CN212631523U - Fire control sandblast barrel - Google Patents
Fire control sandblast barrel Download PDFInfo
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- CN212631523U CN212631523U CN202020861446.4U CN202020861446U CN212631523U CN 212631523 U CN212631523 U CN 212631523U CN 202020861446 U CN202020861446 U CN 202020861446U CN 212631523 U CN212631523 U CN 212631523U
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- pipe
- outer pipe
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- left end
- fire
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Abstract
The utility model relates to a fire-fighting sand blasting gun barrel, which comprises a sand inlet pipe, an air inlet pipe, an outer pipe, an inner pipe and a connecting ring; the left end of the outer pipe is closed, the right end of the outer pipe is opened, the sand inlet pipe is fixedly inserted into the left end of the outer pipe and concentrically arranged with the outer pipe, one end of the air inlet pipe is fixedly inserted into the left end of the outer pipe and mutually communicated with the interior of the outer pipe, the inner pipe is concentrically arranged inside the outer pipe, and the connecting ring is fixedly sleeved outside the inner pipe and fixedly embedded on the inner wall of the outer pipe; the utility model discloses can be with gravel and air current intermix and effectively avoid the collision between gravel and the pipe wall in order to prevent energy loss to the air current that will mix the gravel accelerates to the supersonic speed in order to enlarge the throw distance by a wide margin, makes operating personnel can be in the position department of keeping away from the scene of a fire with the gravel fast spray to the scene of a fire optional position, efficient, effective cover distance is far away, and can ensure operating personnel's life safety.
Description
Technical Field
The utility model relates to a fire control sandblast barrel.
Background
Civil fire fighting equipment such as fire extinguishers, fire hoses, and sand boxes can cope with small-scale fires. However, in places such as chemical plants, power plants, chemical storage and transportation and the like, fire passing areas are large, and ignition materials are mostly toxic and harmful substances, so that fire is usually extinguished by covering gravel on the surface; particularly with water-explosive chemicals, gravel packing is the only effective means.
The existing gravel covering mode is that gravel is transported to the position closest to a fire scene through a vehicle, then the gravel is unloaded, and then the gravel is shoveled by a worker or a bulldozer.
SUMMERY OF THE UTILITY MODEL
To the current situation of above-mentioned prior art, the utility model aims to solve the technical problem that a fire control sandblast gun barrel that can accelerate the air current that has mixed the gravel to the supersonic speed in order to enlarge the throw distance by a wide margin, efficient, effective cover distance is far away to can ensure operating personnel's life safety is provided.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a fire-fighting sand-blasting gun barrel is characterized by comprising a sand inlet pipe, an air inlet pipe, an outer pipe, an inner pipe and a connecting ring; the left end of the outer pipe is closed, the right end of the outer pipe is open, the sand inlet pipe is fixedly inserted into the left end of the outer pipe and is arranged concentrically with the outer pipe, one end of the air inlet pipe is fixedly inserted into the left end of the outer pipe and is communicated with the interior of the outer pipe, a first injection head is formed at one end of the sand inlet pipe, the first injection head is arranged inside the left end of the outer pipe, the inner pipe is concentrically arranged inside the outer pipe, the connecting ring is fixedly sleeved outside the inner pipe and is fixedly embedded on the inner wall of the outer pipe, and the first injection head is inserted into the left end of the inner pipe and forms a primary Laval pipe with the inner wall of the left end of the inner pipe; a plurality of air holes which are distributed at equal angles along the circumferential direction are formed in the connecting ring; a second spray head is formed at the right end of the inner pipe, and an outer ring Laval pipe is formed between the second spray head and the inner wall of the outer pipe; the inner wall of the middle part of the inner pipe is outwards provided with a convex ring which is distributed in the circumferential direction, and a secondary Laval pipe is formed inside the convex ring.
Preferably, a throat is formed between the primary laval pipe and the position where the outer diameter of the first spray head is the largest, a primary contraction section and a primary expansion section are respectively formed on the left side and the right side of the throat, the sectional area of the primary contraction section is continuously reduced from left to right, and the sectional area of the primary expansion section is continuously increased from left to right.
Preferably, the left and right sides of bulge loop is formed with first arc circle and the second arc circle that has the annular distribution respectively, the inside of first arc circle has formed secondary contraction section, the sectional area of secondary contraction section reduces from left to right in succession, secondary contraction section cover is established in the outside of first shower nozzle and is communicate each other with primary expansion section.
Preferably, the inner portion of the second arcuate loop forms a secondary diverging section having a cross-sectional area that increases continuously from left to right.
Compared with the prior art, the utility model has the advantages of: the utility model discloses can be with gravel and air current intermix and effectively avoid the collision between gravel and the pipe wall in order to prevent energy loss to the air current that will mix the gravel accelerates to the supersonic speed in order to enlarge the throw distance by a wide margin, makes operating personnel can be in the position department of keeping away from the scene of a fire with the gravel fast spray to the scene of a fire optional position, efficient, effective cover distance is far away, and can ensure operating personnel's life safety.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a cross-sectional view of the primary laval tube of the present invention;
fig. 3 is a graph showing the profile design of the primary and secondary laval tubes of the present invention.
Detailed Description
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
To maintain the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and components may be omitted.
As shown in fig. 1 to 3, a fire-fighting sand blasting gun barrel comprises a sand inlet pipe 1, an air inlet pipe 2, an outer pipe 3, an inner pipe 4 and a connecting ring 5; the left end of the outer tube 3 is closed, the right end of the outer tube 3 is opened, the sand inlet tube 1 is inserted and fixed at the left end of the outer tube 3 and is concentrically arranged with the outer tube 3, one end of the air inlet tube 2 is inserted and fixed at the left end of the outer tube 3 and is mutually communicated with the inside of the outer tube 3, a first injector head 11 is formed at one end of the sand inlet tube 1, the first injector head 11 is arranged inside the left end of the outer tube 3, the inner tube 4 is concentrically arranged inside the outer tube 3, the connecting ring 5 is sleeved and fixed outside the inner tube 4 and is embedded and fixed on the inner wall of the outer tube 3, and the first injector head 11 is inserted inside the left end of the inner tube 4 and forms a primary Laval tube 6 with; a plurality of air holes 51 distributed at equal angles along the circumferential direction are arranged in the connecting ring 5; a second spray head 41 is formed at the right end of the inner pipe 4, and an outer ring Laval pipe 7 is formed between the second spray head 41 and the inner wall of the outer pipe 3; the inner wall of the middle part of the inner pipe 4 is outwards provided with a convex ring 42 which is distributed annularly, and the inner part of the convex ring 42 forms a secondary Laval pipe 8.
A throat 62 is formed between the primary laval pipe 6 and the maximum outer diameter of the first spray head 11, a primary contraction section 61 and a primary expansion section 63 are respectively formed on the left and right sides of the throat 62, the sectional area of the primary contraction section 61 continuously decreases from left to right, and the sectional area of the primary expansion section 63 continuously increases from left to right.
The left side and the right side of the convex ring 42 are respectively provided with a first arc-shaped ring 43 and a second arc-shaped ring 44 which are distributed in an annular direction, a secondary contraction section 81 is formed inside the first arc-shaped ring 43, the sectional area of the secondary contraction section 81 is continuously reduced from left to right, the secondary contraction section 81 is sleeved outside the first spray head 11 and is communicated with the primary expansion section 63, a secondary expansion section 82 is formed inside the second arc-shaped ring 44, and the sectional area of the secondary expansion section 82 is continuously increased from left to right.
The design method of the fire-fighting sand-blasting gun barrel profile comprises the following steps:
step one, calculating the curvature of the inner wall of the primary contraction section 61 according to the formula (1) to obtain a one-dimensional flow curve, as shown in fig. 3;
in equation (1):
x is the transverse length at any point from the entrance of the primary constriction 61;
d is the diameter at the inlet of the primary constriction 61;
dt is the diameter at the throat 62;
di is the cross-sectional diameter at x;
l: the length of the primary constriction 61.
Step two, dividing the primary expansion section 63 and the secondary expansion section 82 into 3 areas by adopting a Cresci analysis method: an AODB region where the source flow gradually forms, a BDEC region where the source flow is rectified to parallel uniform flows with the same mach number, a BFC section where the profile eliminates reflection of all the expansion waves on the wall, see fig. 3;
and step three, designing an AB section curve by adopting an empirical curve of a Foelsch method.
Step four, the BDEF area is a partial wave absorbing area, the axial distribution of the BDEF area is determined according to a formula (2), and a speed distribution formula (3) of a DE section is obtained after conversion and simplification;
wherein x is (x-x)D)/(xE-xD) The third-order polynomial satisfies the following boundary conditions:
select xESubstituting these boundary conditions into a first polynomial, simplified to obtain:
and step five, determining the positions of the point D and the point E according to a formula (3), determining the position of a characteristic line end point C by taking a left-row characteristic line of the point E as a straight line, taking BD, DE and EC as boundary conditions, and calculating the profile curve of the BC section by using a ternary characteristic linear theory and a mass conservation law.
When in use, compressed air enters the primary contraction section 61 of the primary Laval pipe 6 through the air inlet pipe 2, is accelerated to supersonic speed through the primary contraction section 61, and generates vacuum in the sand inlet pipe 1, the sand box is connected with the left end of the sand inlet pipe 1 through the steel wire framework hose, gravel in the sand box is sucked into the sand inlet pipe 1 under the vacuum action of the sand inlet pipe 1 and then enters the left end of the inner pipe 4, and thus the gravel and the supersonic speed air flow are mixed in the primary expansion section 63; then, the supersonic airflow mixed with the gravel flows to the right into the secondary contraction section 81, slows down under the action of the secondary contraction section 81, then enters the secondary expansion section 82 to accelerate again and is ejected outwards from the right end of the inner pipe 4; meanwhile, the airflow entering the outer pipe 3 enters the outer ring Laval pipe 7 through the plurality of air holes 51 in the connecting ring 5 and is accelerated to be above the sonic speed, the supersonic airflow generated by the structure can prevent the sand ejected from the right end of the inner pipe 4 from impacting the inner wall of the outer pipe 3 to cause energy loss, and meanwhile, the air-sand mixture is further accelerated and finally ejected from the right end of the outer pipe 3.
The utility model discloses can be with gravel and air current intermix and effectively avoid the collision between gravel and the pipe wall in order to prevent energy loss to the air current that will mix the gravel accelerates to the supersonic speed in order to enlarge the throw distance by a wide margin, makes operating personnel can be in the position department of keeping away from the scene of a fire with the gravel fast spray to the scene of a fire optional position, efficient, effective cover distance is far away, and can ensure operating personnel's life safety.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (4)
1. A fire-fighting sand-blasting gun barrel is characterized by comprising a sand inlet pipe, an air inlet pipe, an outer pipe, an inner pipe and a connecting ring; the left end of the outer pipe is closed, the right end of the outer pipe is open, the sand inlet pipe is fixedly inserted into the left end of the outer pipe and is arranged concentrically with the outer pipe, one end of the air inlet pipe is fixedly inserted into the left end of the outer pipe and is communicated with the interior of the outer pipe, a first injection head is formed at one end of the sand inlet pipe, the first injection head is arranged inside the left end of the outer pipe, the inner pipe is concentrically arranged inside the outer pipe, the connecting ring is fixedly sleeved outside the inner pipe and is fixedly embedded on the inner wall of the outer pipe, and the first injection head is inserted into the left end of the inner pipe and forms a primary Laval pipe with the inner wall of the left end of the inner pipe; a plurality of air holes which are distributed at equal angles along the circumferential direction are formed in the connecting ring; a second spray head is formed at the right end of the inner pipe, and an outer ring Laval pipe is formed between the second spray head and the inner wall of the outer pipe; the inner wall of the middle part of the inner pipe is outwards provided with a convex ring which is distributed in the circumferential direction, and a secondary Laval pipe is formed inside the convex ring.
2. The fire fighting sand blast gun barrel according to claim 1, wherein a throat is formed between the primary laval pipe and the position where the outer diameter of the first spray head is the largest, a primary contracting section and a primary expanding section are formed on the left and right sides of the throat, respectively, the sectional area of the primary contracting section continuously decreases from left to right, and the sectional area of the primary expanding section continuously increases from left to right.
3. The fire-fighting sand-blasting gun barrel according to claim 2, wherein the left side and the right side of the convex ring are respectively provided with a first arc-shaped ring and a second arc-shaped ring which are distributed in an annular manner, a secondary contraction section is formed inside the first arc-shaped ring, the sectional area of the secondary contraction section is continuously reduced from left to right, and the secondary contraction section is sleeved outside the first spray head and is communicated with the primary expansion section.
4. A fire fighting blast gun barrel according to claim 3, wherein the second arcuate collar internally defines a secondary expansion section having a cross-sectional area which increases continuously from left to right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020861446.4U CN212631523U (en) | 2020-05-21 | 2020-05-21 | Fire control sandblast barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020861446.4U CN212631523U (en) | 2020-05-21 | 2020-05-21 | Fire control sandblast barrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212631523U true CN212631523U (en) | 2021-03-02 |
Family
ID=74793327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020861446.4U Withdrawn - After Issue CN212631523U (en) | 2020-05-21 | 2020-05-21 | Fire control sandblast barrel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212631523U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111467722A (en) * | 2020-05-21 | 2020-07-31 | 南京湛泸科技有限公司 | Fire-fighting sand-blasting gun barrel and design method of molded surface thereof |
| CN117449897A (en) * | 2023-11-20 | 2024-01-26 | 山西潞安环保能源开发股份有限公司 | Fire extinguishing device for mine |
-
2020
- 2020-05-21 CN CN202020861446.4U patent/CN212631523U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111467722A (en) * | 2020-05-21 | 2020-07-31 | 南京湛泸科技有限公司 | Fire-fighting sand-blasting gun barrel and design method of molded surface thereof |
| CN111467722B (en) * | 2020-05-21 | 2023-07-04 | 南京湛泸科技有限公司 | Fire-fighting sand blasting gun tube and design method of molded surface thereof |
| CN117449897A (en) * | 2023-11-20 | 2024-01-26 | 山西潞安环保能源开发股份有限公司 | Fire extinguishing device for mine |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20210302 Effective date of abandoning: 20230704 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20210302 Effective date of abandoning: 20230704 |