing the jet hole in venturi, consequently will satisfy different angles and draw and penetrate the requirement, must process a plurality of mixing arrangement, and manpower and time cost are higher. Therefore, a venturi mixing device with variable throat guiding angle becomes one of the technical keys in the field.

Disclosure of Invention

The invention mainly solves the technical problem of providing the Venturi mixing device with the throat part variable injection angle, so that the Venturi mixing device is suitable for various working conditions with variable injection angles.

In order to solve the technical problems, the invention adopts a technical scheme that:

a venturi mixing device with a throat variable guide angle comprises a venturi front section 1, a venturi rear section 2, a venturi throat group 3, a venturi front section gasket 4, a venturi rear section gasket 5, a bolt a6, a bolt b7, a bolt c8, a bolt d9, a bolt e10, a bolt f15, a bolt g16, a bolt h17, a bolt gasket a18, a bolt gasket b19, a bolt gasket c20, a bolt gasket d25, a bolt gasket e26, a bolt gasket f27, a bolt gasket g28 and a bolt gasket h 29.

The front section 1 of the Venturi tube is a Venturi tapered section, the small end of the Venturi tapered section is additionally provided with a circular wall surface with the inner diameter of 180mm, the outer diameter of 230mm and the length of 40mm, the inner diameter of the small end of the Venturi tapered section is 180mm, the outer diameter of the small end of the Venturi tapered section is 230mm, the inner diameter of the large end of the Venturi tapered section is 500mm, and the outer diameter of the large end of the Venturi tapered section is 550 mm; the total length of the front section 1 of the Venturi tube is 340 mm; the front section threaded blind hole a11, the front section threaded blind hole b12, the front section threaded blind hole c13 and the front section threaded blind hole d14 of the front section 1 of the venturi tube are uniformly distributed on the circular ring-shaped wall surface of the front section 1 of the venturi tube at intervals of 90 degrees in sequence; the distance between the central axis of the front-section threaded blind hole a11, the front-section threaded blind hole b12, the front-section threaded blind hole c13 and the front-section threaded blind hole d14 and the outer end face of the circular ring-shaped wall face is 20 mm; the thread sizes of the front section threaded blind hole a11, the front section threaded blind hole b12, the front section threaded blind hole c13 and the front section threaded blind hole d14 are all M16, and the depths are all 15 mm.

The rear section 2 of the Venturi tube is a Venturi gradually-expanding section, wherein a circular wall surface with the inner diameter of 180mm, the outer diameter of 230mm and the length of 40mm is additionally arranged at the small end of the Venturi gradually-expanding section, the inner diameter of the small end of the Venturi gradually-expanding section is 180mm, the outer diameter of the small end of the Venturi gradually-expanding section is 230mm, the inner diameter of the large end of the Venturi gradually-expanding section is 600mm, and the outer diameter of the large end of the Venturi gradually-expanding section is 650 mm; the total length of the rear section 2 of the Venturi tube is 640 mm; the rear-section threaded blind hole a21, the rear-section threaded blind hole b22, the rear-section threaded blind hole c23 and the rear-section threaded blind hole d24 of the rear section 2 of the venturi tube are uniformly distributed on the circular wall surface of the rear section 2 of the venturi tube at intervals of 90 degrees in sequence; the distance between the central axis of the rear-section threaded blind hole a21, the rear-section threaded blind hole b22, the rear-section threaded blind hole c23 and the rear-section threaded blind hole d24 and the outer end face of the circular ring-shaped wall surface is 20 mm; the thread sizes of the rear-section threaded blind hole a21, the rear-section threaded blind hole b22, the rear-section threaded blind hole c23 and the rear-section threaded blind hole d24 are all M16, and the depths are all 15 mm.

The Venturi throat group 3 comprises a 60-degree injection angle Venturi throat 31, a 45-degree injection angle Venturi throat 32, a 30-degree injection angle Venturi throat 33, a 15-degree injection angle Venturi throat 34 and a 10-degree injection angle Venturi throat 35.

1. The 60-degree injection angle Venturi throat 31 is obtained by cutting annular materials with the inner diameter of 180mm, the outer diameter of 240mm and the depth of 40mm from two ends of a straight pipe section with the inner diameter of 300mm and the length of 550mm to form an annular wall surface with the inner diameter of 240mm, the outer diameter of 300mm and the length of 40 mm; an injection inlet pipe section with the inner diameter of 20mm, the outer diameter of 30mm and the height of 40mm is arranged on a bus of the outer wall surface of the 60-degree injection angle Venturi throat part 31 and is 80mm away from the end surface of one side, the bottom of the injection inlet pipe section is communicated with an injection hole with the inner diameter of 20mm and the central axis of 60 degrees with the central axis of the 60-degree injection angle Venturi throat part 31, and the injection hole and the injection inlet pipe section form a 60-degree injection hole 319 together; the through holes 1a311, the through holes 1b312, the through holes 1c313 and the through holes 1d314 are sequentially and uniformly distributed on the circular ring-shaped wall surface close to the 60-degree injection hole 319 at intervals of 90 degrees, and the distances between the central axes of the through holes 1a311, the through holes 1b312, the through holes 1c313 and the through holes 1d314 and the outer end surface of the circular ring-shaped wall surface are all 20 mm; the through hole 1e315, the through hole 1f316, the through hole 1g317 and the through hole 1h318 are uniformly distributed on the circular ring-shaped wall surface far away from the 60-degree injection hole 319 at intervals of 90 degrees in sequence, and the distances between the central axes of the through hole 1e315, the through hole 1f316, the through hole 1g317 and the through hole 1h318 and the outer end surface of the circular ring-shaped wall surface are all 20 mm; the diameters of through hole 1a311, through hole 1b312, through hole 1c313, through hole 1d314, through hole 1e315, through hole 1f316, through hole 1g317 and through hole 1h318 are all 18 mm; compared with the venturi throat 31 with the ejection angle of 60 degrees, the venturi throats 32, 33, 34 and 35 with the ejection angles of 45 degrees, 30 degrees and 10 degrees are completely the same except that the angles of the ejection holes: the ejection angle corresponding to the 45-degree ejection hole 329 on the 45-degree ejection angle Venturi throat 32 is 45 degrees; the 30-degree injection hole 339 on the 30-degree injection angle Venturi throat 33 corresponds to an injection angle of 30 degrees; the 15-degree injection hole 349 on the 15-degree injection angle venturi throat 34 corresponds to an injection angle of 15 degrees; the 10-degree injection hole 359 on the 10-degree injection angle venturi throat 35 has a corresponding injection angle of 10 degrees.

The Venturi tube front section gasket 4 is a circular rubber gasket with the inner diameter of 230mm, the outer diameter of 240mm and the width of 40 mm; the front section gasket through hole a41, the front section gasket through hole b42, the front section gasket through hole c43 and the front section gasket through hole d44 of the venturi tube front section gasket 4 are uniformly distributed on the annular venturi tube front section gasket 4 at intervals of 90 degrees in sequence, and the distances between the central axes of the front section gasket through hole a41, the front section gasket through hole b42, the front section gasket through hole c43 and the front section gasket through hole d44 and the end faces of the two sides of the venturi tube front section gasket 4 are all 20 mm; the diameters of front section shim through hole a41, front section shim through hole b42, front section shim through hole c43, and front section shim through hole d44 are all 20 mm.

The back gasket 5 of the Venturi tube is a circular rubber gasket with the inner diameter of 230mm, the outer diameter of 240mm and the width of 40 mm; the rear gasket through hole a51, the rear gasket through hole b52, the rear gasket through hole c53 and the rear gasket through hole d54 of the venturi tube rear gasket 5 are uniformly distributed on the annular venturi tube rear gasket 5 at intervals of 90 degrees in sequence, and the distances between the central axes of the rear gasket through hole a51, the rear gasket through hole b52, the rear gasket through hole c53 and the rear gasket through hole d54 and the end faces of the two sides of the venturi tube rear gasket 5 are all 20 mm; the diameters of the rear gasket through hole a51, the rear gasket through hole b52, the rear gasket through hole c53 and the rear gasket through hole d54 are all 20 mm.

And the bolt gasket a18, the bolt gasket b19, the bolt gasket c20, the bolt gasket d25, the bolt gasket e26, the bolt gasket f27, the bolt gasket g28 and the bolt gasket h29 are all made of rubber.

The thread sizes of the bolt a6, the bolt b7, the bolt c8, the bolt d9, the bolt e10, the bolt f15, the bolt g16 and the bolt h17 are all M16, the thread lengths are all 20mm, the bolt length is 45mm, and the total bolt length is 55 mm.

The invention has the beneficial effects that:

compared with the conventional Venturi injection mixing device, the Venturi mixing device with the variable injection angle at the throat part achieves the purpose of changing the injection angle by installing the Venturi throat parts with different injection angles, can replace a plurality of groups of injector workpieces, reduces the material consumption and shortens the service cycle; the Venturi throats with different injection angles have no interference on main flow fluid and injection fluid of the throats, and the integrity of an internal flow field of the mixing device is protected; the whole mixing device is convenient to disassemble and assemble, and the elements in the pipe can be cleaned and replaced.

Drawings

FIG. 1 is a first assembly view of a variable throat lead angle venturi mixing device according to the present invention;

FIG. 2 is a second assembly view of a variable throat lead angle venturi mixing device according to the present invention;

FIG. 3 is a third assembly view of a variable throat lead angle venturi mixing device according to the present invention;

FIG. 4 is a fourth assembly view of a variable throat lead angle venturi mixing device according to the present invention;

FIG. 5 is a three-dimensional view of a variable throat guide angle venturi mixing device of the present invention;

FIG. 6 is an assembled cross-sectional view of a 60 degree injection angle venturi throat of a variable throat injection angle venturi mixing device of the present invention;

FIG. 7 is an assembled cross-sectional view of a venturi throat with a 45 degree injection angle in a venturi mixing device with a variable injection angle at the throat of the present invention;

FIG. 8 is an assembled cross-sectional view of a venturi throat with a 30 degree injection angle in a venturi mixing device with a variable injection angle at the throat according to the present invention;

FIG. 9 is an assembled cross-sectional view of a venturi throat with a 15 degree injection angle in a venturi mixing device with a variable injection angle at the throat according to the present invention;

FIG. 10 is an assembled cross-sectional view of a 10 degree injection angle venturi throat of a variable throat injection angle venturi mixing device of the present invention;

FIG. 11 is a three dimensional view of the forward section of a venturi tube in a variable throat angle venturi mixing device of the present invention;

FIG. 12 is a cross-sectional view of the forward section of a venturi tube in a variable throat angle venturi mixing device of the present invention;

FIG. 13 is a three-dimensional view of the rear section of the venturi tube in a variable throat angle venturi mixing device of the present invention;

FIG. 14 is a cross-sectional view of the rear section of the venturi tube in a variable throat angle venturi mixing device of the present invention;

FIG. 15 is a three dimensional view of a venturi throat assembly in a variable throat pilot angle venturi mixing device in accordance with the present invention;

FIG. 16 is a three-dimensional view of a 60 degree injection angle venturi throat in a variable throat injection angle venturi mixing device of the present invention;

FIG. 17 is a cross-sectional view of a 60 degree injection angle venturi throat in a variable throat injection angle venturi mixing device of the present invention;

FIG. 18 is a three dimensional view of a 45 degree injection angle venturi throat in a variable throat injection angle venturi mixing device of the present invention;

FIG. 19 is a cross-sectional view of a 45 degree injection angle venturi throat in a variable throat injection angle venturi mixing device of the present invention;

FIG. 20 is a three dimensional view of a 30 degree injection angle venturi throat in a variable throat injection angle venturi mixing device of the present invention;

FIG. 21 is a cross-sectional view of a 30 degree injection angle venturi throat in a variable throat injection angle venturi mixing device of the present invention;

FIG. 22 is a three dimensional view of a 15 degree injection angle venturi throat in a variable throat injection angle venturi mixing device of the present invention;

FIG. 23 is a cross-sectional view of a 15 degree injection angle venturi throat in a variable throat injection angle venturi mixing device of the present invention;

FIG. 24 is a three dimensional view of a 10 degree injection angle venturi throat in a variable throat injection angle venturi mixing device of the present invention;

FIG. 25 is a cross-sectional view of a 10 degree injection angle venturi throat in a variable throat injection angle venturi mixing device of the present invention;

FIG. 26 is a three dimensional view of a gasket for the forward section of a venturi tube in a variable throat angle venturi mixing device of the present invention;

FIG. 27 is a three dimensional view of a shim at the rear of the venturi in a variable throat angle venturi mixing device of the present invention.

Detailed Description

The invention is further described in detail below with reference to the drawings and the detailed description so that the advantages and features of the invention can be more easily understood by those skilled in the art, and the scope of the invention is more clearly and clearly defined.

The invention relates to a throat-variable-guide-angle Venturi mixing device, which comprises a Venturi tube front section 1, a Venturi tube rear section 2, a Venturi throat group 3, a Venturi tube front section gasket 4, a Venturi tube rear section gasket 5, a bolt a6, a bolt b7, a bolt c8, a bolt d9, a bolt e10, a bolt f15, a bolt g16, a bolt h17, a bolt gasket a18, a bolt gasket b19, a bolt gasket c20, a bolt gasket d25, a bolt gasket e26, a bolt gasket f27, a bolt gasket g28 and a bolt gasket h 29; the front section 1 of the Venturi tube is provided with a front section threaded blind hole a11, a front section threaded blind hole b12, a front section threaded blind hole c13 and a front section threaded blind hole d 14; the rear section 2 of the Venturi tube is provided with a rear section threaded blind hole a21, a rear section threaded blind hole b22, a rear section threaded blind hole c23 and a rear section threaded blind hole d 24; the Venturi throat group 3 comprises a 60-degree injection angle Venturi throat 31, a 45-degree injection angle Venturi throat 32, a 30-degree injection angle Venturi throat 33, a 15-degree injection angle Venturi throat 34 and a 10-degree injection angle Venturi throat 35; the 60-degree injection angle Venturi throat 31 is provided with a through hole 1a311, a through hole 1b312, a through hole 1c313, a through hole 1d314, a through hole 1e315, a through hole 1f316, a through hole 1g317, a through hole 1h318 and a 60-degree injection hole 319; the venturi throat 32 with the ejection angle of 45 degrees comprises a through hole 2a321, a through hole 2b322, a through hole 2c323, a through hole 2d324, a through hole 2e325, a through hole 2f326, a through hole 2g327, a through hole 2h328 and an ejection hole 329 with an angle of 45 degrees; the venturi throat 33 with the 30-degree injection angle comprises a through hole 3a331, a through hole 3b332, a through hole 3c333, a through hole 3d334, a through hole 3e335, a through hole 3f336, a through hole 3g337, a through hole 3h338 and a 30-degree injection hole 339; the 15-degree injection angle venturi throat 34 comprises a through hole 4a341, a through hole 4b342, a through hole 4c343, a through hole 4d344, a through hole 4e345, a through hole 4f346, a through hole 4g347, a through hole 4h348 and a 15-degree injection hole 349; the 10-degree injection angle venturi throat 35 comprises a through hole 5a351, a through hole 5b352, a through hole 5c353, a through hole 5d354, a through hole 5e355, a through hole 5f356, a through hole 5g357, a through hole 5h358 and a 10-degree injection hole 359.

As a preferred embodiment of the present invention, as shown in fig. 1, the venturi tube front gasket 4 is inserted into the 60 ° injection angle venturi throat 31 along the arrow direction in the drawing, and the front gasket through hole a41 is aligned with the through hole 1a311, the front gasket through hole b42 is aligned with the through hole 1b312, the front gasket through hole c43 is aligned with the through hole 1c313, the front gasket through hole d44 is aligned with the through hole 1d314, then the venturi tube front gasket 1 is inserted into the venturi tube front gasket 4, the front threaded blind hole a11 is aligned with the front gasket through hole a41, the front threaded blind hole b12 is aligned with the front gasket through hole b42, the front threaded blind hole c13 is aligned with the front gasket through hole c43, and the front threaded blind hole d14 is aligned with the front gasket through hole d 44; as shown in fig. 2, bolt a6 is screwed into front-section threaded blind hole a11 through bolt gasket a18, through hole 1a311 and front-section gasket through hole a41 and is pre-tightened, bolt b7 is screwed into front-section threaded blind hole b12 through bolt gasket b19, through hole 1b312 and front-section gasket through hole b42 and is pre-tightened, bolt c8 is screwed into front-section threaded blind hole c13 through bolt gasket c20, through hole 1c313 and front-section gasket through hole c43 and is pre-tightened, bolt d9 is screwed into front-section threaded blind hole d14 through bolt gasket d25, through hole 1d314 and front-section gasket through hole d44 and is pre-tightened; as shown in fig. 3, the venturi tube rear gasket 5 is inserted into the 60 ° injection angle venturi throat 31 along the arrow direction in the drawing, and the rear gasket through hole a51 is aligned with the through hole 1e315, the rear gasket through hole b52 is aligned with the through hole 1f316, the rear gasket through hole c53 is aligned with the through hole 1g317, the rear gasket through hole d54 is aligned with the through hole 1h318, then the venturi tube rear gasket 5 is inserted, the rear threaded blind hole a21 is aligned with the rear gasket through hole a51, the rear threaded blind hole b22 is aligned with the rear gasket through hole b52, the rear threaded blind hole c23 is aligned with the rear gasket through hole c53, and the rear threaded blind hole d24 is aligned with the rear gasket through hole d 54; as shown in fig. 4, a bolt e10 is threaded into the rear-section threaded blind hole a21 through a bolt gasket e26, a through hole 1e315 and a rear-section gasket through hole a51 and is pre-tightened, a bolt f15 is threaded into the rear-section threaded blind hole b22 through a bolt gasket f27, a through hole 1f316 and a rear-section gasket through hole b52 and is pre-tightened, a bolt g16 is threaded into the rear-section threaded blind hole c23 through a bolt gasket g28, a through hole 1g317 and a rear-section gasket through hole c53 and is pre-tightened, and a bolt h17 is threaded into the rear-section threaded blind hole d24 through a bolt gasket h29, a through hole 1h318 and a rear-section gasket through hole d54 and is pre-tightened; as shown in fig. 5, all the bolts are tightened simultaneously, so that all the parts of the whole device are tightly matched under the condition of uniform stress, the 60-degree injection angle venturi throat 31 is connected with the front section 1 of the venturi tube and the rear section 2 of the venturi tube to form a complete venturi structure, and the 60-degree injection hole 319 is communicated with the whole venturi structure to form the whole 60-degree injection angle venturi mixing device; the cross-sectional view of the 60 degree injection angle venturi mixing device is shown in figure 6.

Similar to fig. 1, 2, 3, 4 and 5, the venturi mixing device with the 45-degree injection angle has the following assembly flow: inserting a venturi tube front section gasket 4 into a 45-degree injection angle venturi throat 32, aligning a front section gasket through hole a41 with a through hole 2a321, aligning a front section gasket through hole b42 with a through hole 2b322, aligning a front section gasket through hole c43 with a through hole 2c323, aligning a front section gasket through hole d44 with a through hole 2d324, then inserting a venturi tube front section 1 into the venturi tube front section gasket 4, aligning a front section threaded blind hole a11 with a front section gasket through hole a41, aligning a front section threaded blind hole b12 with a front section gasket through hole b42, aligning a front section threaded blind hole c13 with a front section gasket through hole c43, and aligning a front section threaded blind hole d14 with a front section gasket through hole d 44; bolt a6 is threaded into a front section threaded blind hole a11 through a bolt gasket a18, a through hole 2a321 and a front section gasket through hole a41 and is pre-tightened, bolt b7 is threaded into a front section threaded blind hole b12 through a bolt gasket b19, a through hole 2b322 and a front section gasket through hole b42 and is pre-tightened, bolt c8 is threaded into a front section threaded blind hole c13 through a bolt gasket c20, a through hole 2c323 and a front section gasket through hole c43 and is pre-tightened, and bolt d9 is threaded into a front section threaded blind hole d14 through a bolt gasket d25, a through hole 2d324 and a front section gasket through hole d44 and is pre-tightened; inserting a rear gasket 5 of the venturi tube into a 45-degree injection angle venturi throat 32, aligning a rear gasket through hole a51 with a through hole 2e325, aligning a rear gasket through hole b52 with a through hole 2f326, aligning a rear gasket through hole c53 with a through hole 2g327, aligning a rear gasket through hole d54 with a through hole 2h328, then inserting a rear gasket 2 of the venturi tube into the rear gasket 5 of the venturi tube, aligning a rear threaded blind hole a21 with a rear gasket through hole a51, aligning a rear threaded blind hole b22 with a rear gasket through hole b52, aligning a rear threaded blind hole c23 with a rear gasket through hole c53, and aligning a rear threaded blind hole d24 with a rear gasket through hole d 54; a bolt e10 is screwed into the rear-section threaded blind hole a21 through a bolt gasket e26, a through hole 2e325 and a rear-section gasket through hole a51 and is pre-tightened, a bolt f15 is screwed into the rear-section threaded blind hole b22 through a bolt gasket f27, a through hole 2f326 and a rear-section gasket through hole b52 and is pre-tightened, a bolt g16 is screwed into the rear-section threaded blind hole c23 through a bolt gasket g28, a through hole 2g327 and a rear-section gasket through hole c53 and is pre-tightened, and a bolt h17 is screwed into the rear-section threaded blind hole d24 through a bolt gasket h29, a through hole 2h328 and a rear-section gasket through hole d54 and is pre-tightened; simultaneously, all the bolts are screwed down, so that all parts of the whole device are tightly matched under the condition of uniform stress, the 45-degree injection angle Venturi throat 32 is connected with the front section 1 of the Venturi tube and the rear section 2 of the Venturi tube to form a complete Venturi structure, and the 45-degree injection hole 329 is communicated with the whole Venturi structure to form the whole 45-degree injection angle Venturi mixing device; the cross-sectional view of the 45 degree injection angle venturi mixing device is shown in figure 7.

Similar to fig. 1, 2, 3, 4 and 5, the venturi mixing device with the 30-degree injection angle has the following assembly flow: inserting a Venturi tube front section gasket 4 into a 30-degree injection angle Venturi throat 33, aligning a front section gasket through hole a41 with a through hole 3a331, aligning a front section gasket through hole b42 with a through hole 3b332, aligning a front section gasket through hole c43 with a through hole 3c333, aligning a front section gasket through hole d44 with a through hole 3d334, then inserting a Venturi tube front section 1 into the Venturi tube front section gasket 4, aligning a front section threaded blind hole a11 with a front section gasket through hole a41, aligning a front section threaded blind hole b12 with a front section gasket through hole b42, aligning a front section threaded blind hole c13 with a front section gasket through hole c43, and aligning a front section threaded blind hole d14 with a front section gasket through hole d 44; bolt a6 is threaded into a front section threaded blind hole a11 through a bolt gasket a18, a through hole 3a331 and a front section gasket through hole a41 and is pre-tightened, bolt b7 is threaded into a front section threaded blind hole b12 through a bolt gasket b19, a through hole 3b332 and a front section gasket through hole b42 and is pre-tightened, bolt c8 is threaded into a front section threaded blind hole c13 through a bolt gasket c20, a through hole 3c333 and a front section gasket through hole c43 and is pre-tightened, and bolt d9 is threaded into a front section threaded blind hole d14 through a bolt gasket d25, a through hole 3d334 and a front section gasket through hole d44 and is pre-tightened; inserting a rear gasket 5 of the venturi tube into a 30-degree injection angle venturi throat 33, aligning a rear gasket through hole a51 with a through hole 3e335, aligning a rear gasket through hole b52 with a through hole 3f336, aligning a rear gasket through hole c53 with a through hole 3g337, aligning a rear gasket through hole d54 with a through hole 3h338, then inserting a rear section 2 of the venturi tube into the rear gasket 5 of the venturi tube, aligning a rear threaded blind hole a21 with a rear gasket through hole a51, aligning a rear threaded blind hole b22 with a rear gasket through hole b52, aligning a rear threaded blind hole c23 with a rear gasket through hole c53, and aligning a rear threaded blind hole d24 with a rear gasket through hole d 54; penetrating a bolt e10 through a bolt gasket e26, a through hole 3e335 and a rear gasket through hole a51, screwing the bolt e10 into a rear threaded blind hole a21 and pre-tightening the bolt e26, penetrating a bolt f15 through a bolt gasket f27, a through hole 3f336 and a rear gasket through hole b52, screwing the bolt f15 into a rear threaded blind hole b22 and pre-tightening the bolt f 22, penetrating a bolt g16 through a bolt gasket g28, a through hole 3g337 and a rear gasket through hole c53, screwing the bolt h17 into a rear threaded blind hole c23 and pre-tightening the bolt h 24, penetrating a bolt gasket h29, a through hole 3h338 and a rear gasket through hole d54, and pre-tightening the bolt h 35; simultaneously, all the bolts are screwed down, so that all parts of the whole device are tightly matched under the condition of uniform stress, the 30-degree injection angle Venturi throat part 33 is connected with the front section 1 of the Venturi tube and the rear section 2 of the Venturi tube to form a complete Venturi structure, and the 30-degree injection hole 339 is communicated with the whole Venturi structure to form the whole 30-degree injection angle Venturi mixing device; the cross-sectional view of the venturi mixing device with the 30-degree injection angle is shown in fig. 8.

Similar to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the assembly flow of the venturi mixing device with the 15-degree injection angle is as follows: inserting a venturi tube front section gasket 4 into a 15-degree injection angle venturi throat 34, aligning a front section gasket through hole a41 with a through hole 4a341, aligning a front section gasket through hole b42 with a through hole 4b342, aligning a front section gasket through hole c43 with a through hole 4c343, aligning a front section gasket through hole d44 with a through hole 4d344, then inserting a venturi tube front section 1 into the venturi tube front section gasket 4, aligning a front section threaded blind hole a11 with a front section gasket through hole a41, aligning a front section threaded blind hole b12 with a front section gasket through hole b42, aligning a front section threaded blind hole c13 with a front section gasket through hole c43, and aligning a front section threaded blind hole d14 with a front section gasket through hole d 44; bolt a6 is threaded into a front section threaded blind hole a11 through a bolt gasket a18, a through hole 4a341 and a front section gasket through hole a41 and is pre-tightened, bolt b7 is threaded into a front section threaded blind hole b12 through a bolt gasket b19, a through hole 4b342 and a front section gasket through hole b42 and is pre-tightened, bolt c8 is threaded into a front section threaded blind hole c13 through a bolt gasket c20, a through hole 4c343 and a front section gasket through hole c43 and is pre-tightened, and bolt d9 is threaded into a front section threaded blind hole d14 through a bolt gasket d25, a through hole 4d344 and a front section gasket through hole d44 and is pre-tightened; inserting a venturi tube rear gasket 5 into a 15-degree injection angle venturi throat 34, aligning a rear gasket through hole a51 with a through hole 4e345, aligning a rear gasket through hole b52 with a through hole 4f346, aligning a rear gasket through hole c53 with a through hole 4g347, aligning a rear gasket through hole d54 with a through hole 4h348, then inserting a venturi tube rear section 2 into the venturi tube rear gasket 5, aligning a rear threaded blind hole a21 with a rear gasket through hole a51, aligning a rear threaded blind hole b22 with a rear gasket through hole b52, aligning a rear threaded blind hole c23 with a rear gasket through hole c53, and aligning a rear threaded blind hole d24 with a rear gasket through hole d 54; a bolt e10 is threaded into the rear-section threaded blind hole a21 through a bolt gasket e26, a through hole 4e345 and a rear-section gasket through hole a51 and is pre-tightened, a bolt f15 is threaded into the rear-section threaded blind hole b22 through a bolt gasket f27, a through hole 4f346 and a rear-section gasket through hole b52 and is pre-tightened, a bolt g16 is threaded into the rear-section threaded blind hole c23 through a bolt gasket g28, a through hole 4g347 and a rear-section gasket through hole c53 and is pre-tightened, and a bolt h17 is threaded into the rear-section threaded blind hole d24 through a bolt gasket h29, a through hole 4h348 and a rear-section gasket through hole d54 and is pre-tightened; simultaneously, all the bolts are screwed down, so that all parts of the whole device are tightly matched under the condition of uniform stress, the 15-degree injection angle Venturi throat part 34 is connected with the front section 1 of the Venturi tube and the rear section 2 of the Venturi tube to form a complete Venturi structure, and the 15-degree injection hole 349 is communicated with the whole Venturi structure to form the whole 15-degree injection angle Venturi mixing device; the cross-sectional view of the 15 degree injection angle venturi mixing device is shown in figure 9.

Similar to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the venturi mixing device with the injection angle of 10 degrees has the following assembly flow: inserting a venturi tube front section gasket 4 into a 10-degree injection angle venturi throat 35, aligning a front section gasket through hole a41 with a through hole 5a351, aligning a front section gasket through hole b42 with a through hole 5b352, aligning a front section gasket through hole c43 with a through hole 5c353, aligning a front section gasket through hole d44 with a through hole 5d354, then inserting a venturi tube front section 1 into the venturi tube front section gasket 4, aligning a front section threaded blind hole a11 with a front section gasket through hole a41, aligning a front section threaded blind hole b12 with a front section gasket through hole b42, aligning a front section threaded blind hole c13 with a front section gasket through hole c43, and aligning a front section threaded blind hole d14 with a front section gasket through hole d 44; a bolt a6 is threaded into a front section threaded blind hole a11 through a bolt gasket a18, a through hole 5a351 and a front section gasket through hole a41 and is pre-tightened, a bolt b7 is threaded into a bolt gasket b19, a through hole 5b352 and a front section gasket through hole b42 are threaded into a front section threaded blind hole b12 and is pre-tightened, a bolt c8 is threaded into a bolt gasket c20, a through hole 5c353 and a front section gasket through hole c43 and is threaded into a front section threaded blind hole c13 and is pre-tightened, and a bolt d9 is threaded into a front section threaded blind hole d14 through a bolt gasket d25, a through hole 5d354 and a front section gasket through hole d44 and is pre-tightened; inserting the rear gasket 5 of the venturi tube into the 10-degree injection angle venturi throat 35, aligning a rear gasket through hole a51 with a through hole 5e355, aligning a rear gasket through hole b52 with a through hole 5f356, aligning a rear gasket through hole c53 with a through hole 5g357, aligning a rear gasket through hole d54 with a through hole 5h358, then inserting the rear section 2 of the venturi tube into the rear gasket 5 of the venturi tube, aligning a rear threaded blind hole a21 with a rear gasket through hole a51, aligning a rear threaded blind hole b22 with a rear gasket through hole b52, aligning a rear threaded blind hole c23 with a rear gasket through hole c53, and aligning a rear threaded blind hole d24 with a rear gasket through hole d 54; bolt e10 is threaded into a rear-section threaded blind hole a21 through a bolt gasket e26, a through hole 5e355 and a rear-section gasket through hole a51 and is pre-tightened, bolt f15 is threaded into a rear-section threaded blind hole b22 through a bolt gasket f27, a through hole 5f356 and a rear-section gasket through hole b52 and is pre-tightened, bolt g16 is threaded into a rear-section threaded blind hole c23 through a bolt gasket g28, a through hole 5g357 and a rear-section gasket through hole c53 and is pre-tightened, and bolt h17 is threaded into a rear-section threaded blind hole d24 through a bolt gasket h29, a through hole 5h358 and a rear-section gasket through hole d54 and is pre-tightened; simultaneously, all the bolts are screwed down, so that all parts of the whole device are tightly matched under the condition of uniform stress, the 10-degree injection angle Venturi throat part 35 is connected with the front section 1 of the Venturi tube and the rear section 2 of the Venturi tube to form a complete Venturi structure, and the 10-degree injection hole 359 is communicated with the whole Venturi structure to form the whole 10-degree injection angle Venturi mixing device; the cross-sectional view of the venturi mixing device with a 10-degree injection angle is shown in fig. 10.

As shown in fig. 11 and 12, the venturi tube front section 1 is a venturi tapered section which is formed by adding a circular ring-shaped wall surface with an inner diameter of 180mm, an outer diameter of 230mm and a length of 40mm to a small end, wherein the inner diameter of the small end of the venturi tapered section is 180mm, the outer diameter of the small end of the venturi tapered section is 230mm, and the inner diameter of the large end of the venturi tapered section is 500mm and the outer diameter of the large end of the venturi tapered section is 550 mm; the total length of the front section 1 of the Venturi tube is 340 mm; the front section threaded blind hole a11, the front section threaded blind hole b12, the front section threaded blind hole c13 and the front section threaded blind hole d14 of the front section 1 of the venturi tube are uniformly distributed on the circular ring-shaped wall surface of the front section 1 of the venturi tube at intervals of 90 degrees in sequence; the distance between the central axis of the front-section threaded blind hole a11, the front-section threaded blind hole b12, the front-section threaded blind hole c13 and the front-section threaded blind hole d14 and the outer end face of the circular ring-shaped wall face is 20 mm; the thread sizes of the front section threaded blind hole a11, the front section threaded blind hole b12, the front section threaded blind hole c13 and the front section threaded blind hole d14 are all M16, and the depths are all 15 mm.

As shown in fig. 13 and 14, the venturi tube rear section 2 is a venturi diverging section in which a circular wall surface with an inner diameter of 180mm, an outer diameter of 230mm and a length of 40mm is added to a small end, the small end of the venturi diverging section has an inner diameter of 180mm and an outer diameter of 230mm, and the large end of the venturi diverging section has an inner diameter of 600mm and an outer diameter of 650 mm; the total length of the rear section 2 of the Venturi tube is 640 mm; the rear-section threaded blind hole a21, the rear-section threaded blind hole b22, the rear-section threaded blind hole c23 and the rear-section threaded blind hole d24 of the rear section 2 of the venturi tube are uniformly distributed on the circular wall surface of the rear section 2 of the venturi tube at intervals of 90 degrees in sequence; the distance between the central axis of the rear-section threaded blind hole a21, the rear-section threaded blind hole b22, the rear-section threaded blind hole c23 and the rear-section threaded blind hole d24 and the outer end face of the circular ring-shaped wall surface is 20 mm; the thread sizes of the rear-section threaded blind hole a21, the rear-section threaded blind hole b22, the rear-section threaded blind hole c23 and the rear-section threaded blind hole d24 are all M16, and the depths are all 15 mm.

As shown in fig. 15, the venturi throat group 3 is composed of 5 venturi throats with different injection angles, which are respectively a 60-degree injection angle venturi throat 31, a 45-degree injection angle venturi throat 32, a 30-degree injection angle venturi throat 33, a 15-degree injection angle venturi throat 34, and a 10-degree injection angle venturi throat 35.

As shown in fig. 16 and 17, the 60 ° jet angle venturi throat 31 is obtained by cutting off circular ring-shaped materials with an inner diameter of 180mm, an outer diameter of 240mm and a depth of 40mm from both ends of a straight pipe section with an inner diameter of 180mm, an outer diameter of 300mm and a length of 550mm to form a circular ring-shaped wall surface with an inner diameter of 240mm, an outer diameter of 300mm and a length of 40 mm; an injection inlet pipe section with the inner diameter of 20mm, the outer diameter of 30mm and the height of 40mm is arranged on a bus of the outer wall surface of the 60-degree injection angle Venturi throat part 31 and is 80mm away from the end surface of one side, the bottom of the injection inlet pipe section is communicated with an injection hole with the inner diameter of 20mm and the central axis of 60 degrees with the central axis of the 60-degree injection angle Venturi throat part 31, and the injection hole and the injection inlet pipe section form a 60-degree injection hole 319 together; the through holes 1a311, the through holes 1b312, the through holes 1c313 and the through holes 1d314 are sequentially and uniformly distributed on the circular ring-shaped wall surface close to the 60-degree injection hole 319 at intervals of 90 degrees, and the distances between the central axes of the through holes 1a311, the through holes 1b312, the through holes 1c313 and the through holes 1d314 and the outer end surface of the circular ring-shaped wall surface are all 20 mm; the through hole 1e315, the through hole 1f316, the through hole 1g317 and the through hole 1h318 are uniformly distributed on the circular ring-shaped wall surface far away from the 60-degree injection hole 319 at intervals of 90 degrees in sequence, and the distances between the central axes of the through hole 1e315, the through hole 1f316, the through hole 1g317 and the through hole 1h318 and the outer end surface of the circular ring-shaped wall surface are all 20 mm; the diameters of through hole 1a311, through hole 1b312, through hole 1c313, through hole 1d314, through hole 1e315, through hole 1f316, through hole 1g317, and through hole 1h318 are all 18 mm.

As shown in fig. 18 and 19, the 45 ° injection angle venturi throat 32 is obtained by cutting off circular ring-shaped materials with an inner diameter of 180mm, an outer diameter of 240mm and a depth of 40mm from both ends of a straight pipe section with an inner diameter of 180mm, an outer diameter of 300mm and a length of 550mm to form a circular ring-shaped wall surface with an inner diameter of 240mm, an outer diameter of 300mm and a length of 40 mm; an injection inlet pipe section with the inner diameter of 20mm, the outer diameter of 30mm and the height of 40mm is arranged on a bus of the outer wall surface of the 45-degree injection angle Venturi throat part 32 and is 80mm away from the end surface of one side, the bottom of the injection inlet pipe section is communicated with an injection hole with the inner diameter of 20mm and the central axis of 45 degrees with the central axis of the 45-degree injection angle Venturi throat part 32, and the injection hole and the injection inlet pipe section form a 45-degree injection hole 329 together; the through holes 2a321, the through holes 2b322, the through holes 2c323 and the through holes 2d324 are uniformly distributed on the circular ring-shaped wall surface close to the 45-degree injection hole 329 at intervals of 90 degrees in sequence, and the distances between the central axes of the through holes 2a321, the through holes 2b322, the through holes 2c323 and the through holes 2d324 and the outer end surface of the circular ring-shaped wall surface are all 20 mm; the through hole 2e325, the through hole 2f326, the through hole 2g327 and the through hole 2h328 are sequentially and uniformly distributed on the circular ring-shaped wall surface far away from the 45-degree injection hole 329 at intervals of 90 degrees, and the distances between the central axes of the through hole 2e325, the through hole 2f326, the through hole 2g327 and the through hole 2h328 and the outer end surface of the circular ring-shaped wall surface are all 20 mm; the diameters of through-hole 2a321, through-hole 2b322, through-hole 2c323, through-hole 2d324, through-hole 2e325, through-hole 2f326, through-hole 2g327, and through-hole 2h328 are all 18 mm.

As shown in fig. 20 and 21, the venturi throat 33 with a 30 ° ejection angle is obtained by cutting off circular ring-shaped materials with an inner diameter of 180mm, an outer diameter of 240mm and a depth of 40mm from both ends of a straight pipe section with an inner diameter of 180mm, an outer diameter of 300mm and a length of 550mm to form a circular ring-shaped wall surface with an inner diameter of 240mm, an outer diameter of 300mm and a length of 40 mm; an injection inlet pipe section with the inner diameter of 20mm, the outer diameter of 30mm and the height of 40mm is arranged on a bus of the outer wall surface of the 30-degree injection angle Venturi throat 33 and 80mm away from the end surface of one side, the bottom of the injection inlet pipe section is communicated with an injection hole with the inner diameter of 20mm and the central axis of 30 degrees with the central axis of the 30-degree injection angle Venturi throat 33, and the injection hole and the injection inlet pipe section form a 30-degree injection hole 339; the through holes 3a331, the through holes 3b332, the through holes 3c333 and the through holes 3d334 are sequentially and uniformly distributed on the circular ring-shaped wall surface close to the 30-degree injection hole 339 at intervals of 90 degrees, and the distances between the central axes of the through holes 3a331, the through holes 3b332, the through holes 3c333 and the through holes 3d334 and the outer end surface of the circular ring-shaped wall surface are all 20 mm; the through holes 3e335, 3f336, 3g337 and 3h338 are uniformly distributed on the circular ring-shaped wall surface far away from the 30-degree injection hole 339 at intervals of 90 degrees in sequence, and the distances between the central axes of the through holes 3e335, 3f336, 3g337 and 3h338 and the outer end surface of the circular ring-shaped wall surface are all 20 mm; the diameters of through hole 3a331, through hole 3b332, through hole 3c333, through hole 3d334, through hole 3e335, through hole 3f336, through hole 3g337, and through hole 3h338 are all 18 mm.

As shown in fig. 22 and 23, the 15 ° injection angle venturi throat 34 is obtained by cutting off circular ring-shaped materials with an inner diameter of 180mm, an outer diameter of 240mm and a depth of 40mm from both ends of a straight pipe section with an inner diameter of 180mm, an outer diameter of 300mm and a length of 550mm to form a circular ring-shaped wall surface with an inner diameter of 240mm, an outer diameter of 300mm and a length of 40 mm; an injection inlet pipe section with the inner diameter of 20mm, the outer diameter of 30mm and the height of 40mm is arranged on a bus of the outer wall surface of the 15-degree injection angle Venturi throat part 34 and is 80mm away from the end surface of one side, the bottom of the injection inlet pipe section is communicated with an injection hole with the inner diameter of 20mm and the central axis of 15 degrees with the central axis of the 15-degree injection angle Venturi throat part 34, and the injection hole and the injection inlet pipe section form a 15-degree injection hole 349; the through holes 4a341, the through holes 4b342, the through holes 4c343 and the through holes 4d344 are uniformly distributed on the circular ring-shaped wall surface close to the 15-degree injection hole 349 at intervals of 90 degrees in sequence, and the distances between the central axes of the through holes 4a341, the through holes 4b342, the through holes 4c343 and the through holes 4d344 and the outer end surface of the circular ring-shaped wall surface are all 20 mm; the through holes 4e345, the through holes 4f346, the through holes 4g347 and the through holes 4h348 are sequentially and uniformly distributed on the circular ring-shaped wall surface far away from the 15-degree injection hole 349 at intervals of 90 degrees, and the distances between the central axes of the through holes 4e345, the through holes 4f346, the through holes 4g347 and the through holes 4h348 and the outer end surface of the circular ring-shaped wall surface are all 20 mm; the diameters of the through-hole 4a341, the through-hole 4b342, the through-hole 4c343, the through-hole 4d344, the through-hole 4e345, the through-hole 4f346, the through-hole 4g347, and the through-hole 4h348 are all 18 mm.

As shown in fig. 24 and 25, the 10 ° venturi throat 35 is obtained by cutting off annular materials with an inner diameter of 180mm, an outer diameter of 240mm and a depth of 40mm from both ends of a straight pipe section with an inner diameter of 180mm, an outer diameter of 300mm and a length of 550mm to form an annular wall with an inner diameter of 240mm, an outer diameter of 300mm and a length of 40 mm; an injection inlet pipe section with the inner diameter of 20mm, the outer diameter of 30mm and the height of 40mm is arranged on a bus of the outer wall surface of the 10-degree injection angle Venturi throat part 35 and is 80mm away from the end surface of one side, the bottom of the injection inlet pipe section is communicated with an injection hole with the inner diameter of 20mm and the central axis of 10 degrees with the central axis of the 10-degree injection angle Venturi throat part 35, and the injection hole and the injection inlet pipe section form a 10-degree injection hole 359 together; the through holes 5a351, the through holes 5b352, the through holes 5c353 and the through holes 5d354 are uniformly distributed on the circular ring-shaped wall surface close to the 10-degree injection hole 359 at intervals of 90 degrees in sequence, and the distances between the central axes of the through holes 5a351, the through holes 5b352, the through holes 5c353 and the through holes 5d354 and the outer end surface of the circular ring-shaped wall surface are all 20 mm; the through hole 5e355, the through hole 5f356, the through hole 5g357 and the through hole 5h358 are sequentially and uniformly distributed on the circular ring-shaped wall surface far away from the 10-degree injection hole 359 at intervals of 90 degrees, and the distances between the central axes of the through hole 5e355, the through hole 5f356, the through hole 5g357 and the through hole 5h358 and the outer end surface of the circular ring-shaped wall surface are all 20 mm; the diameters of the through hole 5a351, the through hole 5b352, the through hole 5c353, the through hole 5d354, the through hole 5e355, the through hole 5f356, the through hole 5g357 and the through hole 1h358 are all 18 mm.

As shown in fig. 26, the venturi tube front gasket 4 is a circular rubber gasket with an inner diameter of 230mm, an outer diameter of 240mm and a width of 40 mm; the front section gasket through hole a41, the front section gasket through hole b42, the front section gasket through hole c43 and the front section gasket through hole d44 of the venturi tube front section gasket 4 are uniformly distributed on the annular venturi tube front section gasket 4 at an interval of 90 degrees in sequence; the distances between the central axes of the front section gasket through hole a41, the front section gasket through hole b42, the front section gasket through hole c43 and the front section gasket through hole d44 and the end faces of the two sides of the front section gasket 4 of the Venturi tube are all 20 mm; the diameters of front section shim through hole a41, front section shim through hole b42, front section shim through hole c43, and front section shim through hole d44 are all 20 mm.

As shown in fig. 27, the venturi tube rear gasket 5 is a circular rubber gasket with an inner diameter of 230mm, an outer diameter of 240mm and a width of 40 mm; rear gasket through hole a51, rear gasket through hole b52, rear gasket through hole c53, rear gasket through hole d54 of venturi tube rear gasket 5 evenly distribute on annular venturi tube rear gasket 5 at intervals of 90 degrees in proper order, rear gasket through hole a51, rear gasket through hole b52, the distance between the central axis of rear gasket through hole c53 and rear gasket through hole d54 and the terminal surface of venturi tube rear gasket 5 both sides is 20mm, rear gasket through hole a51, rear gasket through hole b52, rear gasket through hole c53 and the diameter of rear gasket through hole d54 are 20 mm.

With reference to fig. 1, 2, 3 and 4, in order to change the injection hole angle of the venturi mixing device, the tight fit of bolt a6, bolt b7, bolt c8, bolt d9, bolt e10, bolt f15, bolt g16 and bolt h17 should be removed, bolt washer a18, bolt washer b19, bolt washer c20, bolt washer d25, bolt washer e26, bolt washer f27, bolt washer g28, bolt washer h29, venturi front-section washer 4 and venturi rear-section washer 5 are removed, venturi front-section 1 and venturi rear-section 2 are pulled out, and venturi throat 31 with an injection angle of 60 ° is replaced with another throat in venturi throat group 3; if the 45-degree injection angle venturi throat 32 is selected, assembling of the 45-degree injection angle venturi throat 32, the front section 1 of the venturi tube, the rear section 2 of the venturi tube, the front section gasket 4 of the venturi tube, the rear section gasket 5 of the venturi tube, the bolt a6, the bolt b7, the bolt c8, the bolt d9, the bolt e10, the bolt f15, the bolt g16, the bolt h17, the bolt gasket a18, the bolt gasket b19, the bolt gasket c20, the bolt gasket d25, the bolt gasket e26, the bolt gasket f27, the bolt gasket g28 and the bolt gasket h29 is completed according to the assembling flow of the 45-degree injection angle venturi mixing device, and the 45-degree injection angle venturi mixing device is obtained; if the 30-degree injection angle venturi throat 33 is selected, assembling of the 30-degree injection angle venturi throat 33, the front section 1 of the venturi tube, the rear section 2 of the venturi tube, the front section gasket 4 of the venturi tube, the rear section gasket 5 of the venturi tube, the bolt a6, the bolt b7, the bolt c8, the bolt d9, the bolt e10, the bolt f15, the bolt g16, the bolt h17, the bolt gasket a18, the bolt gasket b19, the bolt gasket c20, the bolt gasket d25, the bolt gasket e26, the bolt gasket f27, the bolt gasket g28 and the bolt gasket h29 is completed according to the assembling flow of the 30-degree injection angle venturi mixing device, and the 30-degree injection angle venturi mixing device is obtained; if a 15-degree injection angle venturi throat 34 is selected, assembling the 15-degree injection angle venturi throat 34 with a venturi front section 1, a venturi rear section 2, a venturi front section gasket 4, a venturi rear section gasket 5, a bolt a6, a bolt b7, a bolt c8, a bolt d9, a bolt e10, a bolt f15, a bolt g16, a bolt h17, a bolt gasket a18, a bolt gasket b19, a bolt gasket c20, a bolt gasket d25, a bolt gasket e26, a bolt gasket f27, a bolt gasket g28 and a bolt gasket h29 according to the assembling process of the 15-degree injection angle venturi mixing device, so as to obtain the 15-degree injection angle venturi mixing device; if the venturi throat 35 with the 10-degree injection angle is selected, the venturi throat 35 with the 10-degree injection angle is assembled with the front section 1 of the venturi tube, the rear section 2 of the venturi tube, the front section gasket 4 of the venturi tube, the rear section gasket 5 of the venturi tube, the bolt a6, the bolt b7, the bolt c8, the bolt d9, the bolt e10, the bolt f15, the bolt g16, the bolt h17, the bolt gasket a18, the bolt gasket b19, the bolt gasket c20, the bolt gasket d25, the bolt gasket e26, the bolt gasket f27, the bolt gasket g28 and the bolt gasket h29 according to the assembling process of the venturi mixing device with the 10-degree injection angle, so that the venturi mixing device with the 10-degree injection angle is obtained.

As shown in fig. 6, when the 60-degree injection angle venturi throat 31 is fixed at the throat of the venturi tube, the injection angle corresponding to the injection hole is 60 degrees, the injection fluid flows into the venturi tube through the injection hole, the radial velocity is high, the penetrability in the working medium is high, and the injection fluid can be tangent to the lower wall surface of the throat on the other side of the injection hole when the flow velocity of the working medium is high, so that the venturi tube is suitable for the working condition of high flow velocity of the working medium; as shown in fig. 10, when the venturi throat 35 with the ejection angle of 10 degrees is fixed at the throat of the venturi tube, the ejection angle corresponding to the ejection hole is 10 degrees, the ejection fluid flows to the venturi tube through the ejection hole, the radial velocity is low, the penetrability in the working medium is weak, and the ejection fluid can only be tangent to the lower wall surface of the throat on the other side of the ejection hole when the flow velocity of the working medium is low, so that the ejector is suitable for the working condition with low flow velocity of the working medium.

In conclusion, the venturi mixing device is suitable for various flow speed working conditions by changing the throat part in the venturi mixing device and changing the mixing effect of the device, so that the labor and material costs are reduced; the angle of the injection angle of the throat part of the Venturi tube section is changed, so that the injection liquid is ensured to be tangent to the lower wall surface of the throat part on the other side of the injection hole, and the optimal mixing effect is achieved; the whole venturi mixing device is convenient to mount and dismount, and cleaning and replacement of all parts can be realized.

Claims (6)

1. A variable throat lead angle venturi mixing device, characterized by: the Venturi tube back section comprises a Venturi tube front section (1), a Venturi tube back section (2), a Venturi throat part group (3), a Venturi tube front section gasket (4), a Venturi tube back section gasket (5), a bolt a (6), a bolt b (7), a bolt c (8), a bolt d (9), a bolt e (10), a bolt f (15), a bolt g (16), a bolt h (17), a bolt gasket a (18), a bolt gasket b (19), a bolt gasket c (20), a bolt gasket d (25), a bolt gasket e (26), a bolt gasket f (27), a bolt gasket g (28) and a bolt gasket h (29); the front section (1) of the Venturi tube comprises a front section threaded blind hole a (11), a front section threaded blind hole b (12), a front section threaded blind hole c (13) and a front section threaded blind hole d (14); the rear section (2) of the Venturi tube comprises a rear-section threaded blind hole a (21), a rear-section threaded blind hole b (22), a rear-section threaded blind hole c (23) and a rear-section threaded blind hole d (24); the Venturi throat group (3) comprises a 60-degree injection angle Venturi throat (31), a 45-degree injection angle Venturi throat (32), a 30-degree injection angle Venturi throat (33), a 15-degree injection angle Venturi throat (34) and a 10-degree injection angle Venturi throat (35); the Venturi tube front section gasket (4) comprises a front section gasket through hole a (41), a front section gasket through hole b (42), a front section gasket through hole c (43) and a front section gasket through hole d (44); the venturi tube rear gasket (5) comprises a rear gasket through hole a (51), a rear gasket through hole b (52), a rear gasket through hole c (53) and a rear gasket through hole d (54); the 60-degree injection angle Venturi throat (31) comprises a through hole 1a (311), a through hole 1b (312), a through hole 1c (313), a through hole 1d (314), a through hole 1e (315), a through hole 1f (316), a through hole 1g (317), a through hole 1h (318) and a 60-degree injection hole (319); the venturi throat (32) with the ejection angle of 45 degrees comprises a through hole 2a (321), a through hole 2b (322), a through hole 2c (323), a through hole 2d (324), a through hole 2e (325), a through hole 2f (326), a through hole 2g (327), a through hole 2h (328) and an ejection hole (329) of 45 degrees; the 30-degree injection angle Venturi throat (33) comprises a through hole 3a (331), a through hole 3b (332), a through hole 3c (333), a through hole 3d (334), a through hole 3e (335), a through hole 3f (336), a through hole 3g (337), a through hole 3h (338) and a 30-degree injection hole (339); the 15-degree injection angle Venturi throat (34) comprises a through hole 4a (341), a through hole 4b (342), a through hole 4c (343), a through hole 4d (344), a through hole 4e (345), a through hole 4f (346), a through hole 4g (347), a through hole 4h (348) and a 15-degree injection hole (349); the 10-degree injection angle Venturi throat (35) comprises a through hole 5a (351), a through hole 5b (352), a through hole 5c (353), a through hole 5d (354), a through hole 5e (355), a through hole 5f (356), a through hole 5g (357), a through hole 5h (358) and a 10-degree injection hole (359).

2. The variable throat lead angle venturi mixing device of claim 1, wherein: the specific installation process of 60 degrees of injection angle venturi throat (31) as the venturi mixer throat is as follows: inserting a front section gasket (4) of the Venturi tube into a Venturi throat (31) with an injection angle of 60 degrees, aligning a front section gasket through hole a (41) with a through hole 1a (311), aligning a front section gasket through hole b (42) with a through hole 1b (312), aligning a front section gasket through hole c (43) with a through hole 1c (313), and aligning a front section gasket through hole d (44) with a through hole 1d (314); inserting the front section (1) of the Venturi tube into the front section gasket (4) of the Venturi tube, aligning a front section threaded blind hole a (11) with a front section gasket through hole a (41), aligning a front section threaded blind hole b (12) with a front section gasket through hole b (42), aligning a front section threaded blind hole c (13) with a front section gasket through hole c (43), and aligning a front section threaded blind hole d (14) with a front section gasket through hole d (44); a bolt a (6) is used for penetrating through a bolt gasket a (18), a through hole 1a (311), a front section gasket through hole a (41) and a front section threaded blind hole a (11) to be matched and fixed, a bolt b (7) penetrates through a bolt gasket b (19), a through hole 1b (312) and a front section gasket through hole b (42) and a front section threaded blind hole b (12) to be matched and fixed, a bolt c (8) penetrates through a bolt gasket c (20), a through hole 1c (313) and a front section gasket through hole c (43) and a front section threaded blind hole c (13) to be matched and fixed, and a bolt d (9) penetrates through a bolt gasket d (25), a through hole 1d (314) and a front section gasket through hole d (44) and a front section threaded blind hole d (14) to be matched and fixed; inserting the rear gasket (5) of the Venturi tube into the Venturi throat (31) with the ejection angle of 60 degrees, aligning a through hole a (51) of the rear gasket with a through hole 1e (315), aligning a through hole b (52) of the rear gasket with a through hole 1f (316), aligning a through hole c (53) of the rear gasket with a through hole 1g (317), and aligning a through hole d (54) of the rear gasket with a through hole 1h (318); inserting the rear section (2) of the Venturi tube into the rear section gasket (5) of the Venturi tube to enable the rear section threaded blind hole a (21) to be aligned with the rear section gasket through hole a (51), the rear section threaded blind hole b (22) to be aligned with the rear section gasket through hole b (52), the rear section threaded blind hole c (23) to be aligned with the rear section gasket through hole c (53), and the rear section threaded blind hole d (24) to be aligned with the rear section gasket through hole d (54); a bolt e (10) penetrates through a bolt gasket e (26), a through hole 1e (315), a rear gasket through hole a (51) and a rear threaded blind hole a (21) to be matched and fixed, a bolt f (15) penetrates through a bolt gasket f (27), a through hole 1f (316) and a rear gasket through hole b (52) and is matched and fixed with a rear threaded blind hole b (22), a bolt g (16) penetrates through a bolt gasket g (28), a through hole 1g (317) and a rear gasket through hole c (53) and is matched and fixed with a rear threaded blind hole c (23), a bolt h (17) penetrates through a bolt gasket h (29), a through hole 1h (318) and a rear gasket through hole d (54) and is matched and fixed with a rear threaded blind hole d (24), and the assembly of the 60-degree ejector angle Venturi mixer is completed; the specific installation process of the 45-degree injection angle Venturi throat (32), the 30-degree injection angle Venturi throat (33), the 15-degree injection angle Venturi throat (34) and the 10-degree injection angle Venturi throat (35) which are respectively used as the Venturi mixer throats is consistent with the installation process, and the 45-degree injection angle Venturi mixer, the 30-degree injection angle Venturi mixer, the 15-degree injection angle Venturi mixer and the 10-degree injection angle Venturi mixer can be respectively obtained after the installation is completed.

3. The variable throat lead angle venturi mixing device of claim 1, wherein: the front section (1) of the Venturi tube is a Venturi tapered section, a circular ring-shaped wall surface with the inner diameter of 180mm, the outer diameter of 230mm and the length of 40mm is additionally arranged at the small end of the Venturi tapered section, the inner diameter of the small end of the Venturi tapered section is 180mm, the outer diameter of the small end of the Venturi tapered section is 230mm, the inner diameter of the large end of the Venturi tapered section is 500mm, and the outer diameter of the large end of the Venturi tapered section is 550 mm; the total length of the front section (1) of the Venturi tube is 340 mm; the front section threaded blind hole a (11), the front section threaded blind hole b (12), the front section threaded blind hole c (13) and the front section threaded blind hole d (14) of the front section (1) of the Venturi tube are sequentially and uniformly distributed on the circular wall surface of the front section (1) of the Venturi tube at intervals of 90 degrees; the distance between the central axis of the front section threaded blind hole a (11), the front section threaded blind hole b (12), the front section threaded blind hole c (13) and the front section threaded blind hole d (14) and the outer end face of the circular ring-shaped wall surface is 20 mm; the thread sizes of the front section threaded blind hole a (11), the front section threaded blind hole b (12), the front section threaded blind hole c (13) and the front section threaded blind hole d (14) are all M16, and the depths are all 15 mm.

4. The variable throat lead angle venturi mixing device of claim 1, wherein: the rear section (2) of the Venturi tube is a Venturi gradually-expanding section, wherein a circular ring-shaped wall surface with the inner diameter of 180mm, the outer diameter of 230mm and the length of 40mm is additionally arranged at the small end of the Venturi gradually-expanding section, the inner diameter of the small end of the Venturi gradually-expanding section is 180mm, the outer diameter of the small end of the Venturi gradually-expanding section is 230mm, the inner diameter of the large end of the Venturi gradually-expanding section is 600mm, and the outer diameter of the large end of the Venturi gradually-expanding section is 650 mm; the total length of the rear section (2) of the Venturi tube is 640 mm; the rear-section threaded blind hole a (21), the rear-section threaded blind hole b (22), the rear-section threaded blind hole c (23) and the rear-section threaded blind hole d (24) of the rear section (2) of the Venturi tube are uniformly distributed on the circular wall surface of the rear section (2) of the Venturi tube at intervals of 90 degrees in sequence; the distance between the central axis of the rear-section threaded blind hole a (21), the rear-section threaded blind hole b (22), the rear-section threaded blind hole c (23) and the rear-section threaded blind hole d (24) and the outer end face of the circular ring-shaped wall surface is 20 mm; the thread sizes of the rear-section thread blind hole a (21), the rear-section thread blind hole b (22), the rear-section thread blind hole c (23) and the rear-section thread blind hole d (24) are all M16, and the depths are all 15 mm.

5. The variable throat lead angle venturi mixing device of claim 1, wherein: the 60-degree injection angle Venturi throat (31) is obtained by cutting annular materials with the inner diameter of 180mm, the outer diameter of 240mm and the depth of 40mm from two ends of a straight pipe section with the inner diameter of 300mm and the length of 550mm to form an annular wall surface with the inner diameter of 240mm, the outer diameter of 300mm and the length of 40 mm; an injection inlet pipe section with the inner diameter of 20mm, the outer diameter of 30mm and the height of 40mm is arranged on a bus of the outer wall surface of the 60-degree injection angle Venturi throat part (31) and is 80mm away from the end surface of one side, the bottom of the injection inlet pipe section is communicated with an injection hole with the inner diameter of 20mm and the central axis of 60-degree injection angle Venturi throat part (31) forming 60-degree injection holes (319) together with the injection inlet pipe section; the through holes 1a (311), 1b (312), 1c (313) and 1d (314) are uniformly distributed on the circular ring-shaped wall surface close to the 60-degree injection hole (319) at intervals of 90 degrees in sequence, and the distances between the central axes of the through holes 1a (311), 1b (312), 1c (313) and 1d (314) and the outer end surface of the circular ring-shaped wall surface are all 20 mm; the through holes 1e (315), 1f (316), 1g (317) and 1h (318) are uniformly distributed on the circular ring-shaped wall surface far away from the 60-degree injection hole (319) at intervals of 90 degrees in sequence, and the distances between the central axes of the through holes 1e (315), 1f (316), 1g (317) and 1h (318) and the outer end surface of the circular ring-shaped wall surface are all 20 mm; the diameters of through hole 1a (311), through hole 1b (312), through hole 1c (313), through hole 1d (314), through hole 1e (315), through hole 1f (316), through hole 1g (317) and through hole 1h (318) are all 18 mm; 45 draw angle venturi throat (32), 30 draw angle venturi throat (33), 15 draw angle venturi throat (34) and 10 draw angle venturi throat (35) and 60 draw angle venturi throat (31) and compare, except that the angle of drawing the hole is different, all the other structures are identical: the ejection angle corresponding to the 45-degree ejection hole (329) on the 45-degree ejection angle Venturi throat (32) is 45 degrees; the injection angle corresponding to the 30-degree injection hole (339) on the 30-degree injection angle Venturi throat (33) is 30 degrees; the injection angle corresponding to the 15-degree injection hole (349) on the 15-degree injection angle Venturi throat part (34) is 15 degrees; the injection angle corresponding to the 10-degree injection hole (359) on the 10-degree injection angle Venturi throat (35) is 10 degrees.

6. The variable throat lead angle venturi mixing device of claim 1, wherein: the Venturi tube front section gasket (4) and the Venturi tube rear section gasket (5) are both annular rubber gaskets with the inner diameter of 230mm, the outer diameter of 240mm and the width of 40 mm; the front section gasket through hole a (41), the front section gasket through hole b (42), the front section gasket through hole c (43) and the front section gasket through hole d (44) of the Venturi tube front section gasket (4) are uniformly distributed on the annular Venturi tube front section gasket (4) at intervals of 90 degrees in sequence, and the distances between the central axes of the front section gasket through hole a (41), the front section gasket through hole b (42), the front section gasket through hole c (43) and the front section gasket through hole d (44) and the end faces at the two sides of the Venturi tube front section gasket (4) are both 20 mm; the rear gasket through hole a (51), the rear gasket through hole b (52), the rear gasket through hole c (53) and the rear gasket through hole d (54) of the venturi tube rear gasket (5) are sequentially and uniformly distributed on the annular venturi tube rear gasket (5) at intervals of 90 degrees, and the distances between the central axes of the rear gasket through hole a (51), the rear gasket through hole b (52), the rear gasket through hole c (53) and the rear gasket through hole d (54) and the end faces on the two sides of the venturi tube rear gasket (5) are all 20 mm; the diameters of the front section gasket through hole a (41), the front section gasket through hole b (42), the front section gasket through hole c (43), the front section gasket through hole d (44), the rear section gasket through hole a (51), the rear section gasket through hole b (52), the rear section gasket through hole c (53) and the rear section gasket through hole d (54) are all 20 mm.

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