CN112474094B - Remote jetting method and device for supersonic airflow and rotational flow negative pressure coupling - Google Patents
Remote jetting method and device for supersonic airflow and rotational flow negative pressure coupling Download PDFInfo
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- CN112474094B CN112474094B CN202011320782.9A CN202011320782A CN112474094B CN 112474094 B CN112474094 B CN 112474094B CN 202011320782 A CN202011320782 A CN 202011320782A CN 112474094 B CN112474094 B CN 112474094B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
- B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
Abstract
The invention provides a remote jetting method for supersonic airflow and cyclone negative pressure coupling.A jetting channel of an effective medium is bounded by an effective medium introducing position, a mixing section is arranged behind the effective medium introducing position, and a cyclone section is arranged in front of the effective medium jetting channel; forming a supersonic jet flow which linearly advances along the central axis by utilizing a Laval pipe along the injection direction in the cyclone section, and forming a peripheral cyclone flow which is independent and surrounds the periphery of the supersonic jet flow to advance in a whirling manner by utilizing a cyclone channel; the supersonic jet flow and the peripheral rotational flow enter the mixing section to be coupled to form a composite flow, the effective medium introduced into the mixing section is carried, the air resistance on the effective medium injection path is reduced by means of the negative pressure generated by the peripheral rotational flow, the injection speed of the effective medium is improved by means of the supersonic jet flow, and remote injection of the effective medium is achieved. The invention simultaneously provides three structural forms of devices for realizing the method. Compared with the prior art, the invention can greatly improve the range of the effective medium under the same power condition.
Description
Technical Field
The invention relates to the technical field of public safety, in particular to a remote jetting method and a remote jetting device for supersonic airflow and rotational flow negative pressure coupling.
Background
The realization of the remote spraying of the effective medium has important meanings of enhancing the effect, expanding the action area, reducing the use cost, improving the safety of field operators and instruments and equipment and the like in the fields of safety, sanitation, agriculture, environmental protection and the like. The development idea of the existing remote spraying technology mostly focuses on lifting inlet end power, for example, patent CN202010245877.2 and patent CN201020139897.3 use a high-speed wind flow generated by a fan to lift the spraying distance of the mist-like medium, and the range limit of the technology is limited by the power of the power plant. Currently, there are few remote spray technologies developed from the perspective of reducing jet path resistance.
Disclosure of Invention
The present invention aims to solve the above technical problem at least to some extent. Therefore, the invention provides a remote injection method and a remote injection device for coupling supersonic airflow and rotational flow negative pressure, wherein the supersonic airflow is formed by utilizing a Laval tube structure to increase the central boosting gas speed, the resistance on an effective medium injection path is reduced by utilizing peripheral rotational flow, and the range of an effective medium can be greatly increased under the same power condition.
In order to realize the purpose, the invention adopts the following technical scheme:
a remote jetting method of supersonic airflow and rotational flow negative pressure coupling is characterized in that an effective medium introducing position is used as a boundary in a jetting channel of an effective medium, then a mixing section is arranged, the front section is a rotational flow section, and the effective medium is introduced into the mixing section from the effective medium introducing position along the jetting direction;
forming a supersonic jet flow which linearly advances along the central axis by utilizing a Laval pipe in the swirl section along the injection direction, and forming a peripheral swirl flow which is independent and surrounds the periphery of the supersonic jet flow and advances in a swirling manner by utilizing a swirl channel;
the supersonic jet flow and the peripheral rotational flow enter the mixing section to be coupled to form a composite flow, the effective medium entering position is used for carrying the introduced effective medium, a central low-pressure low-resistance area is formed by means of the centrifugal effect of the peripheral rotational flow so as to reduce the air resistance on the effective medium injection path, and the supersonic jet flow is used for forming boosting to the effective medium so as to improve the injection speed of the effective medium and realize the remote injection of the effective medium.
The method of the invention is also characterized in that:
the laval pipe and the rotational flow channel are coaxial with the injection channel, the laval pipe in the rotational flow section is arranged in the middle along the central axis of the injection channel, and an annular area formed between the outer wall of the laval pipe and the inner wall of the injection channel serves as the rotational flow channel.
The peripheral rotational flow is formed by introducing a power medium into the rotational flow channel along the injection direction and utilizing the flow guiding effect of helical blades spirally arranged in the rotational flow channel along the injection direction.
Or the peripheral rotational flow is formed by introducing a power medium into the rotational flow channel along the tangential direction tangent to the inner wall of the injection channel and relying on inertia under the constraint of the annular inner wall of the rotational flow channel.
The effective medium introduced into the mixing section is sprayed in a single point or multiple points.
The effective medium types suitable for use include dry powder, fog drops, foam, and disinfectant.
The supersonic jet takes compressible fluid as a power medium; the peripheral rotational flow takes high-speed fluid as a power medium.
The invention also provides a device for realizing the supersonic airflow and rotational flow negative pressure coupling remote injection method, which is structurally characterized in that:
a through cylindrical cavity formed in the device is used as an injection channel, the inlet position of an effective medium is used as a boundary, a mixing section of the injection channel is arranged behind the injection channel along the injection direction, and a swirling section of the injection channel is arranged in front of the mixing section;
an effective medium conveying channel which is directly inserted into the jet channel along the radial direction is arranged for leading in effective medium, a port exposed out of the device is used as an effective medium inlet, and the tail section of the channel inserted into the jet channel is arranged in the jet channel along the jet direction, is centered and is coaxially arranged in the jet channel;
a laval pipe and a rotational flow channel which are coaxial with the injection channel are arranged in the rotational flow section along the whole section, the laval pipe is arranged in the rotational flow section in the center, the inner area of the laval pipe is a contraction pipe section, a throat pipe section and an expansion pipe section along the injection direction in sequence, the inlet section of the laval pipe is formed by axially extending from the port of the contraction pipe section to the outside of the injection channel along the same inner radial direction, and the port of the expansion pipe section is opposite to the effective medium conveying channel;
in the whirl section, form annular region between Laval pipe outer wall and the injection passage inner wall, establish the helical blade who is the spiral arrangement in the whirl section whole section along the injection direction in annular region to communicate with each other in the tangential whirl entry on front end and the device, constitute the whirl passageway, the outer one end of whirl passageway orientation injection passage is sealed, and the power medium of peripheral whirl lets in the annular region of whirl passageway along being tangent tangential direction with the injection passage inner wall through tangential whirl entry, relies on inertia to form under the restraint of annular inner wall and helical blade's water conservancy diversion effect peripheral whirl.
The invention also provides a device for realizing the supersonic airflow and rotational flow negative pressure coupled remote injection method, which is structurally characterized in that:
a through cylindrical cavity formed in the device is used as a spraying channel, the passing position of an effective medium is used as a boundary, a mixing section of the spraying channel is arranged behind the spraying direction, and a rotational flow section of the spraying channel is arranged in front of the mixing section;
an effective medium conveying channel which is directly inserted into the jet channel along the radial direction is arranged for leading in effective medium, a port exposed out of the device is used as an effective medium inlet, and the tail section of the channel inserted into the jet channel is arranged in the jet channel along the jet direction, is centered and is coaxially arranged in the jet channel;
a laval pipe and a rotational flow channel which are coaxial with the injection channel are arranged in the rotational flow section along the whole section, the laval pipe is arranged in the rotational flow section in the middle, the inner area of the laval pipe is sequentially provided with a contraction pipe section, a throat pipe section and an expansion pipe section along the injection direction, the laval pipe extends axially from the port of the contraction pipe section to the outside of the injection channel according to the equal inner diameter, so as to form an inlet section of the laval pipe, and the port of the expansion pipe section is opposite to the effective medium conveying channel;
in the cyclone section, an annular area is formed between the outer wall of the Laval pipe and the inner wall of the injection channel, helical blades which are arranged spirally are arranged in the annular area in the whole section of the cyclone section along the injection direction to form the cyclone channel, the cyclone channel is axially communicated, and one end facing the outside of the injection channel is used as a cyclone inlet.
The invention also provides another device for realizing the supersonic airflow and rotational flow negative pressure coupled remote injection method, which is structurally characterized in that:
a through cylindrical cavity formed in the device is used as a spraying channel, the passing position of an effective medium is used as a boundary, a mixing section of the spraying channel is arranged behind the spraying direction, and a rotational flow section of the spraying channel is arranged in front of the mixing section;
the effective medium conveying channel which is directly inserted into the spraying channel along the radial direction is used for introducing effective media, a port exposed outside the device is used as an effective medium inlet, and the tail section of the channel inserted into the spraying channel is arranged in the spraying channel in a centered and coaxial manner along the spraying direction;
a laval pipe and a rotational flow channel which are coaxial with the injection channel are arranged in the rotational flow section along the whole section, the laval pipe is arranged in the rotational flow section in the middle, the inner area of the laval pipe is sequentially provided with a contraction pipe section, a throat pipe section and an expansion pipe section along the injection direction, the laval pipe extends axially from the port of the contraction pipe section to the outside of the injection channel according to the equal inner diameter, so as to form an inlet section of the laval pipe, and the port of the expansion pipe section is opposite to the effective medium conveying channel;
in the whirl section, form annular region between Laval pipe outer wall and the injection passage inner wall, annular region communicates with each other in front end and the tangential whirl entry on the device, constitutes the whirl passageway, the whirl passageway is sealed towards the outer one end of injection passage, and the power medium of peripheral whirl is in the annular region that lets in the whirl passageway along the tangential direction that is tangent with the injection passage inner wall through tangential whirl entry, relies on inertia to form under the restraint of annular inner wall peripheral whirl.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention firstly proposes that the Laval pipe is used for forming the supersonic jet flow to boost the effective medium, the injection speed of the effective medium is improved, and the peripheral rotational flow is used for reducing the air density and the pressure intensity on the injection path of the effective medium, so as to reduce the air resistance on the injection path of the effective medium, and the reduction of the air density and the pressure intensity further promotes the rising of the supersonic jet flow speed, so that the invention realizes the remote injection of the effective medium by the composite flow formed by the supersonic jet flow and the peripheral rotational flow, and can greatly improve the range of the effective medium compared with the prior art under the same power condition;
2. the composite flow designed by the invention can promote the effective medium to be fully mixed with the boosting fluid, and in addition, different effective media, boosting media, swirling flow media and power machinery can be selected according to actual conditions, so that the composite flow has wide practicability in engineering practice.
Drawings
FIG. 1 is a schematic sectional view showing the structure of embodiment 1;
FIG. 2 is a schematic perspective view of the structure of example 1;
FIG. 3 is a schematic perspective view of the embodiment 2;
FIG. 4 is a schematic sectional view showing the structure of embodiment 2;
FIG. 5 is a schematic front view showing the structure of embodiment 2;
FIG. 6 is a schematic sectional view of the tangential cyclone inlet B-B in FIG. 5;
FIG. 7 is a schematic view of the structure of embodiment 3;
FIG. 8 is a schematic sectional view showing the structure of embodiment 3;
FIG. 9 is a schematic front view showing the structure of embodiment 3;
FIG. 10 is a schematic cross-sectional view of the tangential cyclone inlet of FIG. 9 taken along the direction C-C.
In the figure, 1 an inlet section; 2, a rotational flow section; 3, a mixing section; 4 effective medium conveying channel; 5 Laval tube; 51 shrinking the pipe section; a 52 throat section; 53 expanding the tube section; 6 an annular region; 7, a helical blade; 8, a tangential rotational flow inlet; 9 swirl inlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
The remote jetting method of supersonic airflow and rotational flow negative pressure coupling of the embodiment of the invention is characterized in that an effective medium is injected into a jetting channel of the effective medium, the effective medium is bounded by an effective medium injection position, then a mixing section 3, and then a rotational flow section 2, wherein the effective medium is injected into the mixing section 3 from the effective medium injection position along the jetting direction;
forming a supersonic jet flow which linearly advances along the central axis by using a Laval tube 5 along the injection direction in the cyclone section 2, and forming a peripheral cyclone flow which is independent and surrounds the periphery of the supersonic jet flow and advances in a whirling manner by using a cyclone channel;
the supersonic jet flow and the peripheral rotational flow enter the mixing section 3 to be coupled to form a composite flow, the effective medium entering position is loaded with the introduced effective medium, a central low-pressure low-resistance area is formed by the centrifugal action of the peripheral rotational flow so as to reduce the air resistance on the effective medium injection path, and the supersonic jet flow is used for forming the boosting to the effective medium so as to improve the injection speed of the effective medium and realize the remote injection of the effective medium.
In the specific implementation:
The effective medium introduced into the mixing section 3 is sprayed in a single-point mode or in multiple-point mode.
The applicable effective medium types comprise dry powder, fog drops, foam and sterilizing agents.
Supersonic jet takes compressible fluid as a power medium, such as subsonic gas; the peripheral rotational flow takes high-speed fluid as a power medium, and can adopt air, nitrogen, carbon dioxide or other gases, and can also adopt liquid such as water and the like according to actual needs.
The way of forming the peripheral swirling flow in the swirling flow passage may be:
the peripheral rotational flow is formed by introducing a power medium into the rotational flow channel along the injection direction and utilizing the flow guiding effect of helical blades 7 spirally arranged in the rotational flow channel along the injection direction;
or the peripheral rotational flow is formed by introducing a power medium into the rotational flow channel along the tangential direction tangent to the inner wall of the injection channel and relying on inertia under the constraint of the annular inner wall of the rotational flow channel;
or the two structural forms are combined, a power medium is introduced into the rotational flow channel along the tangential direction tangent to the inner wall of the injection channel, the helical blade 7 is arranged in the rotational flow channel, and the stable peripheral rotational flow is formed jointly by combining the flow guiding effect of the helical blade 7.
The following examples 1 to 3 are described in detail.
Example 1:
referring to fig. 1 to 2, the apparatus for implementing the supersonic airflow and rotational flow negative pressure coupled remote spraying method of the present embodiment is configured as follows:
a through cylindrical cavity formed in the device is used as a spraying channel, the inlet position of an effective medium is used as a boundary, a mixing section 3 of the spraying channel is arranged behind the spraying channel along the spraying direction, and a swirling section 2 of the spraying channel is arranged in front of the mixing section;
an effective medium conveying channel 4 which is directly inserted into the jet channel along the radial direction is used for introducing effective media, a port exposed out of the device is used as an effective medium inlet, and the tail section of the channel inserted into the jet channel is centered and coaxially arranged in the jet channel along the jet direction;
a laval pipe 5 and a swirl flow channel which are coaxial with the injection channel are arranged along the whole section in the swirl section 2, the laval pipe 5 is arranged in the swirl section 2 in the center, the inner area of the laval pipe is a contraction pipe section 51, a throat pipe section 52 and an expansion pipe section 53 in sequence along the injection direction, the inlet section 1 of the laval pipe 5 is formed by extending from the port of the contraction pipe section 51 to the outside of the injection channel along the axial direction according to the equal inner diameter, and the port of the expansion pipe section 53 is opposite to the effective medium conveying channel 4;
in the whirl section 2, form annular region 6 between 5 outer walls of Laval pipe and the injection passageway inner wall, establish helical blade 7 that is the spiral arrangement in annular region 6 in 2 whole sections of whirl section along the injection direction, constitute the whirl passageway, the whirl passageway axial link up, the outer one end as whirl entry 9 of orientation injection passageway.
The port of the converging pipe section of the laval pipe can be formed into an inlet section 1 by adopting a way that the pipe sections are detachably connected, wherein the inlet section is connected to be exposed out of the injection channel in fig. 1, and the inlet section is not completely connected to be not exposed out of the injection channel in fig. 2.
The working principle is as follows:
the subsonic gas is introduced into the Laval tube 5 through the port of the inlet section 1, when the subsonic gas reaches the throat section 52 through the contraction tube section 51 of the Laval tube 5, the volume of the subsonic gas is compressed, the density of the subsonic gas is increased, then the subsonic gas enters the expansion tube section 53 through the throat section 52, the density of the subsonic gas is rapidly reduced, the jet speed of the subsonic gas reaches supersonic speed, supersonic speed gas flow is formed, and the supersonic speed gas flow is used as boosting fluid of an effective medium;
a power medium for forming peripheral rotational flow, such as high-speed liquid or compressed gas, is introduced into the rotational flow channel through the rotational flow inlet 9, and stable peripheral rotational flow which moves forward in a rotating manner is formed under the guide effect of the helical blades 7;
the supersonic airflow and the peripheral rotational flow are independent from each other in the rotational flow section 2, and lose the isolation constraint to form a composite flow when entering the mixing section 3, so that the effective medium introduced into the mixing section 3 through the effective medium conveying channel 4 is accelerated and uniformly mixed, and the remote injection is realized.
Example 2:
referring to fig. 3 to fig. 6, the apparatus for implementing the remote spraying method of coupling supersonic airflow and swirl negative pressure in this embodiment is configured as follows:
a through cylindrical cavity formed in the device is used as a spraying channel, the inlet position of an effective medium is used as a boundary, a mixing section 3 of the spraying channel is arranged behind the spraying channel along the spraying direction, and a swirling section 2 of the spraying channel is arranged in front of the mixing section;
the effective medium conveying channel 4 which is directly inserted into the injection channel along the radial direction is used for introducing effective media, a port exposed outside the device is used as an effective medium inlet, and the tail section of the channel inserted into the injection channel is arranged in the injection channel in a centered and coaxial manner along the injection direction;
the Laval pipe 5 and the rotational flow channel which are coaxial with the injection channel are arranged in the rotational flow section 2 along the whole section, the Laval pipe 5 is arranged in the rotational flow section 2 in the center, the inner area of the pipe is sequentially provided with a contraction pipe section 51, a throat pipe section 52 and an expansion pipe section 53 along the injection direction, the inlet section 1 of the Laval pipe 5 is formed by axially extending the port of the contraction pipe section 51 along the outer edge of the injection channel according to the equal inner diameter, and the port of the expansion pipe section 53 is opposite to the effective medium conveying channel 4;
in the whirl section 2, form annular region 6 between 5 outer walls of laval pipe and the injection passage inner wall, annular region 6 communicates with each other with the tangential whirl entry 8 on the device in the front end, constitutes the whirl passageway, and the whirl passageway is sealed towards the outer one end of injection passage, and the power medium of peripheral whirl lets in the annular region 6 of whirl passageway through tangential whirl entry 8 along the tangential direction that is tangent with the injection passage inner wall in, relies on inertia to form peripheral whirl under the restraint of annular inner wall.
The working principle is as follows:
the subsonic gas is introduced into the Laval tube 5 through the port of the inlet section 1, when the subsonic gas reaches the throat section 52 through the contraction tube section 51 of the Laval tube 5, the volume of the subsonic gas is compressed, the density of the subsonic gas is increased, then the subsonic gas enters the expansion tube section 53 through the throat section 52, the density of the subsonic gas is rapidly reduced, the jet speed of the subsonic gas reaches supersonic speed, supersonic speed gas flow is formed, and the supersonic speed gas flow is used as boosting fluid of an effective medium;
a power medium for forming peripheral rotational flow, such as high-speed liquid or compressed gas, is introduced into the rotational flow channel through the tangential rotational flow inlet 8, is introduced into the rotational flow channel along the tangential direction tangential to the inner wall of the injection channel, and forms peripheral rotational flow by means of inertia under the constraint of the annular inner wall of the rotational flow channel;
the supersonic airflow and the peripheral rotational flow are independent from each other in the rotational flow section 2, and lose the isolation constraint to form a composite flow when entering the mixing section 3, so that the effective medium introduced into the mixing section 3 through the effective medium conveying channel 4 is accelerated and uniformly mixed, and the remote injection is realized.
Example 3:
referring to fig. 7 to 10, the apparatus for implementing the supersonic airflow and rotational flow negative pressure coupled remote spraying method of the present embodiment is configured as follows:
a through cylindrical cavity formed in the device is used as a spraying channel, the passing position of an effective medium is used as a boundary, a mixing section 3 of the spraying channel is arranged behind the spraying direction, and a rotational flow section 2 of the spraying channel is arranged in front of the mixing section;
an effective medium conveying channel 4 which is directly inserted into the jet channel along the radial direction is used for introducing effective media, a port exposed out of the device is used as an effective medium inlet, and the tail section of the channel inserted into the jet channel is centered and coaxially arranged in the jet channel along the jet direction;
the Laval pipe 5 and the rotational flow channel which are coaxial with the injection channel are arranged in the rotational flow section 2 along the whole section, the Laval pipe 5 is arranged in the rotational flow section 2 in the center, the inner area of the pipe is sequentially provided with a contraction pipe section 51, a throat pipe section 52 and an expansion pipe section 53 along the injection direction, the inlet section 1 of the Laval pipe 5 is formed by axially extending the port of the contraction pipe section 51 along the outer edge of the injection channel according to the equal inner diameter, and the port of the expansion pipe section 53 is opposite to the effective medium conveying channel 4;
in the whirl section 2, form annular region 6 between 5 outer walls of laval pipe and the injection passage inner wall, the annular region 6 is interior 2 whole sections of whirl section establish the helical blade 7 that is the spiral arrangement along the injection direction, and communicate with each other with tangential whirl entry 8 on the device in the front end, constitute the whirl passageway, the whirl passageway seals towards the outer one end of injection passage, the power medium of peripheral whirl lets in the annular region 6 of whirl passageway along the tangential direction that is tangent with the injection passage inner wall through tangential whirl entry 8, rely on inertia to form peripheral whirl under the restraint of annular inner wall and under helical blade 7's water conservancy diversion effect.
The working principle is as follows:
subsonic gas is introduced into the Laval pipe 5 through the port of the inlet section 1, when the subsonic gas reaches the throat section 52 through the contraction pipe section 51 of the Laval pipe 5, the volume is compressed and the density is increased, then the subsonic gas enters the expansion pipe section 53 through the throat section 52, the density is rapidly reduced, the jet speed of the gas reaches supersonic speed, and supersonic airflow is formed and is used as boosting fluid of an effective medium;
a power medium for forming peripheral rotational flow, such as high-speed liquid or compressed gas, is introduced into the rotational flow channel through the tangential rotational flow inlet 8, is introduced into the rotational flow channel along the tangential direction tangent to the inner wall of the injection channel, and forms stable peripheral rotational flow which moves in a circling manner under the restraint of the annular inner wall of the rotational flow channel and the guide action of the helical blade 7 by means of inertia;
the supersonic airflow and the peripheral rotational flow are independent from each other in the rotational flow section 2, and lose the isolation constraint to form a composite flow when entering the mixing section 3, so that the effective medium introduced into the mixing section 3 through the effective medium conveying channel 4 is accelerated and uniformly mixed, and the remote injection is realized.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A remote jetting method of supersonic airflow and rotational flow negative pressure coupling is characterized in that:
in an injection channel of an effective medium, an effective medium introducing position is used as a boundary, then a mixing section (3) is arranged, and the front part is a rotational flow section (2), wherein the effective medium is introduced into the mixing section (3) from the effective medium introducing position along an injection direction;
forming a supersonic jet flow which linearly advances along a central axis in the swirl section (2) along the injection direction by using a Laval tube (5), and forming a peripheral swirl flow which is independent and surrounds the periphery of the supersonic jet flow and advances in a swirling manner by using a swirl channel;
the supersonic jet takes compressible fluid as a power medium, and the peripheral rotational flow takes high-speed fluid as the power medium;
the supersonic jet flow and the peripheral rotational flow enter the mixing section (3) in a coupling mode to form a composite flow, an introduced effective medium is carried at an effective medium introduction position, a central low-pressure low-resistance area is formed by means of the centrifugal effect of the peripheral rotational flow to reduce air resistance on an effective medium injection path, and the supersonic jet flow is used for forming boosting to the effective medium to improve the injection speed of the effective medium and achieve remote injection of the effective medium.
2. The supersonic gas flow and swirl negative pressure coupled remote injection method of claim 1, further comprising:
the laval tube (5) and the rotational flow channel are coaxial with the injection channel, the laval tube (5) in the rotational flow section (2) is arranged in the middle along the central axis of the injection channel, and an annular area (6) formed between the outer wall of the laval tube (5) and the inner wall of the injection channel is used as the rotational flow channel.
3. The supersonic gas flow and cyclone negative pressure coupled remote spraying method according to claim 1 or 2, characterized in that:
the peripheral rotational flow is formed by introducing a power medium into the rotational flow channel along the injection direction and utilizing the flow guiding effect of helical blades (7) which are spirally arranged in the rotational flow channel along the injection direction.
4. A supersonic gas flow and swirl flow negative pressure coupled remote injection method according to claim 1 or 2, characterized in that:
the peripheral rotational flow is formed by introducing a power medium into the rotational flow channel along the tangential direction tangent to the inner wall of the injection channel and relying on inertia under the constraint of the annular inner wall of the rotational flow channel.
5. The supersonic gas flow and cyclone negative pressure coupled remote injection method of claim 1, wherein:
the effective medium introduced into the mixing section (3) is sprayed in a single-point mode or in multiple points.
6. The supersonic gas flow and swirl negative pressure coupled remote injection method of claim 1, further comprising: the applicable effective medium types comprise dry powder, fog drops, foam and sterilizing agents.
7. An apparatus for implementing the supersonic gas flow and cyclone negative pressure coupled remote spraying method of claim 1, wherein the apparatus comprises:
a through cylindrical cavity formed in the device is used as a spraying channel, the inlet position of an effective medium is used as a boundary, a mixing section (3) of the spraying channel is arranged behind the spraying direction, and a rotational flow section (2) of the spraying channel is arranged in front of the mixing section;
an effective medium conveying channel (4) which is directly inserted into the jet channel along the radial direction is used for introducing effective media, a port exposed out of the device is used as an effective medium inlet, and the tail end of the channel inserted into the jet channel is centered and coaxially arranged in the jet channel along the jet direction;
a laval pipe (5) and a swirl channel which are coaxial with the injection channel are arranged in the swirl section (2) along the whole section, the laval pipe (5) is arranged in the swirl section (2) in the center, the inner area of the laval pipe is sequentially provided with a contraction pipe section (51), a throat pipe section (52) and an expansion pipe section (53) along the injection direction, the inlet section (1) of the laval pipe (5) is formed by extending from the port of the contraction pipe section along the axial direction of the injection channel along the inner diameter equal to that of the injection channel, and the port of the expansion pipe section (53) is opposite to the effective medium conveying channel (4);
in whirl section (2), form annular region (6) between Laval pipe (5) outer wall and the injection passage inner wall, establish helical blade (7) that are the spiral arrangement in whirl section (2) whole section along the injection direction in annular region (6) to communicate with each other in front end and the tangential whirl entry (8) on the device, constitute the whirl passageway, the whirl passageway seals towards the outer one end of injection passage, and the power medium of peripheral whirl is through tangential whirl entry (8) along being tangent tangential direction with the injection passage inner wall and let in the annular region (6) of whirl passageway, relies on inertia to form under the restraint of annular inner wall and the water conservancy diversion effect of helical blade (7) peripheral whirl.
8. An apparatus for implementing the supersonic gas flow and cyclone negative pressure coupled remote spraying method of claim 1, wherein:
a through cylindrical cavity formed in the device is used as a spraying channel, the inlet position of an effective medium is used as a boundary, a mixing section (3) of the spraying channel is arranged behind the spraying direction, and a swirling section (2) of the spraying channel is arranged in front of the mixing section;
an effective medium conveying channel (4) which is directly inserted into the jet channel along the radial direction is used for introducing effective media, a port exposed out of the device is used as an effective medium inlet, and the tail end of the channel inserted into the jet channel is centered and coaxially arranged in the jet channel along the jet direction;
a laval pipe (5) and a swirl channel which are coaxial with the injection channel are arranged in the swirl section (2) along the whole section, the laval pipe (5) is arranged in the swirl section (2) in the center, the inner area of the laval pipe is sequentially provided with a contraction pipe section (51), a throat pipe section (52) and an expansion pipe section (53) along the injection direction, the inlet section (1) of the laval pipe (5) is formed by axially extending from the port of the contraction pipe section (51) to the outside of the injection channel along the equal inner diameter, and the port of the expansion pipe section (53) is opposite to the effective medium conveying channel (4);
in whirl section (2), form annular region (6) between Laval pipe (5) outer wall and the injection passage inner wall annular region (6) establish helical blade (7) that are the spiral arrangement in whirl section (2) whole section along the injection direction in annular region (6) constitutes the whirl passageway, whirl passageway axial link up, and the outer one end of orientation injection passageway is as whirl entry (9).
9. An apparatus for implementing the supersonic gas flow and cyclone negative pressure coupled remote spraying method of claim 1, wherein:
a through cylindrical cavity formed in the device is used as a spraying channel, the inlet position of an effective medium is used as a boundary, a mixing section (3) of the spraying channel is arranged behind the spraying direction, and a swirling section (2) of the spraying channel is arranged in front of the mixing section;
an effective medium conveying channel (4) which is directly inserted into the injection channel along the radial direction is used for introducing effective media, a port exposed out of the device is used as an effective medium inlet, and the tail section of the channel inserted into the injection channel is arranged in the injection channel in a centered and coaxial manner along the injection direction;
a laval pipe (5) and a swirl flow channel which are coaxial with the injection channel are arranged in the swirl section (2) along the whole section, the laval pipe (5) is arranged in the swirl section (2) in the middle, the inner area of the laval pipe is sequentially provided with a contraction pipe section (51), a throat pipe section (52) and an expansion pipe section (53) along the injection direction, the inlet section (1) of the laval pipe (5) is formed by axially extending from the port of the contraction pipe section (51) along the outer edge of the injection channel with the same inner diameter, and the port of the expansion pipe section (53) is opposite to the effective medium conveying channel (4);
in whirl section (2), form annular region (6) between Laval pipe (5) outer wall and the injection passage inner wall, annular region (6) communicate with each other in front end and tangential whirl entry (8) on the device, constitute the whirl passageway, the outer one end of whirl passageway orientation injection passage is sealed, and the power medium of peripheral whirl is through tangential whirl entry (8) along being tangent tangential direction with the injection passage inner wall in letting in the annular region (6) of whirl passageway, relies on inertia to form under the restraint of annular inner wall peripheral whirl.
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| CN113083539B (en) * | 2021-03-30 | 2022-10-18 | 刘庭乐 | Plastic spraying forming equipment for steel belt for packaging and control method thereof |
| CN114750077B (en) * | 2022-04-28 | 2023-12-08 | 深圳市鑫意晟科技有限公司 | Jet spray gun |
| CN115445808A (en) * | 2022-09-22 | 2022-12-09 | 苏州守洁环保设备有限公司 | Adjustable double-fluid spraying equipment |
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